EP3446800A1 - Facility and method for cold rolling metal strip - Google Patents

Facility and method for cold rolling metal strip Download PDF

Info

Publication number
EP3446800A1
EP3446800A1 EP17785958.4A EP17785958A EP3446800A1 EP 3446800 A1 EP3446800 A1 EP 3446800A1 EP 17785958 A EP17785958 A EP 17785958A EP 3446800 A1 EP3446800 A1 EP 3446800A1
Authority
EP
European Patent Office
Prior art keywords
rolling
concentration coolant
jetting
coolant
low concentration
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
Application number
EP17785958.4A
Other languages
German (de)
French (fr)
Other versions
EP3446800B1 (en
EP3446800A4 (en
Inventor
Masaki Hirai
Ichiro Tanokuchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP3446800A1 publication Critical patent/EP3446800A1/en
Publication of EP3446800A4 publication Critical patent/EP3446800A4/en
Application granted granted Critical
Publication of EP3446800B1 publication Critical patent/EP3446800B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, 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
    • 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
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • 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
    • B21B1/24—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 in a continuous or semi-continuous process
    • B21B1/28—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 in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • 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
    • B21B2001/221—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 cold-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
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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

Definitions

  • This invention relates to a facility and a method for cold rolling a metal strip and, more particularly, to a facility for cold rolling a metal strip by using a circulating system for supplying a lubricant and a method for cold rolling by using such a facility.
  • the invention is explained by taking a "steel sheet" as an example for the metal strip.
  • Facilities for cold rolling a metal strip are divided, based on a system of feeding a lubricant (rolling oil), into a direct oil-feeding system wherein the rolling oil is directly jetted and fed onto a surface of a steel sheet and at the same time a cooling water is jetted onto a surface of a roll to cool thereof, and a circulating oil-feeding system wherein a cooling water (coolant) containing an emulsified rolling oil is fed to surfaces of a steel sheet and a work roll to simultaneously perform lubrication and cooling of the work roll.
  • a lubricant rolling oil
  • the rolling oil can be circulatingly used in the latter circulating oil-feeding system, the cost of the rolling oil is low as compared with the direct oil-feeding system using the rolling oil only once, while since the concentration of the rolling oil is low, the rolling property tends to be deteriorated.
  • the concentration of the rolling oil contained in the coolant is usually controlled to about 2-4 mass%.
  • the hybrid rolling is a technique of jetting a coolant having a concentration of the rolling oil of about 2-4 mass% (hereinafter referred to as "a low concentration coolant”) at an inlet side of the work roll and jetting a coolant having a high concentration of the rolling oil of about 10-15 mass% (hereinafter referred to as "a high concentration coolant”) at an upstream side of the jetting position of the low concentration coolant.
  • a low concentration coolant a coolant having a concentration of the rolling oil of about 2-4 mass%
  • a high concentration coolant a coolant having a high concentration of the rolling oil of about 10-15 mass%
  • Patent Literature 1 JP-A-2007-144514 (Japanese Patent No. 4905056 )
  • the high concentration coolant is jetted toward the low concentration coolant accumulated on the sheet surface, so that the high concentration coolant is mixed with the low concentration coolant and diluted, and hence the oil content in the high concentration coolant cannot reach the sheet surface, and the effect by the hybrid rolling cannot be obtained.
  • the invention is made in view of the above problems inherent to the conventional technique, and an object thereof is to provide a facility for cold rolling a metal strip which is capable of rolling without damaging the plate-out property even if the rolling rate is decreased in a hybrid rolling of a circulating system and to propose a method for cold rolling a metal strip by using such a cold rolling facility.
  • the inventors have made various studies to solve the above task. As a result, they have found out that it is effective to provide the cold rolling facility with a function of varying the jetting amount of the low concentration coolant in accordance with the rolling rate and perform rolling while controlling the jetting amount of the low concentration coolant so that the tip of the liquid pool of the low concentration coolant formed on the sheet surface at an inlet side of the work roll does not reach the jetting position of the high concentration coolant, and the invention has been accomplished.
  • the invention is a facility for cold rolling a metal strip in a circulating oil-feeding system by jetting a low concentration coolant in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of a jetting position of the low concentration coolant to conduct rolling, characterized in that the facility is provided with a control equipment for varying a jetting amount of the low concentration coolant in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a sheet surface at an inlet side of the work roll does not reach a jetting position of the high concentration coolant.
  • the facility for cold rolling a metal strip according to the invention is characterized by having a control equipment for varying a jetting amount of the high concentration coolant in accordance with the rolling rate.
  • the facility for cold rolling a metal strip according to the invention is characterized in that a concentration of a rolling oil in the low concentration coolant is 2-4 mass% and a concentration of a rolling oil in the high concentration coolant is 10-15 mass%.
  • the invention is a method for cold rolling a metal strip in a cold rolling facility of a circulating oil-feeding system by jetting a low concentration coolant in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of a jetting position of the low concentration coolant to conduct rolling, characterized in that a jetting amount of the low concentration coolant is varied in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a sheet surface at an inlet side of the work roll does not reach a jetting position of the high concentration coolant.
  • the method for cold rolling a metal strip according to the invention is characterized in that a jetting amount of the high concentration coolant is varied in accordance with the rolling rate.
  • the method for cold rolling a metal strip according to the invention is characterized in that a concentration of a rolling oil in the low concentration coolant is 2-4 mass% and a concentration of a rolling oil in the high concentration coolant is 10-15 mass%.
  • the tip of the liquid pool of the low concentration coolant formed on the sheet surface at an inlet side of the work roll is controlled so as not to reach the jetting position of the high concentration coolant, so that it is possible to sufficiently obtain an effect by the hybrid rolling.
  • FIG. 1 is a view illustrating a feeding system of a coolant when a hybrid rolling technique is adopted in a conventional cold rolling facility of a circulating oil-feeding system.
  • a steel sheet 1 is rolled by a work roll 2 to a predetermined sheet thickness.
  • a low concentration coolant is jetted to a steel sheet surface from a spray header 3 by a spray pump 8 to enhance lubricity between the steel sheet 1 and the work roll 2 and conduct cooling of the work roll 2 simultaneously.
  • the low concentration coolant used for jetting to the steel sheet surface is thereafter collected in a return tank 4 disposed in an oil cellar through an oil pan 11, returned to a clean tank 7 through a filter 6 disposed above ground by a return pump 5 and circulatingly used.
  • the low concentration coolant jetted to the steel sheet surface from the spray header 3 forms a liquid pool 10 of a length X on the sheet surface toward an upstream side.
  • a high concentration coolant is prepared in a high concentration coolant tank 12 and jetted to the steel sheet surface from a spray header 9 by a spray pump 13.
  • the high concentration coolant used for jetting is collected through the above oil pan 11, mixed with the low concentration coolant and circulatingly used as a low concentration coolant.
  • the spray header 9 for the high concentration coolant is disposed in a position located at an upstream side from the jetting position of the low concentration coolant and separated from the work roll at a distance of L toward an upstream side in order to sufficiently ensure a time required for the adhesion of oil content to the sheet surface to enhance a plate-out property.
  • numeral 14 represents a draining roll having a function of removing the coolant adhered to the steel sheet surface in the rolling at the previous stand.
  • FIG. 2 schematically illustrates a relation between a rolling rate V and a length X of a liquid pool of the low concentration coolant formed on the steel sheet surface at an inlet side of the work roll. Since the amount of the rolling oil drawn into a roll bite is varied in accordance with the rolling rate V, the length X of the liquid pool becomes long when the rolling rate is low and becomes short when the rolling rate is high.
  • FIG. 3 schematically illustrates a relation between the length X of the liquid pool of the low concentration coolant and a position of a spray header for the high concentration coolant disposed at a distance of L from the work roll toward an upstream side when the rolling rate is decreased.
  • the rolling rate V is low, the length X of the liquid pool of the low concentration coolant becomes longer than the distance L between the work roll 2 and the position of the spray header 9 disposed for the high concentration coolant and sometimes reaches to a position of the draining roll 14.
  • FIG. 4 schematically illustrates a relation between the jetting amount Q of the low concentration coolant and the length X of the liquid pool of the low concentration coolant.
  • the length X of the liquid pool is varied in accordance with the jetting amount Q of the low concentration coolant.
  • the length X of the liquid pool becomes shorter as the jetting amount Q becomes smaller, while the length X of the liquid pool becomes longer as the jetting amount Q becomes larger.
  • the length X of the liquid pool of the low concentration coolant is made shorter than the length L between the work roll 2 and the position of the spray header 9 disposed for the high concentration coolant by decreasing the jetting amount Q of the low concentration coolant. That is, the tip at the upstream side of the liquid pool is prevented from reaching the position of the spray header disposed for the high concentration coolant, whereby the high concentration coolant can be directly sprayed to the steel sheet surface all the time.
  • the invention is characterized in that the jetting amount Q of the low concentration coolant is controlled in accordance with the rolling rate V to achieve cold rolling having an excellent plate-out property.
  • FIG. 5 illustrates an example of a coolant feeding system in the cold rolling facility according to the invention which controls the jetting amount of the low concentration coolant in accordance with a rolling rate.
  • a flow regulating valve 17 is installed in the feeding system of the low concentration coolant.
  • the jetting amount Q of the low concentration coolant is calculated by a distributed control system (DCS) 15 based on a command for the rolling rate from a driving motor 16 of the work roll so as to make the length X of the liquid pool of the low concentration coolant shorter than the distance L to the jetting position of the high concentration coolant, and the calculated result is given to the flow regulating valve 17 disposed in the feeding system of the low concentration coolant as an opening command.
  • DCS distributed control system
  • a flow regulating valve is disposed in the feeding system of the high concentration coolant similarly in the case of the low concentration coolant, whereby the jetting amount of the high concentration coolant may be adjusted within a proper range based on the command for the rolling rate.
  • the rolling rate becomes higher, a rolling load is increased, so that it is necessary to increase the jetting amount of the rolling oil fed.
  • the jetting amount of high concentration coolant is controlled in accordance with the rolling rate as above, it is possible to jet a proper amount of the rolling oil in accordance with the rolling rate.
  • FIG. 6 shows a relation between the jetting amount Q of a low concentration coolant and the length X of a liquid pool of the low concentration coolant formed on the sheet surface when the rolling rate is varied in three stages of 200 m/min, 400 m/min, and 1000 m/min.
  • a point A shows the length X of the liquid pool when rolling is performed at a rolling rate V of 1000 mpm in a maximum jetting amount Q max of the low concentration coolant.
  • the rolling rate is high and a working heat generation amount per unit time is large, the work roll is cooled by jetting the low concentration coolant in a jetting amount of the maximum value Q max .
  • the length X of the liquid pool is shorter than the distance L between the work roll and the position of the spray header disposed for the high concentration coolant.
  • the length of the liquid pool is increased as shown in FIG. 2 .
  • the rolling rate V is decreased from 1000 mpm to 400 mpm
  • the length X of the liquid pool is transferred from the point A to a point B, and hence the length of the liquid pool becomes longer than the distance L between the work roll and the position of the spray header disposed for the high concentration coolant.
  • the jetting amount of the low concentration coolant is decreased from Q max to Q 1 , the length X of the liquid pool is transferred to a point C and hence the length X of the liquid pool becomes shorter than the distance L between the work roll and the position of the spray header disposed for the high concentration coolant.
  • cooling power of the roll is also decreased due to the decrease of the jetting amount of the low concentration coolant, but the working heat generation amount per unit time is also decreased by the decrease of the rolling rate, so that no problem is caused.
  • the length X of the liquid pool is transferred from the point C to a point D by decreasing the jetting amount of the low concentration coolant to Q 2 , so that the length X of the liquid pool becomes shorter than the distance L between the work roll and the position of the spray header disposed for the high concentration coolant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

In a facility for cold rolling a metal strip in a circulating oil-feeding system by jetting a low concentration coolant in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of the jetting position of the low concentration coolant to conduct rolling, the metal strip is cold rolled with the cold rolling facility provided with a control equipment for varying a jetting amount of the low concentration coolant in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a surface of a steel sheet at an inlet side of the work roll does not reach a jetting position of the high concentration coolant, whereby the rolling can be performed without losing a plate-out property even if the rolling rate is decreased.

Description

    Technical Field
  • This invention relates to a facility and a method for cold rolling a metal strip and, more particularly, to a facility for cold rolling a metal strip by using a circulating system for supplying a lubricant and a method for cold rolling by using such a facility. Hereinafter, the invention is explained by taking a "steel sheet" as an example for the metal strip.
    • Background Art
  • Facilities for cold rolling a metal strip are divided, based on a system of feeding a lubricant (rolling oil), into a direct oil-feeding system wherein the rolling oil is directly jetted and fed onto a surface of a steel sheet and at the same time a cooling water is jetted onto a surface of a roll to cool thereof, and a circulating oil-feeding system wherein a cooling water (coolant) containing an emulsified rolling oil is fed to surfaces of a steel sheet and a work roll to simultaneously perform lubrication and cooling of the work roll. Since the rolling oil can be circulatingly used in the latter circulating oil-feeding system, the cost of the rolling oil is low as compared with the direct oil-feeding system using the rolling oil only once, while since the concentration of the rolling oil is low, the rolling property tends to be deteriorated.
  • In order to solve the above problem inherent to the circulating oil-feeding system, it is effective to increase the concentration of the rolling oil contained in the coolant. When the concentration of the rolling oil is increased, the lubricity between the metal strip and the work roll is improved, while the cooling power is decreased. Therefore, the concentration of the rolling oil in the coolant is usually controlled to about 2-4 mass%.
  • Even in the cold rolling facility of the circulating oil-feeding system, it is sometimes necessary to roll such a type of steel that has a large deformation resistance in a good productivity. As a technique meeting such a requirement is disclosed a "hybrid rolling" in Patent Literature 1. The hybrid rolling is a technique of jetting a coolant having a concentration of the rolling oil of about 2-4 mass% (hereinafter referred to as "a low concentration coolant") at an inlet side of the work roll and jetting a coolant having a high concentration of the rolling oil of about 10-15 mass% (hereinafter referred to as "a high concentration coolant") at an upstream side of the jetting position of the low concentration coolant. When this technique is adopted, a large amount of oil content can be adhered to the steel sheet surface by the feed of the high concentration coolant (hereinafter referred to as "plate-out"), so that the lubricity between the steel strip and the work roll can be increased to decrease a rolling load. Since a certain amount of time is necessary for the adhesion of the oil content to the sheet surface, in order to enhance the plate-out property, it is desirable to jet the high concentration coolant at a position separated from the work roll at a certain distance at an upstream side thereof.
    • Citation List Patent Literature
  • Patent Literature 1: JP-A-2007-144514 (Japanese Patent No. 4905056 )
    • Summary of Invention Technical Problem
  • In an actual hybrid rolling, there is a case that a decrease of the rolling rate cannot be avoided due to defects or the like existing in a rolling raw material (base material). When the feeding amount of the low concentration coolant is made constant irrespectively of the rolling rate, if the decrease of the rolling rate is caused, a liquid pool of the low concentration coolant formed on the steel sheet surface at an inlet side of the work roll is expanded toward the upstream side to make the length of the liquid pool long, and hence a tip portion of the liquid pool at the upstream side may reach the jetting position of the high concentration coolant. At such a state, the high concentration coolant is jetted toward the low concentration coolant accumulated on the sheet surface, so that the high concentration coolant is mixed with the low concentration coolant and diluted, and hence the oil content in the high concentration coolant cannot reach the sheet surface, and the effect by the hybrid rolling cannot be obtained.
  • With regard to the above problem, it can be considered to further increase the concentration of the rolling oil in the high concentration coolant, but there is a problem that the amount of the rolling oil used is increased to deteriorate unit consumption.
  • It is also considered to move the jetting position of the high concentration coolant to an upstream side further separated from a zone forming the liquid pool of the low concentration coolant, but it is actually difficult because there is a restriction on the distance between stands in a cold rolling facility of tandem type or the like.
  • The invention is made in view of the above problems inherent to the conventional technique, and an object thereof is to provide a facility for cold rolling a metal strip which is capable of rolling without damaging the plate-out property even if the rolling rate is decreased in a hybrid rolling of a circulating system and to propose a method for cold rolling a metal strip by using such a cold rolling facility.
    • Solution to Problem
  • The inventors have made various studies to solve the above task. As a result, they have found out that it is effective to provide the cold rolling facility with a function of varying the jetting amount of the low concentration coolant in accordance with the rolling rate and perform rolling while controlling the jetting amount of the low concentration coolant so that the tip of the liquid pool of the low concentration coolant formed on the sheet surface at an inlet side of the work roll does not reach the jetting position of the high concentration coolant, and the invention has been accomplished.
  • That is, the invention is a facility for cold rolling a metal strip in a circulating oil-feeding system by jetting a low concentration coolant in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of a jetting position of the low concentration coolant to conduct rolling, characterized in that the facility is provided with a control equipment for varying a jetting amount of the low concentration coolant in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a sheet surface at an inlet side of the work roll does not reach a jetting position of the high concentration coolant.
  • The facility for cold rolling a metal strip according to the invention is characterized by having a control equipment for varying a jetting amount of the high concentration coolant in accordance with the rolling rate.
  • The facility for cold rolling a metal strip according to the invention is characterized in that a concentration of a rolling oil in the low concentration coolant is 2-4 mass% and a concentration of a rolling oil in the high concentration coolant is 10-15 mass%.
  • Further, the invention is a method for cold rolling a metal strip in a cold rolling facility of a circulating oil-feeding system by jetting a low concentration coolant in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of a jetting position of the low concentration coolant to conduct rolling, characterized in that a jetting amount of the low concentration coolant is varied in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a sheet surface at an inlet side of the work roll does not reach a jetting position of the high concentration coolant.
  • The method for cold rolling a metal strip according to the invention is characterized in that a jetting amount of the high concentration coolant is varied in accordance with the rolling rate.
  • The method for cold rolling a metal strip according to the invention is characterized in that a concentration of a rolling oil in the low concentration coolant is 2-4 mass% and a concentration of a rolling oil in the high concentration coolant is 10-15 mass%.
    • Advantageous Effects of Invention
  • According to the invention, the tip of the liquid pool of the low concentration coolant formed on the sheet surface at an inlet side of the work roll is controlled so as not to reach the jetting position of the high concentration coolant, so that it is possible to sufficiently obtain an effect by the hybrid rolling.
    • Brief Description of the Drawings
    • FIG. 1 is a view illustrating a feeding system of a rolling oil in a conventional hybrid rolling.
    • FIG. 2 is a schematic view showing a relation between a rolling rate V and a length X of a liquid pool.
    • FIG. 3 is a view illustrating a state that a tip of a liquid pool reaches a jetting position of a high concentration coolant when a rolling rate is low.
    • FIG. 4 is a schematic view showing a relation between a jetting amount Q of a low concentration coolant and a length X of a liquid pool.
    • FIG. 5 is a view illustrating an example of a feeding system of a rolling oil in a cold rolling facility according to the invention for controlling a jetting amount of a low concentration coolant in accordance with a rolling rate.
    • FIG. 6 is a view illustrating a method of controlling a jetting amount of a low concentration coolant in the method for cold rolling according to the invention.
    Description of Embodiments
  • FIG. 1 is a view illustrating a feeding system of a coolant when a hybrid rolling technique is adopted in a conventional cold rolling facility of a circulating oil-feeding system. A steel sheet 1 is rolled by a work roll 2 to a predetermined sheet thickness. At this time, a low concentration coolant is jetted to a steel sheet surface from a spray header 3 by a spray pump 8 to enhance lubricity between the steel sheet 1 and the work roll 2 and conduct cooling of the work roll 2 simultaneously. The low concentration coolant used for jetting to the steel sheet surface is thereafter collected in a return tank 4 disposed in an oil cellar through an oil pan 11, returned to a clean tank 7 through a filter 6 disposed above ground by a return pump 5 and circulatingly used. In this case, the low concentration coolant jetted to the steel sheet surface from the spray header 3 forms a liquid pool 10 of a length X on the sheet surface toward an upstream side.
  • On the other hand, a high concentration coolant is prepared in a high concentration coolant tank 12 and jetted to the steel sheet surface from a spray header 9 by a spray pump 13. The high concentration coolant used for jetting is collected through the above oil pan 11, mixed with the low concentration coolant and circulatingly used as a low concentration coolant. Moreover, the spray header 9 for the high concentration coolant is disposed in a position located at an upstream side from the jetting position of the low concentration coolant and separated from the work roll at a distance of L toward an upstream side in order to sufficiently ensure a time required for the adhesion of oil content to the sheet surface to enhance a plate-out property. In this figure, numeral 14 represents a draining roll having a function of removing the coolant adhered to the steel sheet surface in the rolling at the previous stand.
  • FIG. 2 schematically illustrates a relation between a rolling rate V and a length X of a liquid pool of the low concentration coolant formed on the steel sheet surface at an inlet side of the work roll. Since the amount of the rolling oil drawn into a roll bite is varied in accordance with the rolling rate V, the length X of the liquid pool becomes long when the rolling rate is low and becomes short when the rolling rate is high.
  • FIG. 3 schematically illustrates a relation between the length X of the liquid pool of the low concentration coolant and a position of a spray header for the high concentration coolant disposed at a distance of L from the work roll toward an upstream side when the rolling rate is decreased. When the rolling rate V is low, the length X of the liquid pool of the low concentration coolant becomes longer than the distance L between the work roll 2 and the position of the spray header 9 disposed for the high concentration coolant and sometimes reaches to a position of the draining roll 14.
  • FIG. 4 schematically illustrates a relation between the jetting amount Q of the low concentration coolant and the length X of the liquid pool of the low concentration coolant. The length X of the liquid pool is varied in accordance with the jetting amount Q of the low concentration coolant. The length X of the liquid pool becomes shorter as the jetting amount Q becomes smaller, while the length X of the liquid pool becomes longer as the jetting amount Q becomes larger.
  • In the invention, therefore, when the rolling rate V is decreased, the length X of the liquid pool of the low concentration coolant is made shorter than the length L between the work roll 2 and the position of the spray header 9 disposed for the high concentration coolant by decreasing the jetting amount Q of the low concentration coolant. That is, the tip at the upstream side of the liquid pool is prevented from reaching the position of the spray header disposed for the high concentration coolant, whereby the high concentration coolant can be directly sprayed to the steel sheet surface all the time. In other words, the invention is characterized in that the jetting amount Q of the low concentration coolant is controlled in accordance with the rolling rate V to achieve cold rolling having an excellent plate-out property.
  • FIG. 5 illustrates an example of a coolant feeding system in the cold rolling facility according to the invention which controls the jetting amount of the low concentration coolant in accordance with a rolling rate. A flow regulating valve 17 is installed in the feeding system of the low concentration coolant. The jetting amount Q of the low concentration coolant is calculated by a distributed control system (DCS) 15 based on a command for the rolling rate from a driving motor 16 of the work roll so as to make the length X of the liquid pool of the low concentration coolant shorter than the distance L to the jetting position of the high concentration coolant, and the calculated result is given to the flow regulating valve 17 disposed in the feeding system of the low concentration coolant as an opening command.
  • Even if the rolling rate is decreased, when the high concentration coolant is jetted in the same amount as for a high rolling rate, the amount of the rolling oil jetted to the steel sheet surface becomes larger to increase the lubricity. However, when the lubricity becomes extremely high, an abnormal rolling such as slip or chattering is caused. Therefore, when the jetting amount of the high concentration coolant is adjusted in accordance with the rolling rate, a proper oil content required for the cold rolling can be fed, whereby the cold rolling can be stably performed.
  • In order to adjust the jetting amount of the high concentration coolant in accordance with the rolling rate, a flow regulating valve is disposed in the feeding system of the high concentration coolant similarly in the case of the low concentration coolant, whereby the jetting amount of the high concentration coolant may be adjusted within a proper range based on the command for the rolling rate.
  • In general, as the rolling rate becomes higher, a rolling load is increased, so that it is necessary to increase the jetting amount of the rolling oil fed. When the jetting amount of high concentration coolant is controlled in accordance with the rolling rate as above, it is possible to jet a proper amount of the rolling oil in accordance with the rolling rate.
    • EXAMPLE
  • FIG. 6 shows a relation between the jetting amount Q of a low concentration coolant and the length X of a liquid pool of the low concentration coolant formed on the sheet surface when the rolling rate is varied in three stages of 200 m/min, 400 m/min, and 1000 m/min.
  • In this figure, a point A shows the length X of the liquid pool when rolling is performed at a rolling rate V of 1000 mpm in a maximum jetting amount Qmax of the low concentration coolant. At the point A, since the rolling rate is high and a working heat generation amount per unit time is large, the work roll is cooled by jetting the low concentration coolant in a jetting amount of the maximum value Qmax. However, since the amount of the low concentration coolant drawn into the roll bite is also large, the length X of the liquid pool is shorter than the distance L between the work roll and the position of the spray header disposed for the high concentration coolant.
  • When the rolling rate is decreased for some reasons such as defects in the rolling material, the length of the liquid pool is increased as shown in FIG. 2. For example, when the rolling rate V is decreased from 1000 mpm to 400 mpm, the length X of the liquid pool is transferred from the point A to a point B, and hence the length of the liquid pool becomes longer than the distance L between the work roll and the position of the spray header disposed for the high concentration coolant.
  • When the jetting amount of the low concentration coolant is decreased from Qmax to Q1, the length X of the liquid pool is transferred to a point C and hence the length X of the liquid pool becomes shorter than the distance L between the work roll and the position of the spray header disposed for the high concentration coolant. In this case, cooling power of the roll is also decreased due to the decrease of the jetting amount of the low concentration coolant, but the working heat generation amount per unit time is also decreased by the decrease of the rolling rate, so that no problem is caused.
  • Further, even when the rolling rate V is further decreased from 400 mpm to 200 mpm for some reasons such as a division of the steel sheet into plural coils at an outlet side, the length X of the liquid pool is transferred from the point C to a point D by decreasing the jetting amount of the low concentration coolant to Q2, so that the length X of the liquid pool becomes shorter than the distance L between the work roll and the position of the spray header disposed for the high concentration coolant.
    • DESCRIPTION OF REFERENCE SYMBOLS
    • 1:
    metal strip (steel sheet)
    2:
    work roll
    3:
    spray header for low concentration coolant
    4:
    return tank
    5:
    return pump
    6:
    filter
    7:
    clean tank
    8:
    spray pump
    9:
    spray header for high concentration coolant
    10:
    liquid pool of low concentration coolant
    11:
    oil pan
    12:
    tank for high concentration coolant
    13:
    spray pump for high concentration coolant
    14:
    draining roll
    15:
    distributed control system
    16:
    driving motor for work roll
    17:
    flow regulating valve for low concentration coolant

Claims (6)

  1. A facility for cold rolling a metal strip in a circulating oil-feeding system by jetting a low concentration coolant in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of a jetting position for the low concentration coolant to conduct rolling,
    characterized in that the facility is provided with a control equipment for varying a jetting amount of the low concentration coolant in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a surface of a steel sheet at an inlet side of the work roll does not reach a jetting position of the high concentration coolant.
  2. The facility for cold rolling a metal strip according to claim 1, which is provided with a control equipment for varying a jetting amount of the high concentration coolant in accordance with the rolling rate.
  3. The facility for cold rolling a metal strip according to claim 1 or 2, wherein a concentration of a rolling oil in the low concentration coolant is 2-4 mass% and a concentration of a rolling oil in the high concentration coolant is 10-15 mass%.
  4. A method for cold rolling a metal strip with a cold rolling facility in a circulating oil-feeding system by jetting a low concentration coolant in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of a jetting position of the low concentration coolant to conduct rolling,
    characterized in that a jetting amount of the low concentration coolant is varied in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a sheet surface at an inlet side of the work roll does not reach a jetting position of the high concentration coolant.
  5. The method for cold rolling a metal strip according to claim 4, wherein a jetting amount of the high concentration coolant is varied in accordance with the rolling rate.
  6. The method for cold rolling a metal strip according to claim 4 or 5, wherein a concentration of a rolling oil in the low concentration coolant is 2-4 mass% and a concentration of a rolling oil in the high concentration coolant is 10-15 mass%.
EP17785958.4A 2016-04-21 2017-04-18 Facility and method for cold rolling metal strip Active EP3446800B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016084993A JP6455683B2 (en) 2016-04-21 2016-04-21 Cold rolling equipment and cold rolling method for metal strip
PCT/JP2017/015523 WO2017183620A1 (en) 2016-04-21 2017-04-18 Facility and method for cold rolling metal strip

Publications (3)

Publication Number Publication Date
EP3446800A1 true EP3446800A1 (en) 2019-02-27
EP3446800A4 EP3446800A4 (en) 2019-04-03
EP3446800B1 EP3446800B1 (en) 2020-09-09

Family

ID=60116084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17785958.4A Active EP3446800B1 (en) 2016-04-21 2017-04-18 Facility and method for cold rolling metal strip

Country Status (8)

Country Link
US (1) US20200324327A1 (en)
EP (1) EP3446800B1 (en)
JP (1) JP6455683B2 (en)
KR (1) KR102110068B1 (en)
CN (1) CN108883451B (en)
RU (1) RU2704050C1 (en)
TW (1) TWI651138B (en)
WO (1) WO2017183620A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3238843A1 (en) * 2016-04-29 2017-11-01 Primetals Technologies Austria GmbH Method for rolling a product to be rolled

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE894339A (en) * 1982-09-08 1983-01-03 Sumitomo Metal Ind Clean cold-rolled steel strip prodn. - by weak lubricant emulsion injection at last mill stand
SU1176990A1 (en) * 1983-12-20 1985-09-07 Институт черной металлургии Apparatus for forcing lubricant to the point of deformity when rolling
JPH01309705A (en) * 1988-06-09 1989-12-14 Kawasaki Steel Corp Continuous cold rolling equipment
JP2910604B2 (en) * 1995-02-13 1999-06-23 住友金属工業株式会社 Temper rolling method for stainless steel strip
JPH10216811A (en) * 1997-02-05 1998-08-18 Kawasaki Steel Corp Rolling method with little roll wear
JP4309501B2 (en) * 1999-01-13 2009-08-05 新日本製鐵株式会社 Rolling method for cold tandem rolling mill
WO2001066277A1 (en) * 2000-03-09 2001-09-13 Nkk Corporation Rolling oil supplying method for cold rolling
KR100476807B1 (en) * 2000-06-28 2005-03-16 주식회사 포스코 Method for controlling shape of steel in low-speed part of cold roller
DE10143407A1 (en) * 2001-09-05 2003-03-20 Sms Demag Ag Selective use of lubricants when cold-rolling metal strip, employs emulsion for relatively-large reductions and rolling oil for smaller, finishing reductions
DE102004025058A1 (en) * 2004-05-18 2005-12-08 Sms Demag Ag Method and device for cooling and / or lubrication of rolls and / or rolling stock
JP4355279B2 (en) * 2004-11-22 2009-10-28 新日本製鐵株式会社 Lubricating oil supply method in cold rolling
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
JP4935207B2 (en) * 2006-06-30 2012-05-23 Ｊｆｅスチール株式会社 Cold rolling method for metal sheet
JP2009007510A (en) * 2007-06-29 2009-01-15 Jfe Steel Kk Cold rolling oil and cold rolling method
CN101829693B (en) * 2010-04-27 2011-11-09 中冶南方工程技术有限公司 Blowing-free emulsion residue removal method
JP2012055955A (en) * 2010-09-13 2012-03-22 Nippon Steel Corp Rolling lubricating method in cold rolling, and device therefor
CN102248012B (en) * 2011-07-26 2013-05-08 杨海西 Cooling device and method for hot-rolling process of wire rod
JP5723727B2 (en) * 2011-08-31 2015-05-27 株式会社日立製作所 Rolling mill control device and rolling mill control method
JP5850247B2 (en) * 2012-04-18 2016-02-03 日本パーカライジング株式会社 Cold rolling oil and cold rolling method suitable for hybrid supply system
CN103878185B (en) * 2012-12-21 2016-01-27 宝山钢铁股份有限公司 A kind of dynamic segment cooling control method for hot-rolling laminar cooling
CN105080977B (en) * 2015-08-12 2017-07-04 莱芜钢铁集团电子有限公司 A kind of leveling precision flow control methods

Also Published As

Publication number Publication date
TW201825207A (en) 2018-07-16
WO2017183620A1 (en) 2017-10-26
TWI651138B (en) 2019-02-21
JP6455683B2 (en) 2019-01-23
CN108883451A (en) 2018-11-23
KR102110068B1 (en) 2020-05-12
JP2017192966A (en) 2017-10-26
BR112018071470A2 (en) 2019-02-19
CN108883451B (en) 2019-11-22
EP3446800B1 (en) 2020-09-09
EP3446800A4 (en) 2019-04-03
US20200324327A1 (en) 2020-10-15
RU2704050C1 (en) 2019-10-23
KR20180117665A (en) 2018-10-29

Similar Documents

Publication Publication Date Title
KR100889018B1 (en) Method of lubricant supply in cold rolling
JP4905056B2 (en) Cold rolling method of metal sheet and cold tandem rolling mill
EP3446800B1 (en) Facility and method for cold rolling metal strip
JP4654719B2 (en) Method and apparatus for supplying rolling oil in cold rolling
JP4910771B2 (en) Cold rolling method for metal sheet
CN111148582B (en) Rolling of rolled material
JP5262889B2 (en) Cold rolling method using emulsion rolling oil, method for producing cold rolled metal sheet, and cold tandem rolling mill
JP2007253178A (en) Cold-rolling method
JP6965993B2 (en) Rolling method, metal plate manufacturing method and rolling equipment
JP4924398B2 (en) Lubricating oil supply method in cold rolling
JP2000280002A (en) Cold tandem rolling method of strip and cold tandem rolling mill
JP5114677B2 (en) Hot rolling equipment and hot rolling method
JP2020138218A (en) Cold rolling method and cold rolling facility for metal strip
BR112018071470B1 (en) INSTALLATION AND METHOD FOR COLD LAMINATION OF METAL STRIPE
JP4191838B2 (en) Cold tandem rolling method
JP4534833B2 (en) Rolling mill and strip rolling method using the same
Cook METAL ROLLING PRINCIPLES
JP2002282926A (en) Rolling control method
CA3221488A1 (en) Device & method for rolling a steel strip
LAYOUTS LUBRICATION IN PRACTICE
JP2010023076A (en) Cold-rolling method and cold-rolling equipment excellent in heat scratch resistance and method of manufacturing cold-rolled metal sheet excellent in heat-scratch resistance
Cook Metal Rolling Operations

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20181113

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

A4 Supplementary search report drawn up and despatched

Effective date: 20190306

RIC1 Information provided on ipc code assigned before grant

Ipc: B21B 27/10 20060101ALI20190227BHEP

Ipc: B21B 45/02 20060101AFI20190227BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20200311

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTC Intention to grant announced (deleted)
INTG Intention to grant announced

Effective date: 20200529

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1310916

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200915

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602017023436

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201210

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201209

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201209

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1310916

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200909

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210111

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210109

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602017023436

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20210610

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20210418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210418

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200923

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20170418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20240308

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240227

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200909