EP2905090A1 - Verfahren zum Walzen von Metallstreifen oder -folie - Google Patents

Verfahren zum Walzen von Metallstreifen oder -folie Download PDF

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Publication number
EP2905090A1
EP2905090A1 EP14000439.1A EP14000439A EP2905090A1 EP 2905090 A1 EP2905090 A1 EP 2905090A1 EP 14000439 A EP14000439 A EP 14000439A EP 2905090 A1 EP2905090 A1 EP 2905090A1
Authority
EP
European Patent Office
Prior art keywords
foil
liquid air
strip
rolling
metal strip
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Withdrawn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
EP14000439.1A
Other languages
English (en)
French (fr)
Inventor
Sören Wiberg
Akin Malas
Roger Andersson
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.)
Linde GmbH
Original Assignee
Linde 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
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to EP14000439.1A priority Critical patent/EP2905090A1/de
Publication of EP2905090A1 publication Critical patent/EP2905090A1/de
Withdrawn legal-status Critical Current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
    • 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
    • B21B45/0206—Coolants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys

Definitions

  • the invention relates to the field of roll cooling for rolling mills, especially aluminium strip or foil rolling mills.
  • Aluminium rolling in rolling mills requires lubrication in order to achieve an acceptable finish of the strip, especially at higher reductions. Also, the rolling process generates a large amount of heat, which must be dissipated in order to prevent the equipment, especially the rolls of the rolling mill, and/or the aluminium strip being rolled from overheating. Thus, efficient cooling of the rolls is required.
  • cryogenic gases or liquids as a coolant in industrial rolling processes. This is discussed for example in PCT/GB2009/051590 .
  • cryogenic shall refer to substances which are normally gases at room temperature, but are maintained in liquid state by suitable control of temperature and pressure.
  • PCT/GB2009/051590 especially describes the use of cryogenic nitrogen.
  • Use of nitrogen as a coolant can, however, lead to an oxygen deficiency in the vicinity of the rolling mill.
  • elaborate safety measures are required.
  • PCT/GB2009/051590 suggests provision of a construction comprising an inner chamber and an outer chamber provided with extraction points and valves, by means of which it is attempted to control the extraction rate of the inner chamber to ensure that the outer chamber is always held at a negative pressure compared to the operator areas, thus minimizing gas emissions from the outer chamber, ensuring the safety of the mill operator.
  • This double chamber construction is considered to be expensive to provide and maintain.
  • the object of the invention is thus to be able to provide a simplified construction for the above discussed rolling mills. This object is achieved by utilizing a method according to claim 1.
  • any danger of a reduction of oxygen levels in the vicinity of a rolling mill can be avoided, as the liquid air used as cryogenic coolant has the same chemical composition as the ambient air.
  • elaborate constructions for containing coolants subsequently to their usage are not necessary.
  • liquid air is directed to one or more of a plurality of zones on the surface of at least one of the work rolls through which the metal strip is passed via cryogenic fluid applicators.
  • this plurality of zones may be provided along the width of the work rolls (thus also along the width of the metal strip passing through the work rolls), so that an effective control of the cooling process is possible.
  • the metal strip or foil is coated with a lubricant before being passed through the work rolls.
  • a liquefaction unit is, essentially, a simplified version of an air separation unit, in which ambient air is initially cooled down into temperatures, at which it liquifies. Subsequent means for separation of liquified air into its individual components are, according to the invention, not necessary.
  • Liquefaction units can be provided in a cost effective manner, so that especially the on-site combination of a rolling mill employing the method of the invention and a liquefaction unit is advantageous, taking into account the large amounts of cryogenic coolant needed.
  • liquid air as synthetic liquid air by mixing liquid oxygen with liquid nitrogen as well as, if desired, with other air components, such as carbon dioxide.
  • the method of the invention is advantageously used in connection with the rolling of aluminium strips or foils.
  • FIG 1 there is shown schematically a preferred embodiment of a rolling mill 10, with which the method according to the invention can be implemented.
  • a preferred feature of rolling mill 12 is presented in Figure 2 .
  • an aluminium strip or foil 12 passes through the rolling mill from left to right (indicated by arrow 11).
  • Interacting mill rolls 13 and back up rolls 14 are provided to perform the reduction in thickness of the strip 12, as is known in the art.
  • a lubricant is applied to strip 12, preferably on both sides.
  • a cryogenic storage and delivary system 15 supplies cryogenic coolant to coolant applicators 17, for example via insulated and protected feed pipes 16.
  • System 15 is preferably implemented as an on-site a liquefaction unit.
  • the coolant applicators 17 can be divided into seperate zones accross the width of the strip 12 in order to apply different or variable cooling effects accros the width of the rolls, for example to provide a flatness controll for the strip 12.
  • heating devices 18 on the entry side of the mill. These heating devices 18 may be provided anywhere of the vicinity of the work rolls 13, taking into account mill size, space and heating effect.
  • the heating devices 18 can also be divided into separate zones over the width of the strip 12 or the rolls 13 in order to apply corresponding separate heating effects.
  • a (not shown) control system is used to ensure that the metal rolling process provides the desired properties to the strip 12, espcially regarding thickness and/or flatness.
  • cryogenic coolant it is advantageous to direct the cryogenic coolant to an area designated 21 in Figure 2 .
  • This area can be referred to the "arc” area, as opposed to an area 24 adjacent to where the strip comes into contact with the rolls 13, referred to as “wedge area", of work rolls 13 in order to effectively limit application of cryogenic coolant to area 21, shields 22 can be provided, as shown in Figure 2 .
  • arc area 21 may be longer or shorter, as well as in a different circumferential position as compared to the one shown in Figure 2 by way of example only.
  • liquid air is used as cryogenic coolant, i.e. liquid air is applied to the metal sheet 12 by means of cryogenic cooling applicators 17.
  • composition of liquid air corresponds to that of the surrounding (gaseous) air
  • equipment for monitoring any oxygen deficiencies in the vicinity of the mill can be omitted.
  • Utilization of liquid air also assists in providing a dry internal atmosphere in the vicinity of the mill, thereby reducing the risk of any icing inside the mill.
  • all water is removed and the liquefied air contains essentially not water.
  • use of liquefied or liquid air for the cooling inside the mill will not create any icing.
  • the main advantage over liquid nitrogen is safety. Liquid nitrogen also contains no water, but use of it inside the mill without any safety precautions will be extremely dangerous in the surroundings, and especially to the operators working at the mill. Therefore by using air, all of the extra safety precautions can be avoided.
  • cryogenic air for the cryogenic storage and delivery system 5.
  • cryogenic air by using an air liquefaction unit (as already mentioned above), which serves to cool gaseous air down to temperatures, at which it liquifies. This method is especially preferred, as typical quantities of cryogenic coolant required by a rolling mill justify an on-site production unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Metal Rolling (AREA)
EP14000439.1A 2014-02-06 2014-02-06 Verfahren zum Walzen von Metallstreifen oder -folie Withdrawn EP2905090A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14000439.1A EP2905090A1 (de) 2014-02-06 2014-02-06 Verfahren zum Walzen von Metallstreifen oder -folie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14000439.1A EP2905090A1 (de) 2014-02-06 2014-02-06 Verfahren zum Walzen von Metallstreifen oder -folie

Publications (1)

Publication Number Publication Date
EP2905090A1 true EP2905090A1 (de) 2015-08-12

Family

ID=50112670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14000439.1A Withdrawn EP2905090A1 (de) 2014-02-06 2014-02-06 Verfahren zum Walzen von Metallstreifen oder -folie

Country Status (1)

Country Link
EP (1) EP2905090A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109201740A (zh) * 2018-11-15 2019-01-15 中南大学 一种制备高密度孪晶中熵合金的多阶段深冷轧制方法
CN110396633A (zh) * 2019-05-20 2019-11-01 东北大学 一种超细晶双峰组织中熵合金的制备方法
CN112517636A (zh) * 2020-11-24 2021-03-19 福州大学 一种工业纯钛板材的深低温加工成形方法
CN112705582A (zh) * 2021-01-28 2021-04-27 李艳峰 一种铅箔成形方法
CN112893466A (zh) * 2021-01-19 2021-06-04 太原理工大学 一种基于激光能场辅助轧制极薄带的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE563761C (de) * 1932-11-09 Fried Krupp Grusonwerk Akt Ges Vorrichtung zum Kuehlen der Walzen bei Walzwerken
DE742991C (de) * 1941-03-28 1943-12-15 Demag Ag Kuehlung der Walzen von Walzwerken
DE102005001806A1 (de) * 2005-01-13 2006-07-20 Air Liquide Deutschland Gmbh Verfahren zum Kaltwalzen von metallischem Walzgut

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE563761C (de) * 1932-11-09 Fried Krupp Grusonwerk Akt Ges Vorrichtung zum Kuehlen der Walzen bei Walzwerken
DE742991C (de) * 1941-03-28 1943-12-15 Demag Ag Kuehlung der Walzen von Walzwerken
DE102005001806A1 (de) * 2005-01-13 2006-07-20 Air Liquide Deutschland Gmbh Verfahren zum Kaltwalzen von metallischem Walzgut

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109201740A (zh) * 2018-11-15 2019-01-15 中南大学 一种制备高密度孪晶中熵合金的多阶段深冷轧制方法
CN110396633A (zh) * 2019-05-20 2019-11-01 东北大学 一种超细晶双峰组织中熵合金的制备方法
CN112517636A (zh) * 2020-11-24 2021-03-19 福州大学 一种工业纯钛板材的深低温加工成形方法
CN112893466A (zh) * 2021-01-19 2021-06-04 太原理工大学 一种基于激光能场辅助轧制极薄带的方法
CN112705582A (zh) * 2021-01-28 2021-04-27 李艳峰 一种铅箔成形方法

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