EP3515615A1 - Roll treatment during operation - Google Patents
Roll treatment during operationInfo
- Publication number
- EP3515615A1 EP3515615A1 EP17772022.4A EP17772022A EP3515615A1 EP 3515615 A1 EP3515615 A1 EP 3515615A1 EP 17772022 A EP17772022 A EP 17772022A EP 3515615 A1 EP3515615 A1 EP 3515615A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- processing unit
- laser processing
- roll
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000011282 treatment Methods 0.000 title abstract 4
- 238000005096 rolling process Methods 0.000 claims abstract description 43
- 239000002184 metal Substances 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims description 164
- 238000003754 machining Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000013532 laser treatment Methods 0.000 abstract 3
- 230000008901 benefit Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005555 metalworking Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
- B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
Definitions
- the invention relates to a rolling stand for rolling a rolled product, preferably a metal strip, which has at least one roller and a processing device for processing the surface of the roller.
- the invention further relates to a method for processing the surface of a roll in a roll stand.
- a rolling stand has at least two parallel aligned work rolls forming a nip through which the strip passes to reduce the thickness.
- the mill stand next to the work rolls on support and / or intermediate rollers, which cooperate with the work rolls for various reasons, such as the stabilization of the work rolls, power transmission, etc., with the work rolls.
- WO 2008/129141 A1 describes a method and a device for cleaning a roller.
- JP 59-179207 A proposes to carry out processing of the work rolls while they are in the rolling stand.
- An object of the invention is to overcome at least one of the above-mentioned disadvantages, for example to improve the wear behavior of a roll in a roll stand, to reduce the maintenance effort and / or to improve the quality of a rolled product.
- the rolling mill according to the invention is used for rolling a rolled product, preferably in the metalworking industry.
- the rolled product may be a strip-shaped metal product, here called metal strip.
- the rolling stand can be designed for hot or cold rolling.
- the rolling stand has at least one roller, but usually at least two work rolls forming a nip.
- the roll stand further comprises at least one further roll, which is in contact with a work roll.
- the rolling stand further comprises a processing device for processing the surface of one or more of the rolls.
- processing particularly includes the cleaning, texturing and / or contouring of the relevant roller.
- the processing device may be arranged to remove material from the roll, such as to even out the surface thereof, straighten the contour thereof, and / or refresh or incorporate a texture.
- the processing device has at least one laser processing unit which is set up to machine the surface of the roller (s) by means of a laser beam.
- the processing device has a setting device, which is set up to adjust the position and / or position of the laser processing unit relative to the surface of the roller (s).
- the adjustability of the laser processing unit or more generally of the processing units defined below, can be realized in various ways.
- a translational movement for example by means of a rail on which a rotor is slidably mounted, a spindle, etc. can be realized.
- the actuation can be carried out by an electric motor, hydraulically or in another way, as far as precise adjustability is ensured.
- the processing device further has at least one positioning aid which, like the laser processing unit, falls under the more general designation processing unit, wherein the positioning aid is adjustable by the setting device together with the laser processing unit.
- the positioning aid is adjustable by the setting device together with the laser processing unit.
- one or more of the processing units are attached for this purpose to the adjusting device or a part of the adjusting device.
- the positioning aid is a device which serves to precisely adjust or assist the position and / or position of the laser processing unit relative to the roller surface.
- the positioning aid may comprise a distance sensor or an adjustment unit, both of which are described in detail below.
- the laser processing unit By the laser processing unit, a residue-free or at least low-residue machining of the roll surface is possible by impurities and / or roll material are evaporated by means of the laser beam.
- the positioning aid which can be adjusted by the setting device together with the laser processing unit, the laser processing in the rolling stand can be carried out with high precision. This must The processing is not necessarily performed in a rolling break, but it can even be done during the regular rolling operation. As a result, a portion of the time that was usually necessary for the maintenance and / or replacement of the roller can be saved. Furthermore, wear marks, in particular caking on support rollers, can be reliably and quickly removed, whereby a high rolling quality can be ensured with high productivity.
- the integrated in the rolling mill laser machining leads to a possible roller workshop with the usual grinding machines and the like can be made smaller.
- the positioning aid comprises a distance sensor arranged to determine a measure of a distance between the laser processing unit and the surface of the roller.
- the determination, preferably detection, of the distance of the laser processing unit, in particular of a laser head of the laser processing unit, from the roll surface improves the precision of the setting, which is particularly important in laser processing in the rolling stand.
- the positioning aid preferably has an adjustment unit which is set up to perform a fine positioning of the laser processing unit relative to the roller surface and / or to ensure or maintain a defined, preferably constant, distance of the laser processing unit relative to the roller surface during the laser processing of the roller.
- the adjusting unit may perform a fine positioning based on an electronic control, but the adjusting unit may also take advantage of a physical principle, with which a defined distance between the laser processing unit, in particular the laser head, and the roller surface is adjustable.
- the adjusting unit preferably has a nozzle, fluidly connected to a gas source, which are adapted to output a gas flow, preferably air flow, in the direction of the roll to be processed.
- a gas flow preferably air flow
- this preferred realization uses an adjusting unit of the nozzle of the Bernoulli principle.
- the nozzle has a tube that outputs the gas flow and in which the laser processing unit is arranged completely or partially.
- the tube surrounds the laser processing unit or the laser beam output from the laser processing unit, preferably in a concentric manner.
- the use of the Bernoulli principle also has other advantages.
- the gas flowing out against the rotation of the roller locally dries the roller surface, so that the area of the roller to be processed is dry.
- the gas flow carries off particles removed by the laser machining, which particles can subsequently be discharged from the area of the rolling mill by any vapor extraction.
- the distance of the laser processing unit to the roll surface can be adjusted by changing the volume flow and / or pressure.
- the processing apparatus can be used without restriction for reversing stands.
- the roller to be processed by the processing device is a support roller, since the support rollers usually cause particularly long changeover times and are particularly suitable due to the local caking for the laser processing described here in the roll stand.
- the processing device is arranged to machine the surface of the roll during rolling of the rolled product, whereby the time saving described above is particularly achievable.
- the laser processing unit preferably has a picosecond or femtosecond laser in order to support a high-precision and low-residue processing.
- the method according to the invention serves to machine the surface of a roll in a roll stand, the method being carried out with a roll stand as described above.
- the method comprises: adjusting the position and / or position of the laser processing unit and the positioning aid relative to the roller surface by means of the adjusting device; and actuating, i. Turning, the laser processing unit, so that the roller surface is processed by means of a laser beam output from the laser processing unit.
- the laser processing unit which is guided in the adjusting unit, is positioned in the vicinity of the roller surface before processing by means of the adjusting device and / or positioning aid. Subsequently, the nozzle is caused to emit a gas flow in the direction of the roller, whereby the nozzle and thus the laser processing unit are sucked to a constant distance to the roll surface. In this way, the fine positioning and at the same time the atmosphere for the laser processing are ensured. If the laser processing takes place outside the regular rolling, the roller should be rotated to avoid damage to the roller.
- the laser processing unit is moved by means of the adjusting device along the roll bale, ie parallel to the axial direction of the roll, to perform the processing of the desired areas of the roll surface.
- the adjusting unit for example, taking advantage of the Bernoulli principle, ensures that the distance to the roll surface is kept constant during machining or has the desired value for machining.
- the gas flow is preferably switched off only when the laser processing unit has been withdrawn from the vicinity of the roll surface to avoid damage to the surface of the roll or the exit of the nozzle.
- FIG. 1 shows a roller arrangement with two work rolls and two back-up rolls, with reference to which the transfer of wear-related rolling marks is explained.
- FIG. 2 shows schematically a processing device, attached to a back-up roll, for processing the surface of the back-up roll.
- FIG. 3 and FIG. 3 a schematically show a processing apparatus with a laser processing unit, a positioning aid and a distance sensor, placed on a support roller, for processing the surface of the support roller.
- FIG. 4 schematically shows an embodiment of an adjustment unit which shows the Bernoulli principle for fine positioning of a laser processing unit relative to a roller surface.
- FIG. 1 shows an arrangement of rolls, as occurs in a conventional roll stand.
- the rolling stand which rotatably supports the rollers, and drives and the like are not shown for clarity.
- the assembly comprises two work rolls 1 and 2 forming a nip, and two back-up rolls 3 and 4.
- a product 5 to be rolled, such as a Metal strip passes through the nip, whereby a reduction in thickness and / or a texturing of the rolled product 5 take place.
- the support rollers 3, 4 are each in contact with a work roll 1, 2 in order to stabilize them, in particular to prevent bending of the work rolls 1, 2 due to the force to be applied to the rolled product.
- the work rolls 1, 2 are subjected to greater stress than in the central region, viewed in the axial direction, of the rolled product 5. This results in that the work rolls 1, 2 tend to wear unevenly in the axial direction.
- the material removal in the region of the band edges 5a and 5b is greater than in the middle region.
- the wear marks in the region of the band edges 5a, 5b are referred to as roller markings. These not only lead to an immediate impairment of the rolling quality of the rolled product 5, but there is also a transfer of the roller marks on the support rollers 3, 4, which there as so-called "caking", i. outward curvature, show. Due to axial displacement of the rollers 1, 2, 3, 4 and a variance of the bandwidth, the wear range extends over a significant portion of the roll bale.
- FIG. 2 schematically shows a processing apparatus 10, exemplified by a support roller 3, for processing the surface of the support roller 3.
- processing particularly includes cleaning and / or contouring and / or texturing of the roller surface.
- the processing device 10 is designed such that it is permanently installed, in particular during the regular rolling process, in the region of the rolling stand or directly on the rolling stand.
- the processing device 10 has for this purpose a frame 1 1, which may be the rolling mill or a part thereof. Furthermore, the processing device 10 has a positioning device 20, which serves to move one or more of the components described below for processing, measurement and / or adjustment. Such components which can be positioned by the setting device 20 and which serve or contribute to the precision machining of the associated roller are referred to as machining units. Although a back-up roll 3 is used as an example for processing, the processing device 10 with its setting device 20 and the other components can also be associated with another roll, such as a work roll 1, 2 or an intermediate roll, not shown. Furthermore, the processing device 10 can also be designed for processing a plurality of, in particular adjacent rolls.
- the processing device 10 has one or more laser processing units 30, which has at least one laser for mechanical processing of the roll surface.
- the high precision laser is preferably a pico or femtosecond laser. It serves for the residue-free or residue-poor evaporation of impurities on the respective roll and / or for processing the roll material.
- the processing device 10 can have further processing units, such as a positioning aid 31 for precisely setting the laser processing unit 30 to the surface of the roller 3 to be processed and / or a sensor 40 for measuring the distance of the laser processing unit 30 to the surface of the roll to be processed and / or an adjusting unit 50 (see Figure 4), which is described below.
- a positioning aid 31 for precisely setting the laser processing unit 30 to the surface of the roller 3 to be processed
- a sensor 40 for measuring the distance of the laser processing unit 30 to the surface of the roll to be processed
- an adjusting unit 50 see Figure 4
- the laser processing units (s) 30 and optionally further processing units are connected to the adjusting device 20 or attached thereto, that their positions and / or positions relative to the associated roller by the adjusting device 20 are variable.
- the laser processing unit 30 can be moved in parallel and perpendicular to the axial direction of the support roller 3, as shown in Figures 2 and 3 by arrows.
- further degrees of freedom can be realized, such as a pivoting of the laser processing unit 30 about an axis of the adjusting device 20.
- the adjustability of the processing units can be realized in various ways.
- a translational movement for example by means of a rail on which a rotor is slidably mounted, a spindle, etc. can be realized.
- the actuation can take place electromotively, hydraulically or in another way, as far as a precise adjustment is possible.
- the processing device 10 according to FIG. 3 has the above-mentioned distance sensor 40, which is a processing unit.
- the distance sensor 40 is arranged directly on the laser processing unit 30, adjustable via the adjusting device 20 and / or the positioning aid 31 together with the laser processing unit 30 and measures or determines a measure of the distance between the laser head of the laser processing unit 30 and the roller surface of the support roller 3 the laser processing unit 30, the adjusting device 20 and the distance sensor 40 with a control device, not shown, such as a computer or control electronics, communicate and be controlled by, a high-precision machining of the surface of the support roller 3, 4 can be realized.
- a control device not shown, such as a computer or control electronics
- the processing device 10 may have an adjustment unit 50.
- An exemplary realization thereof is shown in FIG.
- the distance sensor 40 and the adjustment unit 50 support the positioning and / or position change, in particular fine positioning (set out below), the laser processing unit 30 relative to the roller surface and are insofar examples of a positioning aid.
- the positioning of the laser processing unit 30 it is technically common to them that their positions and / or positions relative to the roller surface of the setting device 20 together with the laser processing unit 30 are adjustable.
- an adjusting unit 50 is understood to mean a device which permits a fine positioning of the nozzle 51 and / or ensures a constant distance during the processing of the roller.
- the adjusting unit 50 can perform a fine adjustment on the basis of an electronic control, but the adjusting unit 50 can also make use of a physical principle, whereby a defined, preferably constant, distance between the laser head of the laser processing unit 30 and the roller surface is adjustable.
- the exemplary realization of the adjustment unit 50 according to FIG. 4 uses the Bernoulli principle.
- the adjusting unit 50 has for this purpose a nozzle 51 which, supplied by a gas source, not shown, a gas, preferably air, in the direction of the roller to be processed, here support roller 3, outputs.
- the gas stream is shown schematically in FIG.
- the nozzle 51 sucks due to the Bernoulli principle in the immediate vicinity of the roll surface.
- the distance between the self-sucking nozzle 51 adjusts itself via the volume flow and / or pressure of the gas.
- the laser processing unit 30, which is in a movable positional relationship with the nozzle 51, can thus be kept constant in a technically elegant manner, independently of the roll surface, while the laser head is being moved along the roll surface during processing.
- the laser processing unit 30 is completely or partially placed in a tube through which the gas flows at a defined volumetric flow and pressure and in this way realizes the nozzle 51.
- the gas which preferably flows counter to the rotation of the roller, dries the roller surface locally, so that the area of the roller to be processed is dry.
- the gas flow carries off particles removed by the laser machining, which particles can subsequently be discharged from the area of the rolling mill by any vapor extraction.
- the distance of the laser processing unit 30 to the roll surface can be adjusted by changing the volume flow and / or pressure.
- the processing units are preferably adjustable in a sliding or continuous manner by the adjusting device 20 and / or positioning aid 31.
- the process of roll processing preferably comprises a step in which the setting device 20 moves to a fixed position in relation to the roll surface. By the gas flow and the Bernoulli principle, the nozzle 51 is sucked. This creates a relative movement between the laser processing unit 30 and the nozzle 51.
- one or more travel limits are provided, which serve for example for pre-positioning and / or predetermine specific adjustment positions, in particular a maximum adjustment position.
- the adjusting device 20 itself is displaceable via a displacement mechanism, not shown, preferably along the roll surface.
- the above-described upper and lower roller processing apparatus 10 is applicable to a rolling stand.
- the use of the processing device 10 is provided on support rollers 3, 4. But it can also be used on work rolls 1, 2 or intermediate rolls, not shown, or support rollers. Since the machining can be carried out with little residue or even without residue due to the use of a suitable laser, the machining process does not have to be carried out in a rolling break, but can even take place during the regular rolling operation.
- a suitable process flow may be as follows: First, the processing units are moved by the adjusting device 20 in the vicinity of Pre-positioned roll bale of the roller to be processed.
- the gas flow is turned on, whereby the gas flows from the nozzle 51 to the roller and the fine positioning takes place to the laser processing unit 30.
- the roll should be rotated.
- laser processing should not be performed on the stationary roller.
- the laser processing is performed by operating the laser processing unit 30.
- the laser processing unit 30 is displaced by means of the adjusting device 20 along the roll bale to perform the processing, ie cleaning, texturing, contouring, etc., of the desired areas of the roll surface.
- the gas flow should be turned off only when the laser processing unit 30 has been withdrawn from the vicinity of the roll surface to prevent damage to the surface of the roll or the exit of the die 51.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016217870 | 2016-09-19 | ||
PCT/EP2017/073643 WO2018050920A1 (en) | 2016-09-19 | 2017-09-19 | Roll treatment during operation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3515615A1 true EP3515615A1 (en) | 2019-07-31 |
EP3515615B1 EP3515615B1 (en) | 2020-01-22 |
Family
ID=59955554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17772022.4A Active EP3515615B1 (en) | 2016-09-19 | 2017-09-19 | Roll treatment during operation |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3515615B1 (en) |
WO (1) | WO2018050920A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59179207A (en) | 1983-03-31 | 1984-10-11 | Sumitomo Metal Ind Ltd | Method for processing rolling roll |
JPH06170564A (en) * | 1992-12-02 | 1994-06-21 | Nippon Steel Corp | In-line laser dull-working device |
JPH07223004A (en) * | 1994-02-17 | 1995-08-22 | Nippon Steel Corp | In-line machining method for cold rolling roll |
DE4437829A1 (en) * | 1994-10-14 | 1996-04-18 | Mannesmann Ag | Method and device for adjusting the cleaning rollers for cleaning rollers |
NO961668D0 (en) * | 1996-04-25 | 1996-04-25 | Gisela Berg | Procedure for maintenance of rollers / roll shells |
FR2915118B1 (en) | 2007-04-18 | 2009-06-05 | Siemens Vai Metals Tech Sas | METHOD FOR CLEANING ROLLER CYLINDER AND DEVICE THEREFOR |
DE102012211454A1 (en) * | 2012-07-02 | 2014-01-02 | Sms Siemag Ag | Method and device for cooling surfaces in casting plants, rolling mills or other strip processing lines |
-
2017
- 2017-09-19 EP EP17772022.4A patent/EP3515615B1/en active Active
- 2017-09-19 WO PCT/EP2017/073643 patent/WO2018050920A1/en active Search and Examination
Also Published As
Publication number | Publication date |
---|---|
WO2018050920A1 (en) | 2018-03-22 |
EP3515615B1 (en) | 2020-01-22 |
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