EP4351813A1 - Überbrückung einer produktionsunterbrechung in einer giess-walz-verbundanlage - Google Patents
Überbrückung einer produktionsunterbrechung in einer giess-walz-verbundanlageInfo
- Publication number
- EP4351813A1 EP4351813A1 EP22726029.6A EP22726029A EP4351813A1 EP 4351813 A1 EP4351813 A1 EP 4351813A1 EP 22726029 A EP22726029 A EP 22726029A EP 4351813 A1 EP4351813 A1 EP 4351813A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lifting
- section
- lifting arm
- casting
- starting material
- 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
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- 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
- B21B13/22—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting, i.e. in-line rolling of steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
Definitions
- the present invention relates to the technical field of combined casting and rolling plants and the production of a hot-rolled finished strip on a combined casting and rolling plant.
- a strand of endless starting material such as a slab or thin slab strand
- molten metal typically molten steel
- the strand is then finish-rolled in a finishing train to form a hot-rolled finished strip.
- Endless operation has proven particularly effective in the production of thin or ultra-thin finished strip, with the strand produced in the continuous caster being rolled uncut in the finishing rolling train to form the finished strip and the finished strip being cut for the first time either before or after the cooling section.
- the present invention relates to a method for the production of a hot-rolled finished strip in a combined casting and rolling plant, in which, in endless operation, a strand of endless starting material runs uncut through a device for dividing and conveying out at a transport speed, and the starting material is fed into a finishing train finish-rolled with the finished strip, then cooled, cut up and stored.
- the invention relates to a combined casting and rolling plant for the production of a hot-rolled finished strip from an endlessly continuously cast starting material, comprising a continuous casting plant, a device for dividing and conveying out, in the direction of material flow having a first pair of shears, a lifting device and a pair of clamping rollers, a multi-stand finishing train for Finish rolling of the pre-material to the finished strip, a cooling section for cooling the finished strip and a storage device for ejecting the finished strip.
- WO 2009/121678 A1 discloses a combined casting and rolling plant for the production of a hot-rolled finished strip.
- endless operation an undivided strand of endless primary material runs through a device for dividing and conveying out at a transport speed, and the primary material is finish-rolled in a finishing rolling train to form the finished strip.
- the raw material is first cut, then lifted, the following raw material is cut up into scrap pieces and the scrap pieces are conveyed out.
- the starting material blocking the rear part of the plant is then removed from the plant.
- the object of the invention is to change an existing casting-rolling compound plant for the production of a hot-rolled finished strip from an endlessly continuously cast starting material and an existing method for the production of a hot-rolled finished strip in a casting-rolling compound plant in such a way that in the event of an interruption in a part of the plant that is downstream of a device for dividing and conveying out in the direction of material flow, even thick primary material with a thickness > 30 mm, preferably > 45 mm, can be separated quickly and reliably from subsequent primary material (e.g. from the continuous casting plant or the roughing train).
- the lifting device in the device for dividing and conveying out would have to be made very solid in order to be able to lift starting material with a thickness >30 mm, preferably >45 mm.
- the lifting beam Due to the massive design, the lifting beam is very heavy and the hydraulic cylinders are also very large in order to lift the raw material so quickly that a collision between the blocking input material and the input material coming from the continuous casting plant or the roughing train can be reliably prevented.
- the volume flow required to be able to extend the hydraulic cylinders so quickly also increases sharply, which increases the costs for the hydraulic supply.
- its mass moment of inertia increases sharply, which in turn causes the forces and pressures in the hydraulic system to rise sharply.
- the solution is a method for producing a hot-rolled finished strip in a combined casting and rolling plant, with a strand of endless starting material running uncut through a device for cutting and conveying out at a transport speed in endless operation, and the starting material in a finishing train to the finished strip is finish-rolled, then cooled, cut up and stored, characterized in that the following process steps are carried out in the device for cutting up and conveying out to bridge a production interruption in a downstream part of the plant in the direction of material flow: a) Accelerating at least one cutting edge of a first pair of shears, as a result of which the cutting of the endless input material is introduced; b) clamping of the endless starting material by a pair of clamping rollers, the pair of clamping rollers being arranged after the first shears in the direction of material flow; c) lifting of the endless starting material by a lifting device, the lifting device being arranged in the direction of material flow between the first shears and the pair of pinch rollers; d) cutting off
- the cutting of the endless starting material is first initiated by accelerating at least one cutting edge of the first shears.
- the first shears can be rotary shears, for example, in which case the peripheral speed of the drums has to be accelerated to the transport speed of the primary material.
- the cut can only be made after the drums have accelerated.
- the endless raw material is clamped by a pair of clamping rollers. This measure has the effect that the raw material is "buckled" in the clamping zone of the pair of clamping rollers, which makes it easier to lift the raw material.
- the endless raw material is then lifted by the lifting device.
- the starting material is only cut after the first shears have lifted the endless starting material, so that there is a separation between the strand section blocking the downstream part of the plant and the following starting material.
- the tension in the strand section is greatly reduced, so that the strand section can be further lifted by the lifting device.
- the starting material that follows is cut into pieces of scrap by the first shears, the pieces of scrap are conveyed out and the strand section is removed until the cast-rolling compound plant is ready for operation again.
- the lifting actuator opens the inner section of the lifting arm, and wherein when the strand section is raised, the outer section of the lifting arm is opposite to the inner section of the lifting arm in the is pivoted clockwise, further raising the outer portion of the lift arm.
- the lifting arm By dividing the lifting arm into two sections, namely an inner section and an outer section, with the outer section being arranged in front of the inner section in the material flow direction when the lifting arm is not raised and the outer section being articulated relative to the inner section, it is possible to unfold only the inner section of the lifting arm by means of a lifting actuator when lifting the endless starting material. As a result, the force or torque required for unfolding falls sharply, so that the lifting actuator can have a thin diameter. Due to the "weak" design of the lifting actuator, it can be extended quickly. Upon subsequent further raising of the strand portion, the outer portion of the lift arm is pivoted clockwise relative to the inner portion of the lift arm, further raising the outer portion of the lift arm. When unfolding the inner section of the lifting arm, the swivel drive is preferably "depressurized" so that the outer section of the lifting arm requires no or negligible additional torque.
- raising the outer portion of the lift arm is intended only for thin material where more tape storage capacity is needed.
- thick starting material e.g. with a thickness between 30 and 45 mm
- the inner portion of the lift arm makes an acute angle with the horizontal.
- the outer portion of the lift arm is typically aligned parallel to the inner portion of the lift arm.
- a device for cutting up and conveying out having a first pair of shears, a lifting device and a pair of pinch rollers in the direction of material flow,
- a storage device for conveying out the finished strip characterized in that the lifting device
- the lift actuator is a first hydraulic cylinder for raising the inner portion of the lift arm.
- the swivel drive is preferably a hydraulic cylinder, called a second hydraulic cylinder, which connects the outer section to the inner section of the lifting arm.
- the inner section (at about 100° relative to the outer section) has a mechanical stop, so that the outer section runs against a stop when it is pivoted.
- the swivel drive can be designed to be particularly short and compact.
- the second hydraulic cylinder is arranged essentially parallel to the inner section of the lifting arm.
- the outer section of the lifting arm comprises at least one preferably cooled tube which is aligned transversely to the material flow direction, the tube being arranged below the primary material when the lifting arm is not in the raised state.
- the tube is aligned parallel to the transverse axis of the starting material and has, for example, a horizontal axis of rotation.
- the tube can either be rigid, ie non-rotatable, or designed as a rotatable roller.
- the tube is cooled, for example, by a liquid coolant, such as cooling water.
- first and the second joint each have horizontal axes of rotation.
- the second joint is arranged below the primary material when the lifting arm is not in the raised state.
- the strand section is carried upwards by the tube and the second joint, thereby pulling the base of the stock away from the first shears.
- roller table that can be lowered below the lifting arm.
- the lowerable roller table can, for example, be raised and lowered by lifting actuators, e.g. hydraulic cylinders.
- a measuring roller is located above the transport line of the primary material through the device for dividing and conveying out.
- the measuring roller is typically connected to a displacement measuring system to measure the deflection of the primary material.
- the tension in the starting material can be measured via the measuring roller and the connected position measuring system, so that the tension can be controlled by the electric drives of the stands of the subsequent finishing train.
- FIG. 2 shows a more detailed representation of the device for dividing and conveying out from FIG.
- FIG. 3 shows a schematic elevation of a device for dividing up and conveying out for a combined casting and rolling system according to the invention
- FIG. 4a shows a detailed representation of the device for dividing up and conveying out from FIG. 3 with the lifting device 11 in the closed, i.e. not unfolded, state
- FIG. 4b shows a detailed representation of the device for dividing and conveying out from FIG. 3 with the lifting device 11 in the closed, partially raised and completely raised state
- FIGS. 4a, 4b shows a representation of the lifting arm of the lifting device from FIGS. 4a, 4b in the closed state with the lifting actuator
- Fig. 6a...6d shows a schematic representation of the different phases when lifting the lifting arm 28 of the lifting device 11 from Figs. 3 to 5.
- FIG. 1 shows a combined casting and rolling plant 1 known from WO 2009/121678 A1 for producing a hot-rolled finished strip.
- an endless strand of slabs or thin slabs of a continuously cast starting material 3 is produced in a continuous casting machine 2 .
- the starting material 3 is supported, guided and cooled in the curved strand guide of the continuous casting machine 2 , so that the starting material 3 leaves the continuous casting machine 2 in the horizontal transport direction 7 on the roller table 4 .
- the starting material 3 is then pre-rolled in a roughing train 5 and runs through a device for dividing and conveying 6 in the undivided state, ie as an endless pre-strip, in the continuous operation of the combined casting and rolling plant 1 .
- the pre-strip is then heated to rolling temperature by a heating section 12 (eg an induction furnace), then descaled and in the Finish rolling mill 14 finish-rolled to the finished strip.
- the finished strip is then cooled down in the cooling section 15, then cut by the flying shears 16 and conveyed out of the combined casting and rolling plant 1 by the storage device 17, here two coilers.
- FIG. 2 the device for dividing and conveying out 6 from FIG. 1 is shown in more detail. If there is a fault in one of the devices for cutting and conveying 6 downstream, a strand section 21 is cut down from the endless starting material 3 by the first scissors 9b and the strand section 21 is raised by the lifting device 11 .
- the starting material 3 coming from the continuous casting machine 2 or the roughing mill 5 is cut into scrap pieces 19 by the first shears 9b.
- the pieces of scrap 19 can be taken up by a lowerable roller table 18 and are then conveyed out of the system. It is also possible by a second pair of scissors 9a - here a so-called.
- FIG. 3 shows a device for dividing and conveying out 6 for a combined casting and rolling plant 1 according to the invention.
- the second scissors 9a are pendulum scissors, as a result of which 3 preliminary material sections 10 can be cut out of the endless preliminary material and can be conveyed out of the system by means of the discharge device 8 .
- the first shears 9b are drum shears with two drums. If there is a fault in one of the plant sections downstream of the cutting and conveying device 6, for example an overflow (usually just called a cobble) in the finishing train, or a problem in the cooling section 15 or the storage device 17, the Recognizing the production interruption accelerates the first shears 9b, whereby the cutting of the endless pre-material 3 is initiated.
- the drums of the first shears 9b do not run continuously, but must be accelerated from a standstill. Both drums wear blades for cutting off the starting material 3.
- the moments of inertia of the drums and the transport speed of the starting material 3 the acceleration of the first shears 9a takes a certain amount of time. This means that the raw material cannot be cut immediately after the production interruption is detected.
- the starting material 3 which is still present in endless form, is clamped by a pair of clamping rollers 23 .
- the pair of clamping rollers that can be hydraulically adjusted to the primary material is after the Lifting device 11 arranged.
- the material By clamping the starting material 3, the material is squeezed so that it can then be bent more easily. Following this, the endless starting material 3 is lifted by means of the lifting device 11 .
- a strand section 21 is cut off the endless preliminary material 3 only after the preliminary material 3 has been lifted, as a result of which the following preliminary material 3 is separated from the strand section 21 .
- the cutting is done by cutting 27 of the first scissors 9b.
- a lowerable roller table 18 is arranged below the lifting arm 28 .
- FIG. 4a the area between the first scissors 9b and the pair of clamping rollers 23 from FIG. 3 is shown in more detail again.
- a measuring roller 26 is arranged above the transport line 34 (passline) of the starting material 3, which measures the deflection of the starting material 3 using a measuring system 33 shown in FIG.
- the main drives of the subsequent finishing train 14 can be regulated via the measuring roller 26 and the position measuring system 33, so that the starting material is present in continuous operation between the roughing train 5 and the finishing train 14 with almost no tension.
- FIG. 4b the different phases during the lifting of the starting material or the strand section are shown in more detail.
- a lifting actuator 29 e.g. a hydraulic cylinder
- FIG raised starting position see also Fig. 6a
- the inner section 28b of the lifting arm 28 encloses an acute angle of ⁇ 90° with the horizontal (see also FIG. 6b).
- the inner section 28b of the lifting arm 28 is raised further, so that it encloses a right angle to the horizontal (see also FIG. 6c). Only then is the outer portion 28a of the lifting arm 28 pivoted clockwise by the pivot drive 30 so that the outer portion 28a is aligned collinear with inner portion 28b (see also Figure 6d).
- FIG. 6a the state of the device for dividing and conveying out 6 is shown in continuous operation of the combined casting and rolling plant.
- the lifting arm 28 of the lifting device 11 is in the unraised state and the transport line 34 of the starting material 3 runs horizontally.
- the cutting of the endless primary material 3 is initiated by means of the first shears 9b and the pair of clamping rollers 23 is clamped (see arrow at the pair of clamping rollers, which represents the clamping).
- the starting material 3 is already being clamped by the pair of clamping rollers 23 and the inner section 28a of the lifting arm is being lifted. Since the primary material 3 is still present in an uncut state, the cooled pipe 20, which is below the pass line when the lifting device 11 is closed, takes the primary material 3 upwards with it. The swivel drive 30 is depressurized during lifting, so that the outer section 28a of the lifting arm is not collinear with the inner section 28b.
- FIG. 6c shows the situation after the starting material 3 has been cut off by the first shears 9b.
- a strand section 21 is cut down from the starting material 3 and is essentially without tension.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA50468/2021A AT524538B1 (de) | 2021-06-09 | 2021-06-09 | Überbrückung einer Produktionsunterbrechung in einer Gieß-Walz-Verbundanlage |
| PCT/EP2022/061187 WO2022258254A1 (de) | 2021-06-09 | 2022-04-27 | Überbrückung einer produktionsunterbrechung in einer giess-walz-verbundanlage |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4351813A1 true EP4351813A1 (de) | 2024-04-17 |
| EP4351813C0 EP4351813C0 (de) | 2025-08-06 |
| EP4351813B1 EP4351813B1 (de) | 2025-08-06 |
Family
ID=81850718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22726029.6A Active EP4351813B1 (de) | 2021-06-09 | 2022-04-27 | Überbrückung einer produktionsunterbrechung in einer giess-walz-verbundanlage |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250108420A1 (de) |
| EP (1) | EP4351813B1 (de) |
| CN (1) | CN117460585A (de) |
| AT (1) | AT524538B1 (de) |
| WO (1) | WO2022258254A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118719805A (zh) * | 2024-07-30 | 2024-10-01 | 二重(德阳)重型装备有限公司 | 快速分切处理废带钢的装置及方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1905281A1 (de) * | 1969-02-04 | 1970-08-06 | Schloemann Ag | Vorrichtung zum bartlosen Zerteilen von Brammen mittels einer ortsfesten Brennschneidzerteilanlage |
| JPS5545530A (en) * | 1978-09-25 | 1980-03-31 | Chiyoda Koutetsu Kogyo Kk | Direct rolling equipment for continuous casting having moving type continuous heating furnaces |
| DE102008003717B3 (de) * | 2008-01-09 | 2009-06-10 | Aute AG Gesellschaft für autogene Technik | Strangbrennschneidmaschine |
| AT506603B8 (de) | 2008-04-04 | 2010-03-15 | Siemens Vai Metals Tech Gmbh | Verfahren und vorrichtung für eine giess-walz-verbundanlage |
| KR101322090B1 (ko) * | 2011-11-15 | 2013-10-28 | 주식회사 포스코 | 스크랩 처리장치와, 이를 구비한 연연속 압연장치 및, 그 방법 |
| AT513298B1 (de) * | 2012-08-20 | 2017-03-15 | Primetals Technologies Austria GmbH | Zwischenstraßenbereich einer Gieß-Walz-Verbundanlage |
| AT513299B1 (de) | 2012-08-20 | 2016-04-15 | Primetals Technologies Austria GmbH | Verfahren und Vorrichtung für eine Gieß-Walz-Verbundanlage |
| WO2015110648A1 (de) * | 2014-01-27 | 2015-07-30 | Siemens Vai Metals Technologies Gmbh | GIEß-WALZ -VERBUNDANLAGE MIT SCHWENKBAREM ROLLGANGSABSCHNITT |
-
2021
- 2021-06-09 AT ATA50468/2021A patent/AT524538B1/de active
-
2022
- 2022-04-27 WO PCT/EP2022/061187 patent/WO2022258254A1/de not_active Ceased
- 2022-04-27 US US18/568,760 patent/US20250108420A1/en active Pending
- 2022-04-27 CN CN202280041446.1A patent/CN117460585A/zh active Pending
- 2022-04-27 EP EP22726029.6A patent/EP4351813B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022258254A1 (de) | 2022-12-15 |
| US20250108420A1 (en) | 2025-04-03 |
| CN117460585A (zh) | 2024-01-26 |
| AT524538A4 (de) | 2022-07-15 |
| EP4351813C0 (de) | 2025-08-06 |
| AT524538B1 (de) | 2022-07-15 |
| EP4351813B1 (de) | 2025-08-06 |
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