EP3810347A1 - Method and roll stand for rolling a material to be rolled - Google Patents
Method and roll stand for rolling a material to be rolledInfo
- Publication number
- EP3810347A1 EP3810347A1 EP19734011.0A EP19734011A EP3810347A1 EP 3810347 A1 EP3810347 A1 EP 3810347A1 EP 19734011 A EP19734011 A EP 19734011A EP 3810347 A1 EP3810347 A1 EP 3810347A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- emulsion
- roll
- friction
- roller drive
- droplet size
- 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
- 238000005096 rolling process Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 title abstract description 4
- 239000000839 emulsion Substances 0.000 claims abstract description 78
- 239000000314 lubricant Substances 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005097 cold rolling Methods 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 claims description 2
- 239000010731 rolling oil Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
-
- 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
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0242—Lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/10—Motor power; motor current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/10—Motor power; motor current
- B21B2275/12—Roll torque
Definitions
- the invention relates to a method and a rolling stand for rolling, in particular for cold rolling, rolled material, in particular metal strip, furthermore in particular steel strip.
- Roll stands and methods for their operation are well known in the prior art. Furthermore, it is known to lubricate steel strip in particular with emulsions before it enters the roll gap of a roll stand. When lubricated with an emulsion, i.e. H. With a mixture of water and a lubricant, it is known to suitably adjust the optimal friction conditions in the roll gap by applying emulsions with different concentrations of lubricant to the top and bottom of the rolling stock.
- the individual setting of lubricant concentrations in emulsions for the top and bottom of a rolling stock is known for example from WO 2013/120750. Furthermore, it is known to connect the upper and lower spray nozzles on the input side of a roll stand with mixers or atomizing devices which are designed to adjust the droplet size of the emulsion applied to the rolling stock by the spray nozzles as a function of rolling conditions. The droplet size preset in this way applies equally to the top and bottom of the rolling stock; see JP 5076920 A.
- this method is characterized by the following steps: determining a possible size difference between the friction between the upper work roll and the top of the rolling stock and the friction below between the lower work roll and the underside of the rolling stock and reducing the droplet size of the first emulsion and / or increasing the Droplet size of the second emulsion as long as the friction above is greater than the friction below; and vice versa.
- top friction and “bottom friction” are to be understood as defined in claim 1.
- first emulsion denotes the emulsion that is sprayed onto the upper work roll and / or onto the top of the rolling stock.
- second emulsion denotes the emulsion which is sprayed onto the lower work roll and / or onto the underside of the rolling stock.
- roll stand means in particular a duo, quarto or six-high roll stand.
- an upper roll drive is provided for driving the upper work roll, an upper intermediate roll or an upper backup roll; and a lower roller drive is provided for Driving the lower work roll, an upper intermediate roll or an upper backup roll.
- the friction in the roll gap can be reduced; conversely, increasing the size of the droplets increases the friction.
- the expression “and vice versa” at the end of claim 1 means an alternative for the last process step as follows: increasing the droplet size of the first emulsion and / or reducing the droplet size of the second emulsion as long as the friction at the top is smaller than the friction at the bottom.
- the claimed optimum setting of the friction conditions in the roll gap ie the desired balance between the friction above and the friction below primarily through a suitable change in the droplet size offers the advantage that this procedure is cheaper than changing the concentration of the lubricant in the emulsion.
- Lubricant is fundamentally expensive and should advantageously be reduced to a minimum amount both for reasons of price and to avoid unnecessary pollution of the environment.
- the claimed setting of the friction conditions in the roll gap as a result of the claimed change in the droplet size is advantageous, since this procedure does not require the unnecessary use of lubricants, ie there is also no unnecessary discharge of lubricants over the finished rolled strip surface. This has a positive effect on band cleanliness.
- the compensation of the frictional relationships between the upper work roll and the top of the belt and the lower work roll and the underside of the belt basically, ie regardless of whether it is caused by a change in the oil concentration or by a change in the droplet size, advantageously influences the torque. Warpage as well as chatter problems in the roll stand and also enables any expansion of the product range for certain roll stands.
- differences between the friction at the top and the friction at the bottom are determined as the difference between the torque generated by the upper roller drive and the torque generated by the lower roller drive.
- the first exemplary embodiment provides that the droplet size of the first emulsion is reduced and / or the droplet size of the second emulsion is increased as long as that generated by the upper roller drive Torque M1 is greater than the torque M2 generated by the lower roller drive; and vice versa.
- a possible difference in friction between the friction above and the friction below can also be determined representatively as the difference between the current flowing through the upper roller drive and the current flowing through the lower roller drive.
- the droplet size of the first emulsion must be reduced and / or the droplet size of the second emulsion must be increased as long as the current flowing through the upper roller drive is greater than the current flowing through the lower electric roller drive; and vice versa.
- the method according to the invention primarily provides for an adaptation of the friction above to the friction below by a suitable change in the droplet size of the first and the second emulsion, as just described.
- This attempted equalization of the friction is preferably carried out with the initially preset minimum concentration of the lubricant in the first and the second emulsion, as mentioned, for reasons of cost in order to keep the costs for the lubricant as low as possible.
- the concentration of the lubricant in the first and / or in the second emulsion can also be changed, in particular if the friction conditions change due to a change in the Do not allow the droplet size to be adjusted sufficiently on its own.
- the concentration of the lubricant in at least one of the two emulsions can then be increased in order to reduce the friction even further if a further reduction in the droplet size is no longer possible; and vice versa.
- a single figure is attached to the invention, which shows the roll stand with various components for the application of emulsions.
- the invention is described in detail below with reference to this figure in the form of exemplary embodiments.
- the figure shows a roll stand 100 for rolling, in particular for cold rolling, a rolling stock 200, in particular a metal strip.
- the roll stand comprises an upper and a lower work roll 140-1, 140-11, which span a roll gap for rolling the rolling stock 200.
- the said work rolls can each be supported by support rolls.
- Upper spray nozzles 130-11 are assigned to the roll stand for spraying a first emulsion onto the upper work roll 140-1 and / or onto the top of the rolling stock 200 on the entry side E of the roll stand 100.
- lower spray nozzles 130-11 are provided for spraying a second one Emulsion on the lower work roll 140-11 and / or on the underside of the rolling stock 200, also on the entry side E of the roll stand.
- the roller can be driven directly or indirectly by dragging an adjacent driven roller.
- a first mixing device 110-1 which mixes water from a water tank 180 in a predetermined mixing ratio with a lubricant, for example rolling oil or kerosene from a lubricant tank 190, to produce the first emulsion.
- the first emulsion thus provided at the outlet of the upper mixing device 110-1 is fed to a downstream upper atomizer device 120-1, which is designed to set the droplet size of the first emulsion as a function of a first actuating signal S1 before the emulsion is fed to the upper spray nozzle 130-1 becomes.
- An analog mixing device 110-11 and atomizer device 120-11 are provided for generating the second emulsion and for adjusting the droplet size in the second emulsion in response to a second actuating signal S2.
- the second emulsion produced in this way is subsequently fed to the lower spray nozzle 130-11.
- the upper work roll 140-1 is driven by an upper roll drive 160-1 via, for example, a spindle.
- the lower work roll 140-11 is driven by a lower roll drive 160-1 via a spindle, for example.
- a determining device 170 is provided for determining a (size) difference AR between the friction at the top between the upper work roll 140-1 and the top of the rolling stock 200 and the friction at the bottom between the lower work roll 140-11 and the underside of the rolling stock 200.
- a control device 150 is further provided for generating a first actuating signal S1 for the upper atomizer device 120-1 and one second control signal S2 for the lower atomizing device 120-11 as a function of the possible difference AR between the friction above and the friction determined by the determining device 170.
- the control device 150 generates the first actuating signal S1 for the upper atomizing device 120-1 in such a way that the droplet size for the first emulsion is reduced and / or the second actuating signal S2 for the lower atomizing device 120-11 so that the droplet size for the second emulsion is increased as long as the friction above is greater than the friction below.
- control device 150 can also form the first actuating signal S1 and the second actuating signal S2 in such a way that the droplet size of the first emulsion is increased and / or the droplet size of the second emulsion is reduced as long as the friction at the top is smaller than the friction at the bottom.
- the (possibly different) adjustment of the droplet size at the top and bottom always aims to compensate for the friction at the top and bottom, i. H. the friction at the top and the friction at the bottom should be or be the same size.
- the present invention basically provides two alternatives for forming a determination device.
- the determination device 170 has a first torque measuring device 172-1 for measuring the torque M1 generated by the upper roller drive 160-1 and a second one
- Torque measuring device 172-11 for measuring the torque M2 generated by the lower roller drive 160-11.
- the determination device 170 has a calculation device 176 for calculating the size difference AR between the friction above and the friction below, representative of the difference between the torque M1 generated by the upper roller drive and that generated by the lower roller drive Torque M2. The difference is calculated, for example, as a difference or as a quotient between the two torques M1 and M2.
- the control device 150 generates the two control signals S1 and S2 for the upper and the lower atomizing device 120-1, 120-11 as a function of the calculated difference between the torques M1 and M2. Specifically, the control device 150 is then designed to generate the control signals S1, S2 in such a way that the droplet size generated by the upper atomizing device 120-1 for the first emulsion is reduced and / or the droplet size generated by the lower atomizing device 120-11 in the second emulsion is increased as long as the torque M1 generated by the upper roller drive is greater than the torque M2 generated by the lower roller drive; and vice versa.
- the determination device 170 is designed to determine the size difference AR between the friction at the top and the friction at the bottom as a function of the currents through the roller drives.
- the determination device 170 has a first current measuring device 174-1 for measuring the current flowing through the upper roller drive 160-1 and a second current measuring device 174-11 for measuring the current flowing through the lower roller drive 160-11.
- the determination device 170 has the calculation device 176, which in this case is designed to calculate the size difference AR between the friction above and the friction below, representative of the difference between the current flowing through the upper roller drive and the current flowing through the lower roller drive ,
- the difference in friction AR can be determined as a difference or as a quotient of the currents.
- the control device 150 is designed to generate the actuating signals S1 and S2 for the upper and the lower atomizing device 120-1, 120-11 in such a way that those from the upper one
- the droplet size of the first emulsion generated by the atomizer 120-1 is reduced and / or the droplet size of the second emulsion generated by the lower atomizer 120-11 is increased as long as the current flowing through the upper roller drive 160-1 is greater than that through the lower roller drive 160- II flowing current. This also applies in reverse.
- control device 150 can also be designed to provide further control signals S3 and S4 for the mixing devices 110-1 and 110-11 to generate. These control signals are then generated by the control device in such a way that the concentration of the lubricant in the first emulsion set by the mixing devices is increased and / or reduced for the second emulsion, as long as the friction at the top is greater than the friction at the bottom, and vice versa.
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 |
---|---|---|---|
DE102018209863.8A DE102018209863A1 (en) | 2018-06-19 | 2018-06-19 | Process and roll stand for rolling rolled material |
PCT/EP2019/066297 WO2019243472A1 (en) | 2018-06-19 | 2019-06-19 | Method and roll stand for rolling a material to be rolled |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3810347A1 true EP3810347A1 (en) | 2021-04-28 |
EP3810347B1 EP3810347B1 (en) | 2022-08-10 |
Family
ID=67106009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19734011.0A Active EP3810347B1 (en) | 2018-06-19 | 2019-06-19 | Method and roll stand for rolling a material to be rolled |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3810347B1 (en) |
JP (1) | JP7144545B2 (en) |
DE (1) | DE102018209863A1 (en) |
WO (1) | WO2019243472A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7020530B1 (en) * | 2020-10-29 | 2022-02-16 | Jfeスチール株式会社 | Cold rolling equipment, cold rolling method, and metal plate manufacturing method |
CN112845591B (en) * | 2020-12-04 | 2023-04-07 | 辽宁长江智能科技股份有限公司 | Production control method and system for continuous casting-hot rolling production line of steel mill |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5076920A (en) | 1973-11-08 | 1975-06-24 | ||
JPS54149352A (en) * | 1978-05-17 | 1979-11-22 | Ishikawajima Harima Heavy Ind Co Ltd | Rolling method by changing friction forces of upper and lower rolls |
JPS60161496A (en) * | 1984-02-01 | 1985-08-23 | Kobe Steel Ltd | Method for improving performance of emulsion-type lubrication oil |
DE19744503A1 (en) * | 1997-10-09 | 1999-04-15 | Schloemann Siemag Ag | Device and method for influencing the frictional relationships between an upper and a lower roll of a roll stand |
WO1999051369A1 (en) * | 1998-04-03 | 1999-10-14 | Alcan International Limited | Process for adjusting lubricant oil droplet size in an aluminum rolling mill |
JP4905056B2 (en) * | 2005-10-31 | 2012-03-28 | Jfeスチール株式会社 | Cold rolling method of metal sheet and cold tandem rolling mill |
JP4640157B2 (en) | 2005-12-15 | 2011-03-02 | Jfeスチール株式会社 | Cold rolling method and apparatus |
CN104105554B (en) * | 2012-02-15 | 2017-05-17 | 首要金属科技奥地利有限责任公司 | Low maintenance nozzle mixer unit for roll nip lubrication |
-
2018
- 2018-06-19 DE DE102018209863.8A patent/DE102018209863A1/en not_active Withdrawn
-
2019
- 2019-06-19 EP EP19734011.0A patent/EP3810347B1/en active Active
- 2019-06-19 JP JP2020570690A patent/JP7144545B2/en active Active
- 2019-06-19 WO PCT/EP2019/066297 patent/WO2019243472A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
JP2021528251A (en) | 2021-10-21 |
EP3810347B1 (en) | 2022-08-10 |
DE102018209863A1 (en) | 2019-12-19 |
WO2019243472A1 (en) | 2019-12-26 |
JP7144545B2 (en) | 2022-09-29 |
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