EP3826779A1 - Roll stand and method for cooling the upper working roll of a roll stand - Google Patents
Roll stand and method for cooling the upper working roll of a roll standInfo
- Publication number
- EP3826779A1 EP3826779A1 EP19740369.4A EP19740369A EP3826779A1 EP 3826779 A1 EP3826779 A1 EP 3826779A1 EP 19740369 A EP19740369 A EP 19740369A EP 3826779 A1 EP3826779 A1 EP 3826779A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- work roll
- upper work
- roll
- cooling liquid
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000110 cooling liquid Substances 0.000 claims description 69
- 239000002826 coolant Substances 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 8
- 239000012809 cooling fluid Substances 0.000 abstract 7
- 238000005096 rolling process Methods 0.000 description 18
- 239000000498 cooling water Substances 0.000 description 9
- 239000007921 spray Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
-
- 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
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
Definitions
- the invention relates to a roll stand with at least one upper work roll, at least one cooling device for cooling the upper work roll, with which cooling liquid can be applied to the upper work roll on the bale side, and at least one stripper which is brought up to the upper work roll on the bale side and with which the upper work roll advances outflowing coolant can be collected on the scraper and can be stripped from the upper work roll to form a coolant lake limited on one side by the upper work roll.
- the invention relates to a method for cooling the upper work roll of a roll stand, wherein the upper work roll is acted upon by a cooling liquid on the bale side and the cooling liquid flowing away from the upper work roll by means of a scraper brought up to the upper work roll on the bale side to form a one-sided through the upper work roll limited coolant lake on the scraper and is stripped from the upper work roll.
- a roll stand for rolling preferably for rolling hot rolling stock, has an upper work roll, a lower work roll and a roll gap between them.
- the work rolls are usually cooled with a cooling liquid during a rolling process.
- a wiper which is led laterally to the upper work roll is conventionally used, with which the cooling liquid flowing away from the upper work roll to form a one-sided through the upper work roll limited coolant lake is caught on the scraper and stripped from the upper work roll so that the rolling stock below it is not wetted.
- EP 0 313 516 A1 relates to a roll stand with a device for cooling rolls, in particular for continuous strip casting and for rolling metals, the rolls being covered with a hood, which extends from the area of the roll gap and extends over part of the roll surface and is sealed against the roll in which means for supplying a cooling medium to parts of the roll surface and for removing it, as well as a discharge or
- Suction device for liquid cooling medium collecting in the lower part of the hood are provided.
- several spray devices for the addition of an at least partially liquid cooling medium and means for removing this cooling medium from the roller surface are arranged in the axial direction over the entire length of the roll, individually or alternately, with end means for removing the cooling medium.
- EP 0 899 030 A2 relates to a device for cooling the work rolls of a roll stand, comprising, for each roll, a cooling water channel equipped with spray nozzles on a spray bar, and means for supplying cooling water or for removing heated water, and, in association with the upper work roll, one at an acute angle cooling water guide plate arranged to the surface of the rolling stock a front wiper assigned to the roller, and an approximately horizontal cooling water guide plate with a wiper assigned to the lower roller just below the level of the rolling stock.
- a cover plate is arranged to form a liquid-carrying gap, which is connected to a cooling water suction at its end facing away from the roller.
- At least one suction pipe is arranged underneath the lower cooling water guide plate, into which protrudes between the liquid-carrying corner area that results with the scraper and a surface area of the lower roller, and is connected to a cooling water suction device.
- JP H02 133 107 A discloses a roll stand with a device for cooling an upper work roll of the roll stand.
- the device has means for applying a cooling liquid to the upper work roll and means for sucking off the cooling liquid applied to the upper work rolls from the upper work roll.
- JP H03 161 105 A discloses a roll stand with a device for cooling a work roll of the roll stand.
- the device has an open chamber on the side of the work roll, into which a cooling liquid is sprayed onto the work roll, and suction lines connected to the side of the chamber, which are connected to a vacuum pump.
- JP S61 266 109 A discloses a roll stand with a device for cooling an upper work roll of the roll stand.
- the device applies coolant to the upper work roll on the bale side and has both a coolant supply and a coolant discharge.
- a scraper of the roll stand is brought up to the upper work roll, with which the cooling liquid flowing off the upper work roll can be wiped off the upper work roll.
- KR 201 1 098 048 A discloses a roll stand with a device for cooling an upper work roll of the roll stand.
- the upper work roll is by means of the Cooling device can be charged with a coolant on the bale side.
- the roll stand also has a scraper which is brought up to the upper work roll on the bale side and with which the cooling liquid flowing off the upper work roll can be caught on the scraper to form a cooling liquid lake bounded on one side by the upper work roll and can be stripped off the upper work roll.
- a drain opening is located on the scraper, through which the coolant can drain from the coolant lake from the scraper.
- a roll stand has at least one upper work roll, at least one cooling device for cooling the upper work roll, with which cooling liquid can be applied to the upper work roll on the bale side, and at least one stripper which is brought up to the upper work roll on the bale side and with which the wiper flowing away from the upper work roll Coolant can be collected on the scraper and can be stripped from the upper work roll to form a coolant lake limited on one side by the upper work roll.
- the cooling device has at least one water jet pump, which has a pressurized water inlet, which at least temporarily has a coolant supply is connected to the cooling device, and has an intake inlet that at least temporarily plunges into the cooling liquid lake.
- the cooling liquid for example a cooling water
- the cooling liquid lake on the scraper can be sucked off and removed thereby by means of the water jet pump, whereby the cooling liquid lake which is unnecessary or troublesome can possibly be almost completely reduced.
- an impairment of a spray pattern of a device used for spraying the cooling liquid in the direction of the upper work roll is not impaired by the cooling liquid lake.
- the reduction in the coolant lake ensures that the heated coolant contained in the coolant lake does not impair the desired cooling of the upper work roll.
- the present invention further improves the cooling efficiency of the upper work roll.
- the cooling liquid does not flow away from the stripper (on both sides) laterally or at the end faces of the roll, no outflow space described at the outset is required between the stripper and a delimitation of the roll stand.
- the maximum width, in particular the maximum bandwidth, of the rolled product is not restricted by the cooling device according to the invention.
- the length of the scraper given by the roll stand, transverse to the running direction of the rolling stock, can fully utilize the space that is limited, for example, by the roll stands and / or the lateral cheeks of an outlet guide. A longer wiper than conventional can therefore be used.
- the cooling liquid according to the invention does not flow off the wiper (on both sides) laterally or on the end face of the roll, it cannot get onto the edges, in particular strip edges, of the rolled product, so that the invention also prevents a consequent deterioration in the quality of the rolled product and thus allows a wider range in a given installation space.
- the suction of the coolant from the coolant lake according to the invention is also not critical to a possible suction of air.
- no external power input is required to operate the water jet pump, since the water jet pump is operated by means of the pressurized water of the coolant supply, which is already available.
- the suction of the cooling liquid from the cooling liquid lake according to the invention is also insensitive to contaminated cooling liquid or to particles in the sucked-in cooling liquid and is therefore very low-maintenance, permanent and inexpensive to operate.
- the cooling liquid can be supplied to the pressurized water inlet of the water jet pump, for example, at a pressure which is greater than 3 bar, preferably greater than 5 bar, and is particularly preferably between 10 bar and 15 bar.
- the pressure at the suction inlet of the water jet pump results from the ambient pressure and the pressure of the cooling liquid lake, which is negligible and is approximately 0 bar.
- a quantity of coolant between 100 m 3 / h and 900 m 3 / h can be applied to the upper work roll.
- the amount of coolant branched off for the operation of the water jet pump can be, for example, about 10% to about 20% of the total amount of coolant supplied to an injection unit of the cooling device.
- the cooling device can have at least one cooling bar, which is arranged laterally next to the upper work roll with respect to a longitudinal center axis of the upper work roll and by means of which the cooling liquid can be sprayed in the direction of the upper work roll, as a result of which the coolant can be applied laterally to the upper work roll.
- the chilled beam can be arranged to be adjustable in height.
- the water jet pump or its pressurized water inlet and / or suction inlet can be connected to the coolant supply of the cooling device continuously or temporarily. In the second alternative, the water jet pump can be operated as required by temporarily using the water jet pump via at least one switching valve or the like
- Coolant supply is connected.
- the water jet pump itself is, however, a self-regulating system which basically does not require any control and / or regulation and also does without valve technology and the like.
- the cooling device can also have two or more water jet pumps arranged distributed over the width of the upper work roll.
- the scraper is held by means of a scraper holder and can be arranged to be adjustable relative to the upper work roll.
- the stripper is arranged inclined, its end section facing the upper work roll being arranged geodetically lower than its end section facing away from the upper work roll.
- a basin is formed between the upper work roll and the scraper, in which the coolant lake is formed.
- the scraper can have lateral cheeks that delimit the basin on opposite sides and prevent the coolant from flowing away laterally from the scraper on both sides.
- the rolling stand can in particular be a hot rolling stand.
- the rolling stand can be used, for example, for rolling metallic, preferably iron-containing or aluminum-containing rolling stock.
- the roll stand can have additional rolls supporting the work rolls.
- the water jet pump is at least partially arranged within a cooling beam of the cooling device, with which the cooling liquid can be applied to the upper work roll.
- a cooling beam of the cooling device with which the cooling liquid can be applied to the upper work roll.
- an outlet of the water jet pump or an outlet of a liquid line communicating with the outlet of the water jet pump is arranged geodetically lower than the cooling liquid lake.
- the water jet pump can first be connected to the coolant supply by means of at least one electrically controllable switching valve and can be separated from the coolant supply after the initial suction.
- the liquid line can be designed as a rigid tube or as a flexible hose.
- a cooling liquid is applied to the upper work roll and the cooling liquid flowing off from the upper work roll by means of a scraper led laterally to the upper work roll to form a cooling liquid lake on one side delimited by the upper work roll on the stripper collected and stripped from the upper work roll, wherein the cooling liquid of the cooling liquid lake is pumped out using at least one water jet pump, and wherein a suction inlet of the water jet pump is immersed in the cooling liquid lake and a pressurized water inlet of the water jet pump is at least temporarily connected to a cooling liquid supply.
- the rolling stand can be used according to one of the above-mentioned configurations or a combination of at least two of these configurations with one another to carry out the method.
- the invention is explained by way of example with reference to the attached figure using a preferred embodiment, the features explained below, both individually and in combination with at least two of these features, can represent an advantageous or further developing aspect of the invention. It shows:
- Figure 1 a schematic representation of an embodiment for a rolling stand according to the invention
- FIG. 1 shows a schematic illustration of an exemplary embodiment of a roll stand 1 according to the invention with an upper work roll 2, a lower work roll 3 and a roll gap 4 provided between the work rolls 2 and 3.
- the direction of rotation of the work rolls 2 and 3 during a rolling process is indicated by arrows.
- the roll stand 1 naturally has further components which are not shown for the sake of clarity.
- the roll stand 1 also has a cooling device 5 for cooling the upper work roll 2, by means of which a cooling liquid 6 can be applied to the upper work roll 2 on the bale side.
- the cooling device 5 also has a cooling bar 7, which is connected to a cooling liquid supply (not shown) of the cooling device 5 and on which a plurality of spray nozzles 8 are arranged, by means of which the cooling liquid 6 is sprayed in the direction of the upper work roll 2.
- the roll stand 1 has an inclined scraper 9, which is guided on the bale side to the upper work roll 2, which is designed in the form of a plate and with which the cooling liquid 6 flowing away from the upper work roll 2 to form a cooling liquid lake 10 delimited on one side by the upper work roll 2 the stripper 9 can be caught and stripped from the upper work roll 2.
- the roll stand 1 also has a horizontally arranged, plate-shaped stripper 11 which is brought up to the lower work roll 3 on the bale side.
- the cooling device 5 has a water jet pump 12, which has a pressurized water inlet 13, which is at least temporarily connected to the cooling liquid supply of the cooling device 5, and a suction inlet 14 immersed in the cooling liquid lake 10.
- the liquid flow through the operated water jet pump 12 is indicated by arrows.
- the water jet pump 12 is partially arranged within the chilled beam 7.
- An output, not shown, of the water jet pump 12 can be arranged geodetically lower than the cooling liquid lake 10.
- an outlet 15 of a liquid line 16, indicated by a broken line and communicating with the outlet of the water jet pump 12 can be arranged geodetically lower than the cooling liquid lake 10.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018212168.0A DE102018212168A1 (en) | 2018-07-23 | 2018-07-23 | Roll stand and method for cooling the upper work roll of a roll stand |
PCT/EP2019/068990 WO2020020683A1 (en) | 2018-07-23 | 2019-07-15 | Roll stand and method for cooling the upper working roll of a roll stand |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3826779A1 true EP3826779A1 (en) | 2021-06-02 |
EP3826779B1 EP3826779B1 (en) | 2022-01-26 |
Family
ID=67303468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19740369.4A Active EP3826779B1 (en) | 2018-07-23 | 2019-07-15 | Roll stand and method for cooling the upper working roll of a roll stand |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3826779B1 (en) |
DE (1) | DE102018212168A1 (en) |
WO (1) | WO2020020683A1 (en) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2843449A1 (en) * | 1978-10-05 | 1980-04-10 | Juergen Volkmann | METHOD AND DEVICE FOR REMOVING OR DOSINGLY REDUCING ADHAESIVE LIQUID FILMS ON HARD SURFACES |
JPH0679727B2 (en) | 1985-05-20 | 1994-10-12 | 株式会社日立製作所 | Roll cooling device for rolling mill |
CH675974A5 (en) | 1987-10-23 | 1990-11-30 | Lauener Eng Ag | |
JPH07102373B2 (en) | 1988-11-09 | 1995-11-08 | 川崎製鉄株式会社 | Rolling roll cooling device |
JPH03161105A (en) | 1989-11-20 | 1991-07-11 | Kawasaki Steel Corp | Cooling device for rolling roll |
JPH0428407A (en) * | 1990-05-22 | 1992-01-31 | Ishikawajima Harima Heavy Ind Co Ltd | Device for controlling surface shape of rolling roll |
JPH06339712A (en) | 1993-05-31 | 1994-12-13 | Mitsubishi Heavy Ind Ltd | Device for discharging roll coolant for rolling mill |
DE19737735A1 (en) | 1997-08-29 | 1999-03-04 | Schloemann Siemag Ag | Device and method for cooling the work rolls of a roll stand on the outlet side |
DE10110026A1 (en) * | 2001-03-01 | 2002-09-12 | Mueller Weingarten Maschf | Roll cleaning system for strip lines comprises straight or spiraled grooved roller in housing in roll contact area with grooves fed with regulatable cleaning fluid. |
KR20110098048A (en) | 2010-02-26 | 2011-09-01 | 현대제철 주식회사 | Stripper for rolling mill |
DE102016223131A1 (en) | 2016-09-06 | 2018-03-08 | Sms Group Gmbh | Apparatus and method for applying a liquid medium to a roll and / or to a rolling stock and / or for removing the liquid medium |
-
2018
- 2018-07-23 DE DE102018212168.0A patent/DE102018212168A1/en not_active Withdrawn
-
2019
- 2019-07-15 WO PCT/EP2019/068990 patent/WO2020020683A1/en active Search and Examination
- 2019-07-15 EP EP19740369.4A patent/EP3826779B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE102018212168A1 (en) | 2020-01-23 |
EP3826779B1 (en) | 2022-01-26 |
WO2020020683A1 (en) | 2020-01-30 |
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