EP3238843A1 - Procede de laminage d'un produit de laminage - Google Patents

Procede de laminage d'un produit de laminage Download PDF

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Publication number
EP3238843A1
EP3238843A1 EP16167662.2A EP16167662A EP3238843A1 EP 3238843 A1 EP3238843 A1 EP 3238843A1 EP 16167662 A EP16167662 A EP 16167662A EP 3238843 A1 EP3238843 A1 EP 3238843A1
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EP
European Patent Office
Prior art keywords
rolling
lubricant
rolling stock
additional
lubrication
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.)
Withdrawn
Application number
EP16167662.2A
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German (de)
English (en)
Inventor
Matthias Holzweber
Konrad Krimpelstaetter
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.)
Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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
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Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP16167662.2A priority Critical patent/EP3238843A1/fr
Priority to US16/094,911 priority patent/US11161161B2/en
Priority to EP17723941.5A priority patent/EP3448592B1/fr
Priority to PCT/EP2017/060193 priority patent/WO2017186910A1/fr
Priority to MX2018012916A priority patent/MX2018012916A/es
Priority to RU2018133704A priority patent/RU2701916C1/ru
Priority to JP2018556441A priority patent/JP6820349B2/ja
Priority to CN201780026643.5A priority patent/CN109070162B/zh
Publication of EP3238843A1 publication Critical patent/EP3238843A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
    • 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
    • B21B45/0239—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

  • the invention relates to a method for rolling, in particular for cold rolling, a rolling stock, in which the rolling stock is guided through a nip between two work rolls of a roll stand and a contact zone, in which a contact surface of the rolling stock bears against a work roll, is lubricated.
  • the rolling stock is a metallic rolled strip, which is pulled by the rotating work rolls through the nip in order to reduce its thickness.
  • the lubrication of a contact zone in which the rolling stock is in contact with a work roll reduces the friction between the rolling stock and the work roll.
  • the work rolls are usually cooled.
  • Various methods and devices for lubricating contact zones in which a rolling stock is in contact with work rolls are known.
  • EP 2 651 577 B1 discloses a method for applying a lubricant during rolling of a metal rolled strip, which is guided in a nip between two work rolls.
  • a mixture of the lubricant and a carrier gas is generated in a atomizing device, and the mixture is applied with spray nozzles on the surface of at least one work roll and / or on the surface of the rolled strip.
  • WO 2013/029886 A1 discloses an operating method for a reversing mill with at least one reversing roll stand for rolling a rolling stock and a coiler for coiling the rolled stock after a rolling pass.
  • a rolling oil application device which is arranged between the at least one reversing roll stand and the coiler, exclusively rolling oil without water as the carrier medium applied to the rolling stock.
  • WO 00/64605 A1 discloses a rolling assembly having at least one rolling stand for rolling a metal strip and a rolling mill associated lubricating device for distributed over the metal strip width applying an amount of lubricant to the metal strip.
  • the lubricating device comprises a basic lubricating device and an auxiliary lubricating device, wherein the amount and distribution of the lubricant to be applied by the basic lubricating device during a sting constant and the amount and / or distribution of the lubricant to be applied by the additional lubricating device is adjustable.
  • a lubrication course is determined with a lubrication course detection device over the metal strip width and used to adjust the amount and / or the distribution of the lubricant and / or at least one rolling parameter.
  • EP 1 750 864 B2 discloses a method and apparatus for cooling and / or lubricating rolls and / or rolling stock.
  • a cooling medium on the rollers and for lubrication on the other hand applied a base oil before the nip on the rolling
  • the cooling medium separated from the base oil on the rollers and excluding the base oil without water as a carrier medium in a relative to the usual amount of very small amount is applied directly to the rolling over its entire width.
  • EP 0 794 023 A2 discloses a rolling mill and method for cold rolling a rolling stock in which rolling oil is introduced between the rolling stock and the work rolls immediately before a nip, and cooling water is applied to the work rolls.
  • WO 2013/120750 A1 discloses an apparatus and a method for lubricating the rolls of a rolling stand, wherein a mixture of water and oil is produced by means of a mixing and spraying device and this mixture is sprayed onto at least one of the rolls of the rolling stand and / or on the surface of the rolling stock.
  • the invention has for its object to provide an improved method for rolling a rolled material, in which the rolling stock is guided through a nip between two work rolls of a roll stand and contact zones in which the rolling stock is in contact with the work rolls, lubricated.
  • the rolling stock is guided in a rolling direction through a nip between two work rolls of a rolling stand and a cooling zone for lubricating the contact zone is introduced into a contact zone in which a contact surface of the rolling stock bears against a work roll. Furthermore, a lubrication requirement of the contact zone is determined in dependence on at least one process parameter of the rolling process, and with respect to the rolling direction in front of the nip at a predetermined application distance from the nip, an additional lubricant is applied to the contact surface of the rolling stock when the amount of cooling lubricant currently being introduced into the contact zone requires lubrication does not cover.
  • the method thus advantageously allows, if necessary, in addition to a cooling lubricant, an additional lubricant to use for lubrication of a contact zone between the rolling stock and a work roll, if the introduced amount of cooling lubricant does not allow sufficient lubrication.
  • the additional lubrication reduces the nip friction between the rolling stock and the work roll in the contact zone and thereby advantageously enables an energy saving by a lower required drive power for the work roll.
  • improved lubrication also creates the ability to roll even high-strength rolling stock with acceptable puncture, since when rolling high-strength rolling increased rolling forces arise and therefore increased lubrication requirements.
  • the product range which can be generated with the roll stand is advantageously expanded.
  • the production flexibility can be further increased.
  • the additional lubricant by the application of the additional lubricant, a lubrication independent of the cooling is made possible.
  • the additional lubricant Due to the fact that the additional lubricant is applied to the rolling stock in a predetermined application distance upstream of the roll gap, the additional lubricant also acts on the rolling stock until it reaches the roll gap.
  • This long exposure time advantageously improves the lubricating effect (the so-called "plate-out") of the additional lubricant in the contact zone compared to application of the additional lubricant to the rolling stock immediately before the roll gap.
  • additional lubrication also increases the Walzgutober vomsauberkeit, ie reduces the remaining on the rolling stock after rolling iron abrasion. Therefore, the additional lubrication can also be used advantageously for the production of rolling stock with increased demands on the Walzgutober horrsauberkeit.
  • An embodiment of the invention provides that the amount of additional lubricant applied to the contact surface of the rolling stock is set as a function of the lubrication requirement determined for the contact zone.
  • the amount of additional lubricant used can be advantageously adapted to the lubrication requirement, so that on the one hand sufficient lubrication of the contact zone is achieved and on the other hand, an excessive amount of additional lubricant, which would cause slippage of the work roll on the rolling stock, is avoided.
  • a further embodiment of the invention provides that as a process parameter for determining the lubrication requirement a Walzgut Irish of the rolling stock and / or a compression strength of the rolling stock and / or roughness of the rolling stock and / or a relative speed between the contact surface of the rolling stock at a reference location and the surface the work roll and / or a thickness of the rolling stock and / or a viscosity of the cooling lubricant is or will be used.
  • the use of the rolling stock speed as a process parameter for the determination of the lubrication requirement is particularly advantageous because the rolling gap friction between the rolling stock and the work rolls and thus the lubrication requirement depend strongly on the Walzgut Irish.
  • the nip friction also depends significantly on the compressive strength and roughness of the rolling stock, which is why these material properties of the rolling stock are advantageous as a process parameter for determining the lubrication need.
  • the consideration of these material properties of the rolling material particularly advantageously allows a product-specific lubrication of the contact zone.
  • the relative speed between the contact surface of the rolling stock and the surface of the work roll depends on the location in which the speed of the contact surface is considered, since the thickness of the rolling stock changes in the contact zone and the contact surface therefore moves faster before the nip and faster behind the nip than the surface of the work roll. Therefore, the relative speed between the contact surface of the rolling stock and the surface of the work roll must be related to a reference location fixed with respect to the nip. This relative speed is a measure of the relative movement of the contact surface to the work roll in the contact zone. This relative movement leads to plastic deformations of the surface microstructure of the rolling stock and thereby influences the distribution of the additive lubricant adhering in depressions of the contact surface, which in turn influences the roll gap friction. Therefore, the relative speed between the contact surface of the rolling stock to a reference location and the surface of the work roll as a process parameter for determining the lubrication requirement is also suitable.
  • the relative speed between the contact surface of the rolling stock and the surface of the work roll at a reference location may be, for example, a current angular velocity and a radius of the work roll, a distance of the reference location from the roll gap, the thicknesses of the rolled material before and after the roll gap and a Walzgut Irish before or calculate behind the nip, see z.
  • the relative speed between the contact surface of the rolling stock and the surface of the work roll at a reference location can thus be determined at least approximately from the aforementioned variables, which can be easily determined by measurements and are usually recorded anyway.
  • a further embodiment of the invention provides that the amount of cooling lubricant introduced into the contact zone is set as a function of the at least one process parameter of the rolling process.
  • the amount of cooling lubricant introduced into the contact zone is set as a function of the at least one process parameter of the rolling process.
  • a further embodiment of the invention provides that the amount of cooling lubricant introduced into the contact zone is reduced when additional lubricant is applied to the contact surface.
  • This embodiment of the invention takes into account that additional lubricant can be washed off again by the cooling lubricant. Therefore, it is useful to reduce the amount of cooling lubricant when additional lubricant is applied to prevent or reduce this washing-off effect of the cooling lubricant.
  • a pure lubricant for example a rolling oil, or a lubricating emulsion, which has a higher lubricant content than the cooling lubricant, is used as additional lubricant.
  • the additional lubricant has a higher lubricating effect than the cooling lubricant, so that even a relatively small amount of additional lubricant lubrication of the contact zone clearly increased.
  • the use of a lubricating emulsion instead of a pure lubricant as an additional lubricant may be advantageous if the additional lubricant should also have a cooling function for cooling the rolling stock in addition to the lubricating effect.
  • inventions of the invention provide that the additional lubricant is applied by spraying onto the rolling stock, and / or that the additional lubricant is applied uniformly over an entire Walzgutbreite of the rolling stock on the contact surface of the rolling stock. These embodiments of the invention advantageously allow a uniform distribution of the additional lubricant in the contact zone.
  • a further embodiment of the invention provides that the additional lubricant is applied with an additional lubrication device to the rolling stock, which is independent of a cooling lubricating device for introducing the cooling lubricant into the contact zone.
  • This embodiment of the invention thus provides for a separation of the trades for the application of the cooling lubricant and the additional lubricant. This advantageously allows a flexible configuration of the entire cooling and lubrication complex for a rolling stand as well as easy retrofitting of existing systems, without having to make changes to their cooling lubricating devices for introducing a cooling lubricant.
  • a further embodiment of the invention provides that the lubrication requirement of the contact zone is determined before the start of the rolling process and / or during the rolling process.
  • a determination of the lubrication requirement before the start of the rolling process allows the at least one process parameter adapted lubrication of the contact zone already at the beginning of the rolling process. Determining the lubrication requirement during the rolling process allows the lubrication to be adjusted to changes in the at least one during the rolling process Process parameters, for example, to changes in Walzgutieri Swiss, compression strength and / or roughness of the rolling stock.
  • a further embodiment of the invention provides that the lubrication requirement of the contact zone is determined using a Stribeck diagram for a friction coefficient of the friction between the contact surface and the work roll in the contact zone as a function of at least one process parameter.
  • Stribeck diagrams are for example off JBAF Smeulders, "Lubrication in the Cold Rolling Process Described by a 3D Stribeck Curve", AISTech 2013 Proceedings, pp. 1681-1689 known.
  • the determination of a friction coefficient of the friction between the contact surface and the work roll in the contact zone advantageously allows a quantitative determination of the lubrication requirement as a function of the determined friction coefficient.
  • the mill stand can be assigned an operating point by means of this function, which determines the coefficient of friction of the roll stand for the respective values of rolling stock speed and the relative speed between the contact surface of the rolling stock and the surface of the work roll taking into account the lubricating properties of the system.
  • This makes possible a very differentiated and the specific lubricating properties of the system adapted determination of the lubrication requirements of the contact zone as a function of the rolling stock and the relative speed between the contact surface of the rolling stock and the surface of the work roll, whereby a more targeted lubrication can be adjusted to the rolling process, for example, in terms of throughput of the Rolling stock, the wear of the work rolls, the lubricant and coolant consumption and / or the required drive power for the work rolls to optimize.
  • a further embodiment of the invention provides that the additional lubricant is applied to two opposing contact surfaces of the rolling stock.
  • different amounts of additional lubricant from the additional lubricant can be applied to the two contact surfaces of the rolling stock.
  • the application of the additional lubricant to both contact surfaces of the rolled material advantageously allows a coordinated lubrication of both contact zones of the rolling stock with the work rolls.
  • the application of mutually different additional lubricant amounts of the additional lubricant on the two contact surfaces in particular allows to influence and optimize a torque distribution between the work rolls.
  • FIG. 1 1 shows a block diagram of a rolling stand 1 for rolling a rolling stock 3, a cooling lubricating device 5 and an auxiliary lubricating device 7.
  • the rolling stock 3 is a metallic rolled strip, for example a steel strip whose thickness is reduced by the rolling.
  • the roll stand 1 has two superposed work rolls 9, 10, which are spaced from each other by a roll gap 11.
  • the work rolls 9, 10 are set in rotation and the rolling stock 3 is pulled through the rolling work rolls 9, 10 in a rolling direction 13 through the nip 11.
  • the rolling stock 3 is in contact zones 15, 16 in the region of the nip 11 with the work rolls 9, 10 in contact with an upper contact surface 17 of the rolled material 3 in a first contact zone 15 abuts the upper work roll 9 and a lower contact surface 18 of the Rolled material 3 in a second contact zone 16 rests against the lower work roll 10.
  • the cooling lubricant is a cooling lubricant emulsion, which consists of a cooling fluid and lubricant, for example, water as a coolant and oil as a lubricant, and possibly of emulsifiers.
  • the main component of the cooling lubricant emulsion is the cooling liquid, while the lubricant content of the cooling lubricant is only a few percent, for example, two to three percent.
  • the cooling lubricant device 5 comprises a coolant lubricant pump 19, at least one coolant lubricant spray bar 21 for each work roll 9, 10, coolant lines 23 and a coolant lubrication controller 25.
  • Each coolant lubricant spray bar 21 includes coolant nozzles for dispensing coolants to the respective work roll 9, 10.
  • the coolant is removed from the coolant lubricant pump 19 pumped through the cooling lubricant lines 23 to the cooling lubricant spray bar 21 and sprayed by the cooling lubricant spray bar 21 on the work rolls 9, 10.
  • the cooling lubricant amounts C respectively discharged from the cooling lubricant spray bars 21 are adjusted by the cooling lubrication controller 25 by driving the cooling lubricant pump 19.
  • cooling lubricant sprayed onto the work rolls 9, 10 is transported to the contact zones 15, 16.
  • an additional lubricant can be applied to the rolling stock 3.
  • the additional lubricant is a pure lubricant, such as a rolling oil, or a lubricating emulsion of a carrier liquid and lubricant, for example, water as a carrier fluid and rolling oil as a lubricant, wherein the lubricant content of the additional lubricant is higher than the lubricant content of the cooling lubricant and, for example, about 20%.
  • the additional lubrication device 7 comprises an additional lubricant pump 27, in each case at least one additional lubricant spray bar 29 for each contact surface 17, 18 of the rolling stock 3, additional lubricant lines 31 and an additional lubrication control 33.
  • Each additional lubricant spray bar 29 points Additional lubricant nozzles for dispensing additional lubricant to the respective contact surface 17, 18.
  • the additive lubricant is pumped from the supplemental lubricant pump 27 through the supplemental lubricant lines 31 to the supplemental lubricant spray bars 29 and sprayed onto the contact surfaces 17, 18 by the supplemental lubricant spray bars 29.
  • the additional lubricant amounts A respectively discharged by the additional lubricant spraying bars 29 are set by the additional lubrication controller 33 by controlling the additional lubricant pump 27. As a result of the movement of the rolling stock 3, additional lubricant sprayed onto the contact surfaces 17, 18 is transported to the contact zones 15, 16.
  • the additional lubricant spraying bars 29 are arranged in a predetermined application distance D with respect to the rolling direction 13 in front of the nip 11 in order to apply the additional lubricant in this application distance D from the nip 11 to the rolling stock 3.
  • the additional lubricant acts on the contact surfaces 17, 18 of the rolling stock 3 until it reaches the nip 11.
  • adhesion of the additional lubricant to the contact surfaces 17, 18 increases. This advantageously improves the lubricating effect (the so-called plate-out) of the additional lubricant in the contact zones 15, 16 compared with application of the additional lubricant to the contact surfaces 17, 18 in front of the nip 11.
  • a lubrication requirement is determined for each contact zone 15, 16 as a function of at least one process parameter of the rolling process.
  • a rolling stock speed v of the rolling stock 3 is used as a process parameter.
  • the rolling stock speed v is, for example, from the additional lubrication control 33 from it supplied measurement signals 35 of a belt speed sensor 37 for detecting a Strip speed of the rolled strip.
  • Optional further process parameters for determining the lubrication requirement are material properties 41 of the respective rolling stock 3, for example a compressive strength and / or a roughness of the rolling stock 3, which are supplied to the additional lubrication control 33 as material property data 41 from a production system 43.
  • relative velocities between the contact surfaces 17, 18 of the rolling stock 3 at fixed reference locations and the surfaces of the work rolls 9, 10 can optionally be used. These relative velocities can be determined, for example, from the rolling stock speed v at a reference location and measuring signals 35 from rotational speed sensors 39 for detecting the rotational speeds of the work rolls 9, 10 and the thicknesses of the rolling stock 3 before and after the nip 11; For example, equation (3.13) Page 113 in H. Hoffmann, R. Neugebauer and G.
  • Further optional process parameters for determining the lubrication requirement are a viscosity of the cooling lubricant and / or a thickness of the rolling stock 3. If required, the cooling lubricant quantities C currently present in the contact zones 15, 16 and / or the lubricant portion of the cooling lubricant can also be detected and used as process parameters become. In addition, control data 45 may be exchanged between the cooling lubrication controller 25 and the auxiliary lubrication controller 33 to match the settings of the cooling lubricant amounts C and the additive lubricant amounts A to each other.
  • the additional lubricant is applied to each contact surface 17, 18 as a function of the lubrication requirement determined for the contact zone 15, 16 of this contact surface 17, 18, when the amount of cooling lubricant C presently introduced into the contact zone 15, 16 is equal to that for the Contact zone 15, 16 does not cover certain lubrication requirements, for example, because Walzgutieri Supreme changes v or a rolling 3 is rolled with an increased compression strength.
  • the amount of cooling lubricant C applied to the work rolls 9, 10 is either kept constant or likewise adjusted depending on the at least one process parameter of the rolling process and / or on the additional lubricant amounts A applied to the contact surfaces 17, 18. See the description of FIG. 2 ,
  • FIG. 2 illustrates a method for rolling a rolling stock 3 with a rolling stand 1, a cooling lubricating device 5 and an additional lubricating device 7, each according to FIG. 1 are formed.
  • FIG. 2 shows FIG. 2 as a function of a time t curves v (t), C (t), A (t) a rolling stock speed v of the rolling stock 3, a cooling lubricant amount C, which is applied to a work roll 9, 10 of the roll stand 1 with the cooling lubricating device 5, and an additional lubricant amount A, which is applied with the additional lubrication device 7 to a contact surface 17, 18 of the rolling stock 3, which contact is located in a contact zone 15, 16 on the work roll 9, 10.
  • the amount of cooling lubricant C and the amount of additional lubricant A are in each case defined as volume applied per unit of time.
  • FIG. 2 shows a case in which the rolling stock 3 consists of different Partwalzb Sn, which are welded together.
  • the rolling stock 3 consists of different Partwalzb Sn, which are welded together.
  • first between times t 0 and t 4 a first part-rolled strip is rolled.
  • times t 4 and t 5 a first transition region between the first part-rolling band and a second part-rolling band is rolled with a first weld joining these two part-rolling bands.
  • the second between times t 5 and t 8
  • the second between times t 8 and t 9
  • a second transitional area between the second partial rolling belt and a third partial rolling belt is rolled with a second weld joining these two partial rolling belts.
  • the third Clauswalzband rolled.
  • the second Operawalzband has a higher compression strength than the first Operawalzband and the third Operawalzband which have the same compression strength.
  • the cooling lubricant quantity C and the additional lubricant quantity A are respectively set by the cooling lubricant control 25 and the additional lubrication control 33 as a function of a lubrication requirement for the contact zone 15, 16 as a function of the rolling stock speed v and of the compression strength of the respective subband and optionally of further above determined process parameters is determined.
  • a so-called Stribeck diagram is used for a friction coefficient of the friction between the contact surface 17, 18 and the work roll 9, 10 in the contact zone 15, 16 as a function of the process parameters, for example JBAF Smeulders, "Lubrication in the Cold Rolling Process Described by a 3D Stribeck Curve", AISTech 2013 Proceedings, pp. 1681-1689 is known.
  • the first partial rolling belt is rolled at a first rolling speed v 1 .
  • the rolling stock speed v is increased to a second Walzgut Irish v 2 .
  • the second rolling speed v 2 is maintained until the time t 3 .
  • the lubrication requirement can be covered by cooling lubricant alone between the times t 0 and t 3 , so that no additional lubricant is applied.
  • the increase in the rolling stock speed v from the first rolling stock speed v 1 to the second Rolling speed v 2 increases the lubrication requirement.
  • the increased lubrication requirement is covered by a corresponding increase in the amount of cooling lubricant C.
  • the rolling stock speed v is greatly reduced v of the second rolling stock speed v 2 to a third rolling stock 3 to prepare the rollers of the first transition region between the first part of the rolled strip and the second part rolled strip with the first weld.
  • the first transition region is then rolled between the times t 4 and t 5 with the third rolling speed v 3 .
  • the rolling stock speed v between the times t 5 and t 6 is increased to a fourth rolling stock speed v 4 , with which the second partial rolling band between the times t 6 and t 7 is rolled.
  • the lubrication requirement for the rolling of the first transition region increases compared to the lubrication requirement for the rolling of the first partial rolling belt due to the very low third Walzgut Irish v 3rd
  • the lubrication requirement for the rolling of the second sectionwalzbandes is even higher than the lubrication requirement for rolling the first transitional range due to the high compression strength of the second Operawalzbandes. Therefore, from the time t 3 additional lubricant applied, wherein for the rolling of the second Partwalzbandes between the times t 6 and t 7 a larger amount of additional lubricant A is applied as for the rolling of the first transition region between the times t4 and t 5 .
  • the applied amount of cooling lubricant C between the times t 3 and t 6 is reduced and kept constant between the times t 6 and t 7 , to prevent or reduce a washing off of applied additional lubricant by the cooling lubricant.
  • the rolling stock speed v is reduced from the fourth rolling stock speed v 4 back to the third Walzgut Irish v 3 to prepare the rolling of the second transitional area between the second Operawalzband and the third Generalwalzband with the second weld.
  • the second transition region is then rolled between times t 8 and t 9 at the third rolling speed v 3 .
  • the rolling stock speed v is between the instants t 9 and t 10 in the second rolling stock speed v 2 is increased, with the third part of the rolled strip between the times t 10 and t is rolled. 11
  • the applied additional lubricant amount A is first reduced for the rolling of the second transition region, and for the rolling of the third partial rolling belt with the second rolling material v 2 no additional lubricant is applied. At the same time, the applied amount of cooling lubricant C is increased again.
  • the rolling stock speed v 2 is reduced from the second rolling speed v 2 to a fifth rolling speed v 5 , with which the third part-rolling band is rolled from the time t 12 .
  • FIG. 3 schematically shows a rolling mill 47 of a rolling mill with a plurality of successively arranged rolling stands 1 for rolling a rolled material 3.
  • the rolling stands 1 each have two superimposed work rolls 9, 10 and for each work roll on a support roller 49.
  • the rolling train 47 has for each roll stand 1 in FIG. 3 Cooling device 5, not shown, and an additional lubricating device 7.
  • the cooling lubricating devices 5 are each as in FIG. 1 illustrated cooling lubricating device 5 is formed and the additional lubricating devices 7 are each as in FIG. 1 illustrated additional lubrication device 7, wherein the additional lubricant spraying 29 each additional lubrication device 7 are arranged in the Aufbringabstand D with respect to the rolling direction 13 in front of the nip 11 of the associated rolling mill 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Lubricants (AREA)
EP16167662.2A 2016-04-29 2016-04-29 Procede de laminage d'un produit de laminage Withdrawn EP3238843A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP16167662.2A EP3238843A1 (fr) 2016-04-29 2016-04-29 Procede de laminage d'un produit de laminage
US16/094,911 US11161161B2 (en) 2016-04-29 2017-04-28 Method for rolling a product to be rolled
EP17723941.5A EP3448592B1 (fr) 2016-04-29 2017-04-28 Procede de laminage d'un produit de laminage
PCT/EP2017/060193 WO2017186910A1 (fr) 2016-04-29 2017-04-28 Procédé pour laminer une matière à laminer
MX2018012916A MX2018012916A (es) 2016-04-29 2017-04-28 Metodo para laminar un material laminado.
RU2018133704A RU2701916C1 (ru) 2016-04-29 2017-04-28 Способ прокатки прокатываемого материала
JP2018556441A JP6820349B2 (ja) 2016-04-29 2017-04-28 圧延すべき製品を圧延するための方法
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JP2019514693A (ja) 2019-06-06
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EP3448592B1 (fr) 2020-01-22
RU2701916C1 (ru) 2019-10-02
JP6820349B2 (ja) 2021-01-27
MX2018012916A (es) 2019-05-22
WO2017186910A1 (fr) 2017-11-02
US11161161B2 (en) 2021-11-02
EP3448592A1 (fr) 2019-03-06

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