WO2013175158A1 - Rolling mill temperature control - Google Patents
Rolling mill temperature control Download PDFInfo
- Publication number
- WO2013175158A1 WO2013175158A1 PCT/GB2013/000223 GB2013000223W WO2013175158A1 WO 2013175158 A1 WO2013175158 A1 WO 2013175158A1 GB 2013000223 W GB2013000223 W GB 2013000223W WO 2013175158 A1 WO2013175158 A1 WO 2013175158A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rolls
- roll
- flatness
- strip
- measuring device
- Prior art date
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 22
- 239000002826 coolant Substances 0.000 claims abstract description 27
- 239000000314 lubricant Substances 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000011888 foil Substances 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000005461 lubrication Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 239000004411 aluminium Substances 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 230000006698 induction Effects 0.000 abstract description 4
- 230000004087 circulation Effects 0.000 abstract description 2
- 230000008602 contraction Effects 0.000 abstract description 2
- 238000004886 process control Methods 0.000 abstract description 2
- 238000011217 control strategy Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 15
- 239000003350 kerosene Substances 0.000 description 10
- 230000009467 reduction Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000010186 staining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004924 electrostatic deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/08—Lubricating, cooling or heating rolls internally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B27/106—Heating the rolls
-
- 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
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/08—Lubricating, cooling or heating rolls internally
- B21B2027/083—Lubricating, cooling or heating rolls internally cooling internally
Definitions
- the invention relates to the field of aluminium strip or foil rolling mills, and describes a new process which will improve the temperature control of the mil) rolls to improve strip flatness, and will enable a dedicated lubricant to be applied to the rolls to increase productivity and give other safety and product quality benefits.
- a small number of mills use a water based emulsion as lubricant.
- This system has the advantage of using a liquid with a high cooling capacity, and the oil content and constitution can be optimized to give good lubricating properties.
- these emulsions may cause staining of the material unless they are removed completely from the strip. This can be achieved by installing sophisticated systems to remove the coolant, and by ensuring that the material exit temperature always significantly exceeds 100 deg C.
- Kerosene was found to be the best compromise between cooling and lubrication properties, with few strip marking problems. However, kerosene is both a poor cooling medium due to its low specific heat capacity, and has poor lubricating properties compared to dedicated lubricants. In addition there are significant fire safety and EHS issues associated with its use and storage.
- the coolant medium is applied externally to the rolls by means of row(s) of spray nozzles which apply the coolant directly to the exterior of the rolls.
- the coolant sprays have a further use in the control of the strip flatness.
- the strip may become unflat during the rolling process due to differing reductions in thickness taking place at different points across the strip width. This difference in reduction is due to the difference in the shape of the working roll across its width, and a consequent difference in the gap between the rolls.
- a number of patents (e.g. GB2012198, EP41863) illustrate the use of varying the cooling rate across the width of the roll(s), which, in conjunction with a strip flatness measuring device, can directly control the flatness of the rolled strip.
- GB2156255 describes a process which employs separate lubrication and cooling (SLC). Banks of water jets are used to cool the rolls externally and effect strip flatness control, whilst low quantities of a more suitable lubricating oil are applied directly to the strip. Sealed boxes are used to prevent water contacting the material.
- SLC separate lubrication and cooling
- US20070175255 discloses a method for cold rolling in which a number of nozzles are used to apply various combinations of lubricant emulsion or base oil, coolant and inert gas are applied to the wedge and arc areas of upper and lower work rolls, for the purpose of cleaning, cooling, lubrication.
- Flatness control is alluded to, but is it described as being achieved by using a combination of inert gas and conventional coolants applied to the exterior of the work rolls.
- USD 20110308288A1 describes a rolling mill temperature control system using induction heaters and dedicated lubrication system, however the bulk cooling of the rolls is performed externally, by means of cryogenic gas.
- an apparatus for rolling a metal foil or strip may comprise a pair of working rolls arranged to receive the strip in a nip region there between: said working rolls will contain one or more internal channels through which a cooling medium (liquid or gas) will be directed, and a means for heating one or more of a plurality of zones on the exterior of the working roll or rolls and a device for introducing a lubricating medium into the interface between the working rolls and the material.
- a cooling medium liquid or gas
- an apparatus may comprise a flatness measuring device arranged to provide a signal indicative of the flatness of the metal strip after it passes from the roll.
- an apparatus may further comprise means for varying the application of heat to the one or more zones, responsive to said signal.
- the flatness measuring device can be arranged to measure the profile of the roll.
- an apparatus may comprise a lubricant supply system and means for directing the lubricant to the rolls or strip or both.
- lubricant supply may have the ability to be varied in volume by manual or automatic means.
- this apparatus can manually or automatically select between one or more different lubricants.
- a means of controlling the temperature of the works rolls during rolling the work rolls will be internally cooled by coolant channels inside the rolls. These channels may be single or multiple, and may be radial or longitudinal or spiral within the roll.
- the cooling medium will be supplied at volumes and temperatures controlled automatically by a process control system, or manually controlled. According to a further embodiment, this internal cooling can be controlled at varying levels to enable faster warm up of cold rolls, and cooling of hot rolls prior to further processing on and off the machine for example, roll grinding.
- a method of controlling the shape of a metal or strip may comprise heating one or more of the plurality of zones on one or more rolls via one or more heating devices, thereby controlling the radial size of the roll across the rolls width.
- the heating elements may be controlled independently for top and bottom rolls.
- the heating elements may be placed on the exit or entry or both sides of the work rolls.
- an apparatus may further comprise the steps of: arranging a strip flatness measuring device to provide a signal indicative of flatness of the metal strip after it passes from the rolls: receiving data from the flatness measuring device and varying the application of heat to one or more zones and one or more rolls, responsive to such data.
- application of heat to one or more zones or rolls can be manually varied by a human operator.
- heating may be applied to zones of the roll or rolls outside the strip rolling width to accomplish heating of the rolls to achieve a change in the radial size of the roll or rolls to reduce any edge defects in the strip, such as tight edges.
- FIG 1 shows a side view of a rolling mill according to various embodiments.
- a pair of internally cooled working rolls contain an internal labyrinth which may be straight or curved in shape.
- the coolant may be liquid or gas.
- the cooling rate may be adjusted automatically or manually to maintain the desired roll temperature. This adjustment may be performed by a flatness control system, or derived from process modelling calculations.
- one or more roll heating devices may be in the form of a fixed bank of heaters, or may be one or more moving heaters which traverse the length of the roll(s).
- these heaters may be used to perform additional heating adjacent to the strip edge to improve the strip edge condition.
- these heaters may be split either physically or logically into control zones. This heater or heaters may be applied to one or both rolls, and may be mounted on either side of the roll.
- a flatness measuring system in conjunction with a flatness measuring device mounted on the exit side of the mill varies the amount of heating applied to the control zones in order to produce the desired strip shape.
- the flatness control system is realised by a human operator who manually varies the amount of heating responsive to data provided by the flatness measuring device.
- an electronic controller is provided and arranged to vary the heating responsive to such data.
- Separate rolling lubricant is applied to the strip or to the rolls, or to both, by means of a lubrication spray bar or electrostatic deposition.
- the type and volume of lubricant applied may be adjusted automatically or by manual control.
- the full width heating control enables fast and effective response to reduce flatness errors, and can be used to prepare the roll temperature profiles in the cases of width changes or cold starts.
- Kerosene storage tanks and circulations systems including heaters and coolers.
- Kerosene filtration plant with associated benefits in the disposal of the filter media.
- Mill civil works are signif icantly simplified as the need for cellars and oil catchment trays are removed.
- FIG 1 shows a schematic diagram of a rolling mill stand 1 according to various embodiments with aluminium strip or foil 2 passing through the stand from left to right as arrowed.
- the mill work rolls 3 and back up rolls 4 are loaded and rotated in order to perform the reduction in thickness of the metal.
- the strip 2 Before entering the work roll gap the strip 2 has a suitable lubricant applied by the lubrication system 5.
- the volume and type of lubricant applied may be varied manually or automatically, depending on
- Page 6 parameters including but not limited to strip thickness, mill speed, work roll roughness. It may be possible to direct the lubrication flow to the strip, the work rolls or to both
- the temperature and therefore the diameter of the works rolls is controlled in two ways.
- a cooling medium is circulated through channels inside the work rolls 3 from a cooling system 6 to
- This cooling medium may be liquid or gaseous.
- the flow rate and temperature of the cooling medium may be varied manually or automatically
- heaters 7 (shown in this case on the exit side of the rolls, but may be installed on either exit or entry or both) will control the localised heating of the work roll or rolls. These heaters may operate singly or in banks, and will apply varying heating effects across the width of the rolls(s). In the case of single heater operation, the heater or heaters will traverse the length of the roll or rolls, applying the varying heating described above.
- These heaters may derive their adjustments from a flatness measuring system 8 and associated flatness control system 9, or may be manually controlled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
For controlling the temperature of the working rolls and hence the flatness of the material during the rolling of aluminium strip or foil, the system consists of a set of internally cooled work rolls, and a means to externally heat these rolls by induction heating. The rails are internally cooled by means of circulation of cooling medium. An additional strip lubrication device applies a dedicated lubricant to the roll and/or material to lubricate the process. The induction heater(s) may be split into individually controllable zones, controlled by a process control system which determines the control strategy from either a strip flatness measuring device or a predictive process model in order, by thermal growth/contraction, to create the best roll profile for rolling flat strip.
Description
Description
Technical Field
The invention relates to the field of aluminium strip or foil rolling mills, and describes a new process which will improve the temperature control of the mil) rolls to improve strip flatness, and will enable a dedicated lubricant to be applied to the rolls to increase productivity and give other safety and product quality benefits.
Background
The process of rolling aluminium requires lubrication in order to gain a satisfactory surface finish of the strip at higher reductions. However, even with lubrication, the rolling process generates heat which must be removed. Traditionally this has been achieved in one of two ways:
A small number of mills use a water based emulsion as lubricant. This system has the advantage of using a liquid with a high cooling capacity, and the oil content and constitution can be optimized to give good lubricating properties. However, these emulsions may cause staining of the material unless they are removed completely from the strip. This can be achieved by installing sophisticated systems to remove the coolant, and by ensuring that the material exit temperature always significantly exceeds 100 deg C.
In practice the complete removal of the coolant is difficult to achieve so this method has had limited usage.
The vast majority of mills rolling aluminium foil or strip use kerosene as both coolant and lubricant. Kerosene was found to be the best compromise between cooling and lubrication properties, with few strip marking problems. However, kerosene is both a poor cooling medium due to its low specific heat capacity, and has poor lubricating properties compared to dedicated lubricants. In addition there are significant fire safety and EHS issues associated with its use and storage.
Due to the low Specific Heat Capacity of kerosene, it is necessary to use relatively large flow rates to achieve the desired cooling effect, delivered by complicated pump and spray systems. These large flow rates coupled with the high temperature of the material leaving the rolls results in the generation of large amounts of fumes, which must be extracted from the machine and the working area, and then cleaned from the air before exhausting the air to atmosphere.
In both the above solutions the coolant medium is applied externally to the rolls by means of row(s) of spray nozzles which apply the coolant directly to the exterior of the rolls.
In addition to the bulk cooling process described above, the coolant sprays have a further use in the control of the strip flatness.
The strip may become unflat during the rolling process due to differing reductions in thickness taking
place at different points across the strip width. This difference in reduction is due to the difference in the shape of the working roll across its width, and a consequent difference in the gap between the rolls.
It has been found that by varying the cooling of the rolls across the width by means of localised control of the coolant sprays, this leads to a differing thermal expansion/contraction across the roll, which can compensate for the local variations in roll gap.
A number of patents (e.g. GB2012198, EP41863) illustrate the use of varying the cooling rate across the width of the roll(s), which, in conjunction with a strip flatness measuring device, can directly control the flatness of the rolled strip.
GB2156255 describes a process which employs separate lubrication and cooling (SLC). Banks of water jets are used to cool the rolls externally and effect strip flatness control, whilst low quantities of a more suitable lubricating oil are applied directly to the strip. Sealed boxes are used to prevent water contacting the material.
682080719 describes the use of electrical induction heaters to locally heat the work roll(s) in the area of the strip edges, in order to reduce the phenomenon of "Tight Edge". These inductors partially heat the exterior of the roll to prevent the under rolling of the strip and hence a tight edge, which is a major limit to rolling speed and a contributor to strip breaks.
US20070175255 discloses a method for cold rolling in which a number of nozzles are used to apply various combinations of lubricant emulsion or base oil, coolant and inert gas are applied to the wedge and arc areas of upper and lower work rolls, for the purpose of cleaning, cooling, lubrication. Flatness control is alluded to, but is it described as being achieved by using a combination of inert gas and conventional coolants applied to the exterior of the work rolls.
USD 20110308288A1 describes a rolling mill temperature control system using induction heaters and dedicated lubrication system, however the bulk cooling of the rolls is performed externally, by means of cryogenic gas.
Summary
According to an embodiment, an apparatus for rolling a metal foil or strip may comprise a pair of working rolls arranged to receive the strip in a nip region there between: said working rolls will contain one or more internal channels through which a cooling medium (liquid or gas) will be directed, and a means for heating one or more of a plurality of zones on the exterior of the working roll or rolls and a device for introducing a lubricating medium into the interface between the working rolls and the material.
According to a further embodiment, an apparatus may comprise a flatness measuring device arranged to provide a signal indicative of the flatness of the metal strip after it passes from the roll. According to a further embodiment, an apparatus may further comprise means for varying the application of heat to the one or more zones, responsive to said signal.
According to another embodiment, the flatness measuring device can be arranged to measure the profile of the roll.
According to another embodiment, an apparatus may comprise a lubricant supply system and means for directing the lubricant to the rolls or strip or both. Such lubricant supply may have the ability to be varied in volume by manual or automatic means. According to a further embodiment, this apparatus can manually or automatically select between one or more different lubricants.
According to another embodiment, a means of controlling the temperature of the works rolls during rolling, the work rolls will be internally cooled by coolant channels inside the rolls. These channels may be single or multiple, and may be radial or longitudinal or spiral within the roll. The cooling medium will be supplied at volumes and temperatures controlled automatically by a process control system, or manually controlled. According to a further embodiment, this internal cooling can be controlled at varying levels to enable faster warm up of cold rolls, and cooling of hot rolls prior to further processing on and off the machine for example, roll grinding.
According to a further embodiment, a method of controlling the shape of a metal or strip may comprise heating one or more of the plurality of zones on one or more rolls via one or more heating devices, thereby controlling the radial size of the roll across the rolls width. The heating elements may be controlled independently for top and bottom rolls. The heating elements may be placed on the exit or entry or both sides of the work rolls.
According to a further embodiment of the method, an apparatus may further comprise the steps of: arranging a strip flatness measuring device to provide a signal indicative of flatness of the metal strip after it passes from the rolls: receiving data from the flatness measuring device and varying the application of heat to one or more zones and one or more rolls, responsive to such data. According to a further embodiment, application of heat to one or more zones or rolls can be manually varied by a human operator.
According to a further embodiment, heating may be applied to zones of the roll or rolls outside the strip rolling width to accomplish heating of the rolls to achieve a change in the radial size of the roll or rolls to reduce any edge defects in the strip, such as tight edges.
Description of the Drawing:
The invention will now be described, by a non-limiting example, with reference to FIG 1, which shows a side view of a rolling mill according to various embodiments.
Detailed Description
Embodiments offer a new improved cooling and flatness control technology to be conceived with the following features:
A pair of internally cooled working rolls. The rolls contain an internal labyrinth which may be straight or curved in shape. The coolant may be liquid or gas. The cooling rate may be adjusted automatically or manually to maintain the desired roll temperature. This adjustment may be performed by a flatness control system, or derived from process modelling calculations.
Additionally, one or more roll heating devices. These devices may be in the form of a fixed bank of heaters, or may be one or more moving heaters which traverse the length of the roll(s).
In addition, these heaters may be used to perform additional heating adjacent to the strip edge to improve the strip edge condition.
For both fixed and moving solutions, these heaters may be split either physically or logically into control zones. This heater or heaters may be applied to one or both rolls, and may be mounted on either side of the roll.
A flatness measuring system in conjunction with a flatness measuring device mounted on the exit side of the mill varies the amount of heating applied to the control zones in order to produce the desired strip shape. In its simplest form, the flatness control system is realised by a human operator who manually varies the amount of heating responsive to data provided by the flatness measuring device. In a more sophisticated embodiment, an electronic controller is provided and arranged to vary the heating responsive to such data.
Separate rolling lubricant is applied to the strip or to the rolls, or to both, by means of a lubrication spray bar or electrostatic deposition. The type and volume of lubricant applied may be adjusted automatically or by manual control.
This system offers numerous and large benefits over the prior art.
The complete removal of kerosene as a roll coolant significantly reduces the risk of and consequences of a fire on the mill, therefore removing the need to install expensive fire protection equipment.
The complete removal of kerosene as a roll coolant significantly reduces the environment impact of the
cold rotting process, due to the reduction of hydrocarbon release into the atmosphere.
The full width heating control enables fast and effective response to reduce flatness errors, and can be used to prepare the roll temperature profiles in the cases of width changes or cold starts.
The ability to control the bulk temperature of the rolls by means of the internal cooling will result in faster warm up time of the work rolls after cold starts.
The application of a very small amount of rolling lubricant to the strip prior to rolling will lead to the following benefits over existing systems:
Optimisation of oil properties for lubrication only, allowing larger reductions to be taken for a given set of mill parameters, leading to higher production output.
Reduced incidence of coil staining due to excess lubricant left on the material after rolling, leading to a higher product yield.
Reduced incidence of coil staining due to contamination of the roll coolant by hydraulic oil leading to a higher product yield.
Reduced annealing times and no requirement to use inert gas annealing to avoid coil staining, leading to lower costs.
Additionally, the removal of kerosene and replacement with a liquid or gas coolant removes the requirement for the following pieces of equipment and their associated operating costs:
Kerosene storage tanks and circulations systems, including heaters and coolers.
Exhaust gas treatment equipment to remove kerosene fumes from the exhausted air.
Kerosene filtration plant, with associated benefits in the disposal of the filter media.
Mill civil works are signif icantly simplified as the need for cellars and oil catchment trays are removed.
FIG 1 shows a schematic diagram of a rolling mill stand 1 according to various embodiments with aluminium strip or foil 2 passing through the stand from left to right as arrowed. The mill work rolls 3 and back up rolls 4 are loaded and rotated in order to perform the reduction in thickness of the metal.
Before entering the work roll gap the strip 2 has a suitable lubricant applied by the lubrication system
5. The volume and type of lubricant applied may be varied manually or automatically, depending on
Page 6 parameters including but not limited to strip thickness, mill speed, work roll roughness. It may be possible to direct the lubrication flow to the strip, the work rolls or to both
The temperature and therefore the diameter of the works rolls is controlled in two ways.
Firstly a cooling medium is circulated through channels inside the work rolls 3 from a cooling system 6 to
control the average temperature of the rolls. This cooling medium may be liquid or gaseous. The flow rate and temperature of the cooling medium may be varied manually or automatically
Secondly, heaters 7 (shown in this case on the exit side of the rolls, but may be installed on either exit or entry or both) will control the localised heating of the work roll or rolls. These heaters may operate singly or in banks, and will apply varying heating effects across the width of the rolls(s). In the case of single heater operation, the heater or heaters will traverse the length of the roll or rolls, applying the varying heating described above.
These heaters may derive their adjustments from a flatness measuring system 8 and associated flatness control system 9, or may be manually controlled.
Claims
1. An apparatus for rolling a metal foil or strip comprising:
a pair of internally cooled working rolls arranged to receive the material in a nip region therebetween;
one or more heating elements arranged in zones to heat the outside of one or both of aforesaid rolls,
apparatus comprising a lubricant supply and means for directing the lubricant to the material upstream of the work rolls or to the work rolls
2. Apparatus according to claim 1 further comprising a flatness measuring device arranged to provide a signal indicative of the flatness of the material after it passes from the roll.
3. Apparatus according to claim 2, further comprising means for varying the application of heat to the one or more 2ones, either manually or in response to said signal
4. Apparatus according to claim 3, comprising a processor arranged to receive data from the flatness measuring device and to control at least one of the heating devices, thereby varying the application of heat to the one or more zones
5. Apparatus according to claim 1, wherein the flatness measuring device is arranged to measure the profile of the roll(s).
6. Apparatus according to claim 1, wherein the flatness measuring device is arranged to directly measure the flatness of the metal strip.
7. Apparatus according to claim 1, further comprising a lubricant supply and means for directing the lubricant to the strip or the roll surface, or both.
8. Apparatus according to claim 1, to adjust the lubricant and the volume of lubricant in response to automatic control or manual operator actions.
9. Apparatus according to claim 1 to adjust the temperature and volume of the cooling medium supplied to the work rolls, in response to automatic control or manual operator actions
10. A method of controlling the shape of a metal strip or foil during rolling, said method comprising controlling the bulk temperature of the work rolls by means of delivering a cooling medium to the internal chambers of the rolls, and heating one or more of the plurality of zones on the surface of the roll via one or more heating devices, thereby controlling the radial size of the roll or rolls across the roll's width.
11. A method according to claim 10, further comprising the steps of :
Arranging a flatness measuring device to provide a signal indicative of flatness of the metal strip after it passes from the roll:
Receiving data from the flatness measuring device and varying the application of heat to the one or more zones, and/or adjusting the cooling medium flow to the work roll or rolls, responsive to said flatness data
12. A method according to claim 10, wherein the application of heat to the one or more zones and/or adjustment of the cooling medium flow to the work roil or rolls is manually varied by a human operator, responsive to said data.
13. A method according to claim 10, wherein the application of heat to the one or more zones and/or adjustment of the cooling medium flow to the work roll or rolls is manually varied or varied by a processor arranged to receive data from the flatness measuring device.
14. A method according to claim 10, where the flatness measuring device is arranged to measure the profile of the roll.
15. A method according to claim 10, where the flatness measuring device is arranged directly to measure the flatness of the strip.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1208857.1A GB2502156B (en) | 2012-05-19 | 2012-05-19 | Rolling mill temperature control |
GB1208857.1 | 2012-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013175158A1 true WO2013175158A1 (en) | 2013-11-28 |
Family
ID=46546364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2013/000223 WO2013175158A1 (en) | 2012-05-19 | 2013-05-17 | Rolling mill temperature control |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2502156B (en) |
WO (1) | WO2013175158A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109078990A (en) * | 2018-09-12 | 2018-12-25 | 杭州电子科技大学 | Hot rolled strip temperature and plate are just as step on-line measuring device |
CN114769313A (en) * | 2022-04-24 | 2022-07-22 | 中色科技股份有限公司 | Electromagnetic induction heating system for edge of working roll of aluminum plate and strip foil rolling mill and control method |
EP4032628A1 (en) * | 2021-01-25 | 2022-07-27 | Speira GmbH | Uses of cold rolling devices and method for controlled cold rolling of aluminium foil |
Families Citing this family (2)
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CN104384204B (en) * | 2014-10-21 | 2016-05-11 | 北京科技大学 | A kind of hot rolled aluminium convex degree control method based on dynamic segmentation cooling technology |
FR3124747B1 (en) * | 2021-07-02 | 2023-06-30 | Constellium Issoire | PROCESS FOR PREHEATING A ROLLING WORK ROLL |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE472054C (en) * | 1927-05-02 | 1929-02-25 | Sundwiger Eisenhuette Maschb A | Process for hot rolling metals |
US20070193322A1 (en) * | 2006-02-17 | 2007-08-23 | Beck William J | Application of induction heating to control sheet flatness in cold rolling mills |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3564140D1 (en) * | 1984-03-24 | 1988-09-08 | Klaus Reinhold | Roll for processing a flat web-like material |
JP2942692B2 (en) * | 1993-09-30 | 1999-08-30 | 新日本製鐵株式会社 | Continuous heat treatment equipment with variable crown roll |
DE19654068A1 (en) * | 1996-12-23 | 1998-06-25 | Schloemann Siemag Ag | Method and device for rolling a rolled strip |
-
2012
- 2012-05-19 GB GB1208857.1A patent/GB2502156B/en active Active
-
2013
- 2013-05-17 WO PCT/GB2013/000223 patent/WO2013175158A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE472054C (en) * | 1927-05-02 | 1929-02-25 | Sundwiger Eisenhuette Maschb A | Process for hot rolling metals |
US20070193322A1 (en) * | 2006-02-17 | 2007-08-23 | Beck William J | Application of induction heating to control sheet flatness in cold rolling mills |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109078990A (en) * | 2018-09-12 | 2018-12-25 | 杭州电子科技大学 | Hot rolled strip temperature and plate are just as step on-line measuring device |
EP4032628A1 (en) * | 2021-01-25 | 2022-07-27 | Speira GmbH | Uses of cold rolling devices and method for controlled cold rolling of aluminium foil |
WO2022157312A1 (en) * | 2021-01-25 | 2022-07-28 | Speira Gmbh | Uses of cold-rolling devices and method for the controlled cold rolling of aluminium foil |
CN114769313A (en) * | 2022-04-24 | 2022-07-22 | 中色科技股份有限公司 | Electromagnetic induction heating system for edge of working roll of aluminum plate and strip foil rolling mill and control method |
CN114769313B (en) * | 2022-04-24 | 2024-04-05 | 中色科技股份有限公司 | Electromagnetic induction heating system for edge part of working roll of aluminum plate strip foil rolling mill and control method |
Also Published As
Publication number | Publication date |
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GB2502156A (en) | 2013-11-20 |
GB201208857D0 (en) | 2012-07-04 |
GB2502156B (en) | 2014-08-20 |
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