WO2014047746A1 - 一种双辊薄带连铸辊面清理方法和装置 - Google Patents
一种双辊薄带连铸辊面清理方法和装置 Download PDFInfo
- Publication number
- WO2014047746A1 WO2014047746A1 PCT/CN2012/001313 CN2012001313W WO2014047746A1 WO 2014047746 A1 WO2014047746 A1 WO 2014047746A1 CN 2012001313 W CN2012001313 W CN 2012001313W WO 2014047746 A1 WO2014047746 A1 WO 2014047746A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roll
- roller
- casting
- brush
- bristles
- Prior art date
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Classifications
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- 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
- B22D11/16—Controlling or regulating processes or operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
Definitions
- Double roll thin strip continuous casting roll surface cleaning method and device Double roll thin strip continuous casting roll surface cleaning method and device
- the present invention relates to continuous casting techniques, and more particularly to a method and apparatus for cleaning a roll surface of a twin roll strip casting. Background technique
- the twin-roll strip casting process differs from the traditional continuous casting method in that molten steel is cast directly into a molten pool surrounded by two relatively rotating and rapidly cooled casting rolls and side seals.
- the circumferential surface of the rotation of the roller is cooled and solidified, thereby forming a solidified shell and gradually growing and then being squeezed together at the minimum of the gap between the two casting rolls, and finally a thin strip of thick metal is formed at the outlet opening, and the strip passes through 1- After 2 passes of hot rolling, it is fed into the crimper and crimped.
- the method does not require multiple hot rolling processes, which greatly simplifies the thin strip production process and reduces equipment investment.
- the solidification time of the metal in the whole production process is relatively short, the grain refinement of the thin strip continuous casting product, the strength of the material, and the elongation of the toughness are improved, and the solidification speed is also favorable for suppressing the segregation of the element.
- the twin-roll strip continuous casting casting roll is made of copper alloy, and the surface is coated with metal (Cr) or metallic nickel (Ni).
- the surface of the casting roll is textured, and the surface after the graining has a certain number of pits. Or groove.
- the roller surface is regularly distributed with pits and protrusions of a certain depth and height, and the molten steel is solidified with the projections to facilitate the casting.
- the belt quality reduces the surface quality defects of the cast strip caused by the uneven solidification of the molten steel in the molten pool.
- the double-roll thin strip continuous casting machine uses the brush roller to clean the roll surface.
- the brush roll has various forms, and the method of acting on the roll surface of the casting roll is also different.
- the brush roller is used to clean the adhesive particles on the casting rolls.
- a roll surface cleaning device mentioned in the Chinese patent CN200420107544.X uses a metal scraper to adhere to the roll surface to scrape the roll surface residue, and uses the spring at the rear of the scraper to provide a topping force. This The method has a severe wear on the roll surface of the casting rolls, and is structurally restricted to remove minute metal oxides on the roll surface.
- a row of brushes is placed in parallel on the surface of the casting rolls, and the rotation of the casting rolls is such that the brushes can be moved axially, and the two forms a relative movement to achieve the effect of cleaning the rolls.
- the object of the present invention is to provide a double roll thin strip continuous casting roll surface cleaning method and device.
- the cleaning effect of the thin strip continuous casting casting roll is improved by using a reasonable cleaning method and device.
- to make the roller surface thermal conductivity uniform improve the quality of the cast strip.
- the present invention is applicable to a metal cast strip having a thickness of 1.5 to 5 mm by a twin roll type thin strip continuous casting machine.
- a double-roll thin strip continuous casting roll surface cleaning method wherein each casting roll of the double-roll thin strip continuous casting machine uses two upper and lower brush rollers to clean the surface thereof, wherein at least one of the brush rolls is rotated and the casting roll
- the rotation direction is the same, the linear speed of the casting rolls is constant and greater than the rotation speed of the casting rolls, and the roll surface cleaning device controls the distance or pressure between the brush roller and the casting rolls through a position control device fixed on the casting roll chock;
- the brush roller is close to the surface of the casting roll and starts the cleaning work.
- the roll surface cleaning device adjusts the displacement according to the expansion amount of the casting roll to maintain a constant pressure between the brush roll and the casting roll;
- the bristles of the brush roller are pressed against the surface of the casting roller under the action of the driving position control device, and the macroscopically, the brush roller is partially crushed, and the minimum amount of the brush roller is the brush roller.
- the difference between the diameter r and the minimum diameter after flattening, ie: the amount of crushing Ar r- rmin , in mm, which is between 1 and 10 times the average pit depth of the textured roll surface after texturing between, i.e., ⁇ ⁇ ⁇ (1-10) -R c , an average roll surface recess Using the average depth of the surface profile of the line roller unit height ⁇ to measure;
- the upper and lower brush rollers are simultaneously rotated close to the roller surface, and the rotation speed of the lower roller at this time is 0.2-0.5 times of the rotation speed of the upper roller, and the rotation speed of the upper roller is 1.5 of the rotation speed of the casting roller.
- the clearance speed of the upper roller is 1.5-3 times of the rotation speed of the casting roller; when the casting operation is about to end, the flow system stops supplying molten steel, and the lower brush roller is rotated close to the roller surface, and the lower roller rotation speed is
- the rotation speed of the upper roller is 0.2-0.5 times, the rotation speed of the upper roller is 1.5-3 times of the rotation speed of the casting roller, and the pressure of the lower roller acting on the roller surface is 1-2 times of the pressure of the upper roller acting on the roller surface.
- the unit pressure of the roller on the casting rolls is 0.1-2.5 MPa.
- the diameter of the upper roller of the brush roller is thinner and longer than that of the lower roller, the diameter of the upper roller is ⁇ 0.06- ⁇ 0.28 ⁇ , the diameter of the lower roller is ⁇ 0.2- ⁇ 0.4 ⁇ ; the length of the lower roller is 20-50mm The upper roller has a length of 40-60mm.
- the length of the bristles on the same brush roll is equal or unequal, and the bristles are uniformly distributed throughout the brush roll.
- the brush roller bristles are made of copper wire or stainless steel wire.
- the double-roll thin strip continuous casting roll surface cleaning device of the invention comprises, wherein each of the casting rolls is provided with two upper and lower brush rolls, the length of the brush roll is greater than the length of the roll surface of the casting roll, and the two brush rolls are mounted on the casting roll On the outer side, the axis of the brush roller is parallel to the axis of the casting roller, the inner side of the casting roller faces the molten pool, and the upper and lower brush rollers are respectively arranged symmetrically above and below the center line of the casting roller; the bearing seats supported at the two ends of the brush roller pass
- the position control device is connected to the bearing seat of the casting roller, one end of the brush roller is connected with the reducer and the motor; a displacement sensor is arranged in the position control device of the brush roller, and the distance between the brush roller and the surface of the casting roller is monitored.
- the pressure acting on the bristles is controlled, and the displacement sensor is electrically connected to the strip casting control mechanism.
- the diameter of the upper brush roller is thinner and longer than that of the lower brush roller.
- the diameter of the upper brush roller is ⁇ 0.06- ⁇ 0.28 ⁇ , and the diameter of the lower brush roller is ⁇ 0.2- ⁇ 0.4 ⁇ ;
- the length of the bristles is 20-50mm, and the length of the upper brush roller is 40-60mm.
- the length of the bristles on the same brush roller is equal or unequal length, and the bristles are distributed uniformly across the entire brush roller to maintain the cleaning effect of the brush roller.
- the bristles of the brush roller are made of copper wire or stainless steel wire.
- Each of the casting rolls of the twin-roll strip casting machine will use two brush rolls to clean the surface. At least one of the brush rolls has the same direction of rotation as the casting rolls, and the linear speed of the casting rolls is constant and greater than the speed of the casting rolls.
- the roll surface cleaning device controls the distance or pressure between the brush roller and the casting roll by a position control device fixed to the casting roll chock.
- the casting roll is made of a copper alloy, and the surface is coated with metallic chromium (Cr) or metallic nickel (Ni). The surface of the casting roll is textured, and the surface of the casting is distributed to a certain depth and height.
- the pits and the bulges, the molten steel and the protrusions are solidified, which is beneficial to improve the quality of the cast strip and reduce the surface quality defects of the cast strip caused by the uneven solidification of the molten steel in the molten pool.
- the brush roller is close to the roll surface of the casting roll and begins to clean up.
- the roll surface cleaning device adjusts the displacement according to the expansion amount of the casting roll to maintain a constant pressure between the brush roll and the casting roll; as the brush roll is gradually shortened, it acts on the casting roll. The pressure is gradually lowered, and the rotational angular velocity of the brush roller is correspondingly increased.
- the brush roll of the suitable roll cleaning device is selected, and the rotation speed of the same side brush roller and the diameter of the bristles are different, and the application strategies in the casting process are also different. The details will be described below.
- the twin-roll strip casting process directly casts molten steel through a cloth flow system in a molten pool surrounded by two relatively rotating and rapidly cooled casting rolls and side sealing plates, and the molten steel is in the casting rolls.
- the rotating circumferential surface is cooled and solidified, thereby forming a solidified shell and gradually growing and then being squeezed together at the minimum of the gap between the two casting rolls, and finally a thick metal strip is formed at the exit opening, and the strip passes through 1- After 2 passes of hot rolling, it was fed to a coiler for crimping.
- the casting rolls are made of copper alloy and have a coating of metallic chromium (Cr) or metallic nickel (Ni).
- the surface of the casting rolls is textured, and the surface of the casting is regularly distributed with pits and protrusions of a certain depth and height. After the molten steel is solidified in contact with the protrusions, the quality of the cast strip is improved, and the surface quality defects of the cast strip caused by the uneven solidification of the molten steel in the molten pool are reduced.
- each of the casting rolls of the casting machine uses two rotating brush rolls to clean the surface thereof, at least one of which has the same direction of rotation as the casting rolls.
- the roll surface cleaning device adjusts the displacement according to the expansion amount of the casting roll and the wear of the bristles to ensure the cleaning effect of the surface of the casting roll.
- the bristles of the brush roll are gradually shortened, and under the action of the position control device, the pressure of the brush roll on the casting roll is kept constant, and the built-in displacement sensor of the position control device of the brush roll records the bristles.
- the amount of wear and feedback to the casting machine control system the latter will issue a command to change the angular velocity of the brush roller accordingly, and maintain the linear velocity of the outer circumference of the brush roller Evenly.
- the bristles of the brush roll are pressed against the roll surface of the casting roll under the action of the position control device, and the macroscopic representation is that the brush roll is partially flattened, and the minimum flattening amount of the brush roll is defined in the present case.
- the flattened roll surface should be between 1 and 10 times the average pit depth of the textured caster roll surface, ie ⁇ ⁇ ⁇ (1 - 10), R e , the average pit depth of the roll surface is measured by the roll The average line height R e of the face contour unit is measured;
- the upper and lower rolls of the roll surface cleaning device are simultaneously rotated close to the roll surface, and the lower roll rotates at a speed of 0.2-0.5 times of the upper roll rotation speed, and the upper roll rotates at the casting roll.
- the speed is 1.5-3 times; and the pressure of the lower roller acting on the roller surface is greater than the pressure of the upper roller acting on the roller surface 1-2 times.
- the lower roll of the roll cleaning device is separated from the contact surface of the casting roll to maintain a fixed distance of about 0.1-lmm to prevent accidental generation of large-sized metal oxides from being re-entered into the molten pool.
- Upper roll At this time, the rotational speed of the upper roller is 1.5 to 3 times the rotational speed of the casting roller.
- the flow system stops supplying molten steel at this time, and the lower roller of the roller surface cleaning device is rotated close to the roller surface, and the lower roller rotates at a speed of 0.2-0.5 times of the upper roller rotation speed.
- the rotational speed is 1.5-3 times the rotational speed of the casting rolls.
- the pressure of the lower roller acting on the roll surface is 1-2 times the upper roll acting on the roll surface pressure.
- the unit pressure of the upper roll on the casting rolls is 0.1-2.5 MPa.
- the definition of the stable casting stage in this paper is the casting process after 1-7 minutes after the start of casting, at which time the parameters of the strip casting machine remain stable.
- the installation position between the brush roller and the casting roller is relatively fixed, and the control reference is uniform.
- FIG. 1 is a schematic view showing the cleaning of a roll strip of the present invention.
- FIG. 2 is a schematic structural view of a roll surface cleaning device of the present invention.
- Figure 3 is a plan view of Figure 2.
- Fig. 4 is a schematic view showing the calculation of the rolling amount of the roller brush of the present invention. detailed description
- each of the casting rolls 10, 10' of the twin roll strip casting machine adopts two upper and lower sets, which are opposite to the rotating direction of the casting rolls.
- the brush roller 1, ⁇ , 2, 2' cleans the surface
- the linear speed of the casting roller is constant and larger than the casting roller speed
- the roller surface cleaning device controls the brush roller and the casting roller through a position control device fixed on the casting roller bearing housing The distance between the pressure and the pressure.
- the brush roller is close to the roll surface of the casting roll and begins to clean.
- the roll surface cleaning device adjusts the displacement according to the expansion amount of the casting roll to maintain a constant pressure between the brush roll and the casting roll. .
- the bristles of the brush roller are bent on the surface of the casting roll by the action of the position control device, and the macroscopic representation is that the brush roll is partially crushed, and the minimum amount of the brush roll is the brush.
- the difference between the roll diameter r and the minimum diameter r mm after flattening, ie: the amount of crushing Ar r - rmin , in mm, the amount of crushing is between 1 and 1 of the average pit depth of the textured roll surface after texturing Between 10 times, ie ⁇ ⁇ (1 -1 0)
- the average pit depth of the roll surface is measured by the average line height R e of the roll profile unit; before the start of the casting operation, the upper and lower brush rolls are simultaneously close to the roll face And rotating, at this time, the rotation speed of the lower roller is 0.2-0.5 times of the rotation speed of the upper roller, and the rotation speed of the upper roller is 1.5-3 times of the rotation speed of the casting roller; and the pressure of the lower roller acting on the roller surface is
- the flow system stops supplying molten steel, and the lower brush roller is rotated close to the roll surface.
- the lower roll rotates at a speed of 0.2-0.5 times of the upper roll rotation speed
- the upper roll rotates at the casting roll.
- the rotation speed is 1.5-3 times
- the pressure of the lower roller acting on the roller surface is 1-2 times the pressure of the upper roller acting on the roller surface
- the unit pressure of the upper roller acting on the casting roller is 0.1-2.5 MPa.
- the diameter of the bristles of the upper roller of the brush roller is thinner and longer than that of the lower roller, and the diameter of the upper roller bristles is ⁇ 0.06- ⁇ 0.28 ⁇ , the diameter of the lower roll bristles is ⁇ 0.2- ⁇ 0.4 ⁇ ; the length of the lower roll bristles is 20-50mm, and the length of the upper roll bristles is 40-60mm.
- the length of the bristles on the same brush roll is equal or unequal, and the bristles are uniformly distributed throughout the brush roll.
- the brush roller bristles are made of copper wire or stainless steel wire.
- the double-roll thin strip continuous casting roll surface cleaning device of the present invention comprises two upper and lower brush rolls 1, 2, 2, and a brush for each casting roll 10, 10'.
- the length of the roller is larger than the length of the roll surface of the casting roll, and the two brush rollers are installed on the outer side of the casting rolls 10, 10'.
- the axis of the brush roll is parallel to the axis of the casting roll, and the inner side of the casting roll faces the molten pool 20, and the upper and lower brush rolls 1 , ⁇ , 2, 2' are symmetrically placed above and below the center line of rotation of the casting rolls 10, 10'; support the brush holders 1, ⁇ , 2, 2, the bearing seats 3, 3 ', 4, 4 at both ends ' Connected to the bearing housings 30, 30 of the casting rolls 10, 10' by the drive hydraulic cylinders 5, 5', 6, 6, on one end of the brush roller 1, ⁇ , 2, 2, with the reducer and motor 7 , V, 8, 8' are connected; the displacement sensor 9 and 9' are arranged in the driving hydraulic cylinder of the brush roller, and the displacement sensor is electrically connected to the thin strip continuous casting control mechanism.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Cleaning In General (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2012/001313 WO2014047746A1 (zh) | 2012-09-27 | 2012-09-27 | 一种双辊薄带连铸辊面清理方法和装置 |
KR1020157007705A KR20150048203A (ko) | 2012-09-27 | 2012-09-27 | 트윈-로울러 박판 스트립 주조로울러의 표면 세정방법 및 장치 |
US14/429,735 US9770756B2 (en) | 2012-09-27 | 2012-09-27 | Method and device for cleaning a surface of a twin-roller continuous thin strip casting roller |
JP2015533390A JP6162247B2 (ja) | 2012-09-27 | 2012-09-27 | 双ロール式薄ストリップ連続鋳造ロールの表面の清掃の方法および装置 |
EP12885417.1A EP2902134B1 (en) | 2012-09-27 | 2012-09-27 | Method and apparatus for cleaning twin-roller, thin band, continuous casting roller face |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2012/001313 WO2014047746A1 (zh) | 2012-09-27 | 2012-09-27 | 一种双辊薄带连铸辊面清理方法和装置 |
Publications (1)
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WO2014047746A1 true WO2014047746A1 (zh) | 2014-04-03 |
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Family Applications (1)
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PCT/CN2012/001313 WO2014047746A1 (zh) | 2012-09-27 | 2012-09-27 | 一种双辊薄带连铸辊面清理方法和装置 |
Country Status (5)
Country | Link |
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US (1) | US9770756B2 (zh) |
EP (1) | EP2902134B1 (zh) |
JP (1) | JP6162247B2 (zh) |
KR (1) | KR20150048203A (zh) |
WO (1) | WO2014047746A1 (zh) |
Cited By (7)
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WO2018119551A1 (zh) * | 2016-12-26 | 2018-07-05 | 宝山钢铁股份有限公司 | 铸辊辊面清理装置和方法 |
CN110038831A (zh) * | 2019-04-24 | 2019-07-23 | 万威 | 一种清洗效果好的圆柱形铸件清洗装置 |
CN112157230A (zh) * | 2020-09-07 | 2021-01-01 | 东北大学 | 一种双辊薄带连铸辊面清理装置 |
CN112157229A (zh) * | 2020-09-07 | 2021-01-01 | 东北大学 | 一种薄带连铸的辊面清理装置及其控制方法和控制装置 |
CN112643004A (zh) * | 2019-10-10 | 2021-04-13 | 青岛正望钢水控制股份有限公司 | 一种双辊薄带连铸用浇铸***及布流水口 |
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KR101899672B1 (ko) * | 2016-12-15 | 2018-09-17 | 주식회사 포스코 | 브러쉬 롤 장치와 이를 사용하는 박판 주조 장치 |
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US10975908B1 (en) * | 2019-10-29 | 2021-04-13 | Schaeffler Monitoring Services Gmbh | Method and device for monitoring a bearing clearance of roller bearings |
CN112058730A (zh) * | 2020-07-24 | 2020-12-11 | 张家港扬子江冷轧板有限公司 | 一种可移动清理辊面的刷辊及使用方法 |
CN115228789B (zh) * | 2022-09-23 | 2022-12-20 | 济南和拓自动化科技有限公司 | 刷辊式清洁*** |
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KR20150048203A (ko) | 2015-05-06 |
JP6162247B2 (ja) | 2017-07-12 |
EP2902134A4 (en) | 2016-06-08 |
EP2902134A1 (en) | 2015-08-05 |
US20150231693A1 (en) | 2015-08-20 |
JP2015530256A (ja) | 2015-10-15 |
EP2902134B1 (en) | 2018-06-20 |
US9770756B2 (en) | 2017-09-26 |
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