EP3917694A1 - Verändern der effektiven kontur einer lauffläche einer arbeitswalze während des warmwalzens eines walzguts in einem walzgerüst zu einem gewalzten band - Google Patents
Verändern der effektiven kontur einer lauffläche einer arbeitswalze während des warmwalzens eines walzguts in einem walzgerüst zu einem gewalzten bandInfo
- Publication number
- EP3917694A1 EP3917694A1 EP20700385.6A EP20700385A EP3917694A1 EP 3917694 A1 EP3917694 A1 EP 3917694A1 EP 20700385 A EP20700385 A EP 20700385A EP 3917694 A1 EP3917694 A1 EP 3917694A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- work roll
- roll
- work
- wear
- 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
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
-
- 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
- B21B2001/225—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 by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
- B21B2027/022—Rolls having tapered ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/18—Roll crown; roll profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/18—Roll crown; roll profile
- B21B2267/20—Ground camber or profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/24—Roll wear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2269/00—Roll bending or shifting
- B21B2269/12—Axial shifting the rolls
- B21B2269/14—Work rolls
Definitions
- the present invention relates to the technical field of rolling mill technology. Specifically, the invention relates to the hot rolling of a rolling stock made of a metallic material, in particular steel or aluminum, to form a rolled strip in a rolling stand.
- the upper and the lower work roll of a roll stand each have a conical section, an inwardly running tread and a cylindrical shoulder.
- the upper work roll is installed in the roll stand in the opposite direction to the lower work roll.
- it is intended to shift the work rolls during rolling in opposite axial directions.
- a strip edge of the rolled strip always lies on the edge between the conical section and the tread. This measure extends the life of the work rolls in a rolling campaign without changing or regrinding the work rolls to 150 km and more. How the effective contour of the tread of a work roll can be changed to a rolled strip during the hot rolling of the rolling stock in a rolling stand is shown in
- the object of the invention is to provide a method and a device for changing the effective contour of a tread of a work roll during the hot rolling of a rolling stock in a roll stand between two work rolls to form a rolled strip.
- the effective contour of a tread of a work roll is to be understood as the contour which the tread of a work roll (which is not axially displaced during hot rolling) should have, so that a certain profile or a certain flatness occurs in the rolled strip when hot rolling a rolling stock.
- the object according to the invention is achieved by a method for reducing an effective contour of a running surface of a work roll during the hot rolling of a rolling stock in a rolling stand to a rolled strip according to claim 1, the rolling stand comprising:
- each work roll having two ends for rotationally mounting the work roll in insert pieces, each work roll has a ke-shaped section in the axial direction and subsequently a running surface,
- the upper work roll is installed in the opposite direction to the lower work roll
- each work roll has a separate Verschiebeein direction for axially moving the work roll, comprising the method steps:
- the contour of the tread is flattened or leveled. In other words, the effective contour becomes flatter.
- the so-called “strip crown”, e.g. Co, C25, C40 can be reduced.
- the roll stand and the work rolls of the roll stand are designed, for example, according to FIG. 1 of WO 2017/215595. In the present invention, however, it is not absolutely necessary that the running surfaces of the work rolls run inwards.
- the rolling stock is hot-rolled in the roll gap between the upper and lower work rolls of the rolling stand, the work rolls being worn out by contact with the rolling stock. Specifically, the radius of the treads increases due to the wear of the work rolls around Ar from.
- the work rolls are each moved in opposite axial directions, for example the upper work roll to the right and the lower work roll to the left. If a respective work roll is moved by a
- Ar indicates the speed of wear of the tread of a work roll in the radial direction.
- the object according to the invention is achieved by a method for increasing an effective contour of a running surface of a work roll during the hot rolling of a rolling stock in a roll stand to a rolled strip according to claim 3, the roll stand comprising:
- each work roll having two ends for rotationally mounting the work roll in insert pieces
- each work roll has a ke-shaped section in the axial direction and subsequently a running surface
- the upper work roll is installed in the opposite direction to the lower work roll
- each work roll has a separate Verschiebeein direction for axially moving the work roll, comprising the method steps:
- the rolling mill can set up or the work rolls of the rolling stand can e.g. 1 WO 2017/215595.
- the tread of the work rolls it is not absolutely necessary for the tread of the work rolls to run inwards.
- a respective work roll is shifted
- the effective contour increases or becomes steeper.
- the object of the invention is also achieved by a device for changing an effective contour of a running surface of a work roll during the hot rolling of a rolling stock in a roll stand to a rolled strip according to claim 7, wherein the roll stand comprises:
- each work roll having two ends for rotationally mounting the work roll in insert pieces
- each work roll has a ke-shaped section in the axial direction and subsequently a running surface
- the running surfaces of the work rolls have a non-cylindrical starting contour before hot rolling
- the upper work roll is arranged in the opposite direction to the lower work roll
- the device according to the invention is suitable both for reducing and for increasing an effective contour of a tread of a work roll during the hot rolling of a rolling stock between the two work rolls in a roll stand. By reducing or increasing the effective contour, the profile and / or the flatness of the strip can be influenced in a targeted manner.
- the device for determining the radial wear or the speed of wear Ar of the running surface of the work rolls determines the wear of the running surface in the radial direction.
- the determination can either be made using measurement technology, or preferably with the aid of a wear model which takes into account, for example, the rolling force F, the distance covered by the work roll s Um fan g and / or the rolling time.
- the device for determining the wear Ar or the speed of wear Ar of the tread is connected to a Dickenmessein device for measuring the thickness of the rolled strip and a device for determining the distance between the upper and lower work rolls. From the, typically vertical, distance between the work rolls and the measured thickness of the strip, the wear or the speed of the wear can be determined.
- the device for determining the wear Ar or the speed of the wear Ar of the tread has a wear model (see EP 2 548 665 B1), the wear model being used to determine at least one of the group of a rolling force measuring device of the rolling force F, the order is s f HS and a clock connected from the work roll to back distance traveled for determining the rolling time.
- the device according to claim 7 also has a measuring device for determining the profile and / or the flatness of the rolled strip, the measuring device being arranged in the direction of mass flow downstream of the roll stand.
- control device for axially moving the work rolls in opposite directions depending on the wear or the speed of wear of the work rolls also takes into account the measured profile PRIst and / or the measured flatness PLIst of the rolled strip.
- control device is connected to the device for determining the wear or the speed of wear and the measuring device for determining the profile and / or the flatness of the rolled strip.
- the displacement device itself can e.g. an electro-mechanical (e.g. a ball screw with an electric motor) or a hydraulic drive.
- an electro-mechanical e.g. a ball screw with an electric motor
- a hydraulic drive e.g. a hydraulic drive.
- the starting contour of a tread is a parabolic contour with a depth of 100 to 300 pm, the central area is thinner than an edge area of the parabolic contour.
- FIG. 1 shows a schematic representation of a roll stand with an upper and a lower work roll for changing an effective contour of a running surface of a work roll during the hot rolling of a rolling stock into a strip
- Figure 2 is a schematic representation of an inventive ⁇ SEN device for changing an effective contour of a tread of a work roll during hot rolling of a rolled material into a strip with the rolling mill of Figure 1,
- 3a ... 3d an illustration of a method according to the invention for reducing the effective contour during the hot rolling of a rolling stock into a strip in a roll stand
- FIG. 5 shows a comparison of the strip profiles from FIG. 3 with FIG. 4,
- Fig. 6 is a schematic representation of a portion of a work roll.
- Figure 1 shows schematically a roll stand 2 as part of a device for changing the effective contour of a running surface 8 of a work roll 3, 4 during the hot rolling of a rolling stock in a roll stand 2 to a rolled strip 1.
- the rolling stock is hot-rolled in the roll gap between the upper work roll 3 and the lower work roll 4.
- Each work roll 3, 4 has two ends 5, each in a chock 6 in a roll stand, not shown, of the roll stand
- each work roll 3, 4 comprises a conical section 7 and a Laufflä surface 8 (see also Fig. 6).
- the upper work roll 3 is installed in the opposite direction to the lower work roll 4 in the roll stand 2.
- the upper and lower work rolls 3, 4 can be moved in the axial direction during operation by means of separate displacement devices 9.
- the upper work roll has a device for determining wear 11 or the device according to the invention has a wear model.
- a single device 11 or a single wear model is sufficient if the work rolls 3, 4 are made of the same material.
- the upper and lower work rolls 3, 4 each have a separate device for determining the wear 11 or a separate wear model. This can be useful if the work rolls 3, 4 during hot rolling with be operated at different speeds.
- the Ar beitswalzen 3, 4 are made of the same material and are operated at the same speed.
- the measurement of the wear Ar or the speed of wear Ar of the tread 8 of the work rolls 3, 4 in the radial direction can be contact-related, for example by a roller which touches the tread 8, or contactless, for example optically. Since the axial displacement of the work rolls in the roll stand to compensate for wear is already known from WO
- 2017/215595 Al is known, details on this are included by reference to this document. However, it is not known from this document how the effective contour can be specifically changed during the rolling of a strip.
- backup rolls have been omitted for reasons of clarity. It is known to any expert in the field of rolling mill technology that backup rolls are common and counteract deflection of the work rolls.
- FIG. 2 schematically shows a device for changing the effective contour of a running surface of a work roll during the hot rolling of a rolling stock in a roll stand 2 of a five-stand finishing mill train, for example in a casting-rolling composite system.
- the rolling stock not shown, is fed via a roller table 17 to the finishing mill with the roll stands 2a to 2e and is finished-rolled there in the warm state.
- the wear Ar or the wear rate Ar of the running surfaces 8 of the work rolls 3, 4 is measured by the measuring device 11 (see FIG. 1).
- the device further comprises a measuring device 12 for determining the profile or the flatness of the rolled strip.
- This measuring device is arranged in the mass flow direction after the roll stand 2.
- the actual profile PRi st is fed to a control device 13.
- the control device 13 is also supplied with the target profile PRs oii .
- the control device 13 calculates, taking into account the wear Ar or the wear speed Ar, and optionally the measured profile PRi st and the desired profile PRs oii ⁇ the displacement path s or the displacement speed s for the upper and lower work roll 3, 4 (see Fig. 1). By moving the work rolls 3, 4 faster or slower, the effective contour of the work rolls can be changed in a targeted manner.
- the rolled strip is cooled in a cooling section 18 and then conveyed out, for example by winding.
- a strip 1 is hot-rolled in the roll gap between the upper work roll 3 and the lower work roll 4.
- the tape has an initial thickness.
- Both work rolls 3, 4 each have two ends 5, a conical section 7 and a tread 8.
- the top work roll 3 is built in the opposite direction to the lower work roll 4.
- the treads 8 of the working rolls 3, 4 are worn out in the radial direction by an amount Ar (see FIG. 3b). If the vertical distance between the two work rolls 3, 4 is kept constant, the rolled strip 1 will be approx. 2Ar thicker. By continuing the hot rolling, the running surfaces 8 of the work rolls 3, 4 are worn down by the amount of 2.Ar (see FIG. 3c), so that the strip becomes approximately 4Ar thicker.
- the work rolls 3, 4 are axially displaced ver that the displacement of the work rolls 3, 4 in
- the wear of a work roll 3, 4 in the radial direction and a indicates the pitch angle of the conical section.
- the displacement can be written down via the speed of the wear Ar, where then a work roll 3, 4 with an axial speed
- this method leads to the distance between the contour of the band 1 between the two edges and the contour of the band 1 at the edges increasing over time.
- the effective contour of the work rolls 3, 4 is steer or the effective contour of the work rolls 3, 4 is increased.
- FIGS. 3b, 3c, 4b and 4c part of the undisclosed tread 8 of the upper work roll 3 is shown in broken lines. The distance between the unworn and the worn tread 8 gives the wear Ar in the radial direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19153870.1A EP3685930B1 (de) | 2019-01-28 | 2019-01-28 | Lokales verändern des walzspalts im bereich der bandkanten eines gewalzten bands |
| EP19219974 | 2019-12-30 | ||
| PCT/EP2020/050684 WO2020156787A1 (de) | 2019-01-28 | 2020-01-13 | Verändern der effektiven kontur einer lauffläche einer arbeitswalze während des warmwalzens eines walzguts in einem walzgerüst zu einem gewalzten band |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3917694A1 true EP3917694A1 (de) | 2021-12-08 |
| EP3917694C0 EP3917694C0 (de) | 2023-08-09 |
| EP3917694B1 EP3917694B1 (de) | 2023-08-09 |
Family
ID=69156442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20700385.6A Active EP3917694B1 (de) | 2019-01-28 | 2020-01-13 | Verändern der effektiven kontur einer lauffläche einer arbeitswalze während des warmwalzens eines walzguts in einem walzgerüst zu einem gewalzten band |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US11919059B2 (de) |
| EP (1) | EP3917694B1 (de) |
| CN (1) | CN113316491B (de) |
| ES (1) | ES2954881T3 (de) |
| WO (1) | WO2020156787A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021209714A1 (de) * | 2020-09-22 | 2022-03-24 | Sms Group Gmbh | Vorrichtung und Verfahren zum Walzen von metallischem Band |
| CN114260315A (zh) * | 2021-12-24 | 2022-04-01 | 重庆钢铁股份有限公司 | 棒线材热轧线上粗中轧无孔型轧辊使用方法 |
| CN115591948B (zh) * | 2022-10-13 | 2024-05-14 | 福建鼎盛钢铁有限公司 | 一种提高esp带钢断面尺寸控制精度的方法 |
| CN117548491A (zh) * | 2023-12-21 | 2024-02-13 | 一重集团大连工程技术有限公司 | 一种工作辊的轴向定位装置及辊轧机 |
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| SU1049130A1 (ru) | 1982-07-26 | 1983-10-23 | Донецкий Ордена Трудового Красного Знамени Политехнический Институт | Способ дрессировки полос |
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| RU2615670C1 (ru) | 2015-10-05 | 2017-04-06 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Липецкий государственный технический университет" (ЛГТУ) | Способ горячей прокатки полос |
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| CN108405628B (zh) * | 2018-03-13 | 2020-04-07 | 武汉钢铁有限公司 | 一种热轧无取向硅钢最佳断面轮廓控制方法 |
-
2020
- 2020-01-13 US US17/310,246 patent/US11919059B2/en active Active
- 2020-01-13 WO PCT/EP2020/050684 patent/WO2020156787A1/de not_active Ceased
- 2020-01-13 EP EP20700385.6A patent/EP3917694B1/de active Active
- 2020-01-13 ES ES20700385T patent/ES2954881T3/es active Active
- 2020-01-13 CN CN202080011252.8A patent/CN113316491B/zh active Active
-
2024
- 2024-01-22 US US18/419,008 patent/US12285790B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3917694C0 (de) | 2023-08-09 |
| US20240173759A1 (en) | 2024-05-30 |
| ES2954881T3 (es) | 2023-11-27 |
| US20220126337A1 (en) | 2022-04-28 |
| CN113316491B (zh) | 2023-08-11 |
| EP3917694B1 (de) | 2023-08-09 |
| CN113316491A (zh) | 2021-08-27 |
| US12285790B2 (en) | 2025-04-29 |
| WO2020156787A1 (de) | 2020-08-06 |
| US11919059B2 (en) | 2024-03-05 |
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