EP3307448A1 - Method and device for controlling a parameter of a rolled stock - Google Patents
Method and device for controlling a parameter of a rolled stockInfo
- Publication number
- EP3307448A1 EP3307448A1 EP16727716.9A EP16727716A EP3307448A1 EP 3307448 A1 EP3307448 A1 EP 3307448A1 EP 16727716 A EP16727716 A EP 16727716A EP 3307448 A1 EP3307448 A1 EP 3307448A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling shell
- parameter
- cooling
- roll
- roller
- 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
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 133
- 238000005096 rolling process Methods 0.000 claims abstract description 45
- 230000009471 action Effects 0.000 claims description 37
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000002826 coolant Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 7
- 230000001419 dependent effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- B21B37/30—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
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- 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
- B21B37/34—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by hydraulic expansion of 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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
Definitions
- the invention relates to a method and an apparatus for controlling a parameter, for example the profile or the flatness of a strip-shaped rolling stock, in particular a metal strip, rolled by means of a roll stand.
- a parameter for example the profile or the flatness of a strip-shaped rolling stock, in particular a metal strip, rolled by means of a roll stand.
- a parameter for example the profile or the flatness of a strip-shaped rolling stock, in particular a metal strip, rolled by means of a roll stand.
- a parameter for example the profile or the flatness of a strip-shaped rolling stock, in particular a metal strip, rolled by means of a roll stand.
- FIG. 13 shows a known cascade control for regulating, for example, the profile or flatness of a metal strip via the setting of the thermal roll bale contour. For the sake of simplicity, only parameters will be discussed below instead of distinguishing between profile and flatness.
- the actual value ie the actual parameter of the rolling stock at the output of the controlled system, ie in particular at the outlet of a rolling stand after rolling, is first measured according to FIG.
- the actual parameter Pist of the rolling stock is fed to a parameter comparison device 120 and compared there with a predetermined desired parameter P SO II.
- the difference between the setpoint and the actual value is referred to as parameter control deviation eP.
- This parameter deviation eP is used by a desired current determination device 130 for determining a desired value
- the desired current determination device 130 typically also takes into account other predetermined ones Requirements for the rolls from the rolling process to determine the target value Qabsou 0C ' he of an equivalent value. In a heat flow comparator 140, this previously determined target value Q abSoU for the
- Heat is determined directly or indirectly using a corresponding actual current measuring device 170.
- the rolling stand with the rollers 300 for rolling the rolling stock 200 represents the controlled system 180 in FIG. 13.
- FIG. 13 shows a controller 150, which is designed to generate an actuating signal s in FIG.
- the control signal is used to control an actuator 160 so that the heat flow control deviation is as possible zero.
- the volumetric flow or the pressure of the cooling medium for roll cooling in the roll stand is used as manipulated variable, wherein in particular the volume flow or the pressure of the cooling medium is adjusted by means of suitable actuators 165 as a function of the actuating signal s.
- suitable actuators 165 are used in the art.
- coupled with a control cooling is usually a spray cooling.
- Their disadvantage lies in the low heat transfer between the roller and the coolant. For optimal cooling results, a large amount of coolant must be circulated.
- cooling shells are circular in cross section Trays whose curvature is adapted to the curvature or the diameter of the roll to be cooled.
- cooling shells for roll cooling is known, for example, from German patent applications DE 10 2012 216 570 A1, DE 10 2012 202 340, DE 10 2009 053 073 or European patent application EP 2 114 584 A1.
- the change in the gap height h between the cooling shell and roller (technologically changes the pressure or the flow rate of the coolant in the gap), the direct change of pressure or volume flow of the Coolant and the change in the coolant temperature.
- the change in the gap height h is structurally very complex. The exact measurement of the gap height for an active integration into a control is difficult to realize and has therefore not been implemented in practice.
- the change in the coolant temperature is as an actuator of a control technically conceivable but too slow, this is very costly.
- the invention is based on the object, an alternative method and an alternative device for controlling a parameter of a rolled strip with the aid of a rolling mill.
- This object is procedurally achieved by the method claimed in claim 1.
- the actuating signal is a cooling shell assigned to a roll of the roll stand, wherein the cooling shell is variable in its length of action in the circumferential direction of the roll, and in that the action length of the cooling shell in the circumferential direction of the roll is adjusted with the aid of the control signal
- Dependence of the parameter control deviation is suitably set. Suitable here means that the parameter control deviation becomes zero as far as possible.
- the heat flow can not be measured directly. Therefore, as far as is spoken in the text or the figures of a measurement of the heat flow or a measuring device for the heat flow, thus a computational determination of the heat flow meant by evaluation of measured temperature differences, here between the inlet and the outlet of the coolant.
- the claimed variation of the length of action of the cooling shell in the circumferential direction of the roll provides a simple, fast and cost-effective, because more energy-efficient way to vary the amount of heat to be dissipated by the roll.
- the cooling shell typically has a cross section in the form of a portion of a circular arc for covering a surface area of the roll.
- the determination of the actuating signal has the following sub-steps: determination of a desired value for the current of the heat to be dissipated by the roller from the previously determined parameter deviation and optionally taking into account further requirements from the rolling process to the cooling of the roller; Determining the actual current of the heat actually removed from the roll; Determining a heat flow control deviation as the difference between the target value and the actual value for the Current of heat to be dissipated by the roller; and determining the control signal for adjusting the length of action of the cooling shell in the circumferential direction in accordance with the heat flow control deviation, which in turn is dependent on the parameter control deviation.
- the aim of the cascade control according to the invention is that in addition to the parameter deviation and the heat flow control deviation is zero.
- the length of action of the cooling shell in the circumferential direction is increased when the desired value of the dissipated heat flow is greater than the actual value, and vice versa.
- the length of action of the cooling shell in the circumferential direction can remain unchanged if the desired value of the heat flow is equal to the actual value.
- the invention essentially proposes three different embodiments:
- the cooling shell is divided into at least a first and a second cooling shell segment, each having a cross section in the form of a portion of a circular arc for covering a surface region of the roll.
- the first and the second cooling shell segments are displaced relative to one another in the circumferential direction in accordance with the actuating signal. In particular, this results in an at least partial overlapping of the first and second cooling shell segments.
- a second embodiment provides that the cooling shell is formed of flexible material which allows adjusting the length of action of the cooling shell in the circumferential direction of the roll by bending at least parts of the cooling shell away from the roll or towards the roll or by winding or unwinding the roll flexible material in accordance with the control signal.
- the cooling shell on at least one rotatable flap, which allows adjusting the length of action of the cooling shell in the circumferential direction in that the flap is opened or closed in accordance with the control signal.
- the parameters considered in the context of the present invention are typically physical quantities, which are considered in the width direction of the rolling stock.
- the parameter may be the profile of the rolling stock in the width direction or the distribution of the flatness of the rolling stock in the width direction.
- the process can be carried out during the ongoing operation of a rolling stand, preferably / but also in rolling breaks. In both cases, the method advantageously makes it possible to remove a defined heat flow from the roll.
- the present invention further provides that a plurality of cooling shells in the axial direction of the roller are arranged side by side and these individual cooling shells individually in their Impact length in the circumferential direction of the roller are adjustable.
- FIG. 1 shows a control scheme according to the present invention for controlling a parameter of a rolling stock
- Figure 2 shows a first embodiment of the cooling shell according to the invention with adjusted short length of action and with the first variant for the actuator;
- FIG. 3 shows the first embodiment of the cooling shell according to FIG. 2 with a set large effective length
- FIG. 4 shows the first embodiment for the cooling shell according to the invention with a set short action length and with a second variant for the actuator;
- Figure 5 shows the first embodiment of Figure 4 with set large
- Figure 6 shows a second embodiment of the cooling shell according to the invention with set short length of action
- Figure 7 shows the second embodiment of Figure 6 with set large
- Figure 8 shows a third embodiment of the cooling shell according to the invention with a first adjustment variant
- FIG. 10 shows the third embodiment for the cooling shell in a third setting variant; the third embodiment of the cooling shell with a fifth setting variant; a plan view of a roller having a plurality of juxtaposed in the axial direction of the roll individual cooling shells; and
- Figure 13 shows a control scheme for controlling a parameter of a rolling stock according to the prior art.
- FIG. 1 shows a cascade control for regulating a parameter of a metal strip, for example for regulating its profile or its flatness.
- a parameter of a metal strip for example for regulating its profile or its flatness.
- the cascade control according to the invention according to FIG. 1 provides a special actuator 160.
- the actuator 160 is a cooling shell, which is circular in cross section.
- the cooling shell is spaced, placed against the surface of a roll to be cooled in a rolling mill, so that to set a cooling gap for fürzu meetingsdes coolant between the cooling shell and the roll surface.
- the cooling shell is formed in its cross section preferably complementary to the outer contour or to the cross section of the roller.
- the cooling shell according to the invention is designed and adjustable in the circumferential direction of the roll with the aid of an actuator 165 in its action length.
- the action length of the cooling shell 160 in the circumferential direction of the roll is suitably set as a function of the heat flow control deviation eQ.
- Suitable in this context means that the heat flow control deviation eQ is as zero as possible.
- the heat flow control deviation eQ in turn is dependent on the parameter control deviation eP, as described in the introduction with reference to FIG.
- the regulation according to the invention should, in addition to the heat flow control deviation and the parameter control deviation as possible to zero.
- the action length of the cooling shell 160 in the circumferential direction of the roll is increased if the desired value g absoii of the heat flow to be delivered by the roll is greater than the measured actual value Q abist of the heat flow, and vice versa.
- the circumferential direction can remain unchanged if the desired value g absoii of the heat flow to be delivered by the roller is equal to the actual value Q abist of the heat flow delivered.
- FIG. 2 shows a first embodiment of the cooling shell according to the invention.
- the cooling shell 160 at least a first and a second cooling shell segment 161 and 162, each having a cross-section in shape a portion of a circular arc for covering a surface area of the roller.
- the actuator 165 which is designed as a hydraulic cylinder in the first variant shown in Figure 2
- the two cooling shell segments 161, 162 in the circumferential direction of the roller 300 in accordance with the control signal s are shifted relative to each other, in this way the entire length of action b the cooling shell 160 suitably set in accordance with the control signal s.
- the action length b in the present description is always represented by the angle or the corresponding arc length given in FIG. 2 and the following figures.
- the reference numeral A denotes the axis of rotation of the roller 300 and the reference numeral D whose direction of rotation during rolling of the rolling stock 200, which moves in the rolling direction WR.
- the two cooling-plate segments 161, 162 are each arranged at a distance from the outer surface of the roller 300, so that a cooling gap is formed between the cooling-plate segments and the surface of the roller 300.
- the cooling gap 180 is fed with cooling medium 400, which flows through the cooling gap in the direction of the arrow or in the opposite direction.
- the cooling effect is essentially determined by the length of action b of the cooling shell 160 or of the cooling shell segments 161, 162.
- the greater the effect length b the greater the cooling capacity, ie. H. the more heat can be removed from the roller 300.
- FIG. 2 shows the first exemplary embodiment of the cooling shell 160 with a relatively short effective length b, because the two cooling shell segments 161, 162 substantially or strongly overlap in the position shown in FIG.
- FIG. 3 shows the first exemplary embodiment with the first variant for the actuator 165 in a working position in which the two cooling shell segments 161 and 162 overlap less strongly with respect to the working position shown in FIG. 2 and in which therefore the effect length b is increased.
- FIG. 4 shows the first exemplary embodiment of the cooling shell with a second variant for the actuator 165. Unlike the first variant, the actuator or the displacement device 165 according to FIG. 4 is constructed in a more complicated manner.
- the displacement device comprises a rotatably mounted wheel 165-1 and an associated drive device 165-2 for rotationally driving the wheel.
- the wheel 165-1 in turn is coupled to the second cooling shell segment 162, for example by coupling element 165-3, by frictional engagement or positive engagement such that a rotational movement of the wheel 165-1 the displacement of the second cooling shell segment 162 in the circumferential direction of the roller 300 and relative to the first cooling shell segment 161 causes.
- FIG. 4 shows the cooling shell 160 with the two cooling shell segments 161, 162 in a working position with a relatively short effective length b.
- FIG. 5 shows the first exemplary embodiment of the cooling shell with the second variant of the displacement device 165 in a working position with an enlarged effective length b.
- the first cooling cup segment 161 may be fixedly arranged with respect to the roller 300.
- FIG. 6 shows a second embodiment of the cooling shell 160 according to the invention, wherein it is formed of a flexible material.
- the actuator 165 is formed in this case as a bending device or as winding and unwinding for adjusting the length of action b of the cooling shell 160 in the circumferential direction of the roller 300.
- the actuator 165 is used, for example, to roll-like winding the flexible cooling shell 160, in this way the length of action b of the cooling gap 180 to make relatively small.
- FIG. 7 shows the cooling shell 160 with a large effective length b compared to FIG. 6, which was achieved in that the actuator 165 unwound the flexible material of the cooling shell and thus enlarged the cooling shell.
- FIG. 8 shows a third exemplary embodiment of the cooling shell 160 according to the invention, the latter having at least one but typically a plurality of rotatable flaps 163.
- An actuator 165 is then configured to adjust the length of action of the cooling shell 160 in the circumferential direction of the roll 300 by opening or closing at least one of the flaps 163 in accordance with the control signal s.
- Figures 8 to 11 each show different variants for influencing the length of action b of the cooling shell 160 by individually opening individual flaps 163.
- the flaps form part of the surface of the cooling shell 160 and therefore limit the cooling gap 180 at least in the closed state.
- FIG. 12 shows a top view of the roller 300 with the cooling shell 160 engaged.
- the actuator 165 is designed to suitably individually adjust the length of action of each one of the n cooling shells 160-n in the circumferential direction of the roller 300 in accordance with the control signal s represented by the control signal s
- the heat flow control deviation eQ generally represents - and thus also in the exemplary embodiment shown in FIG. 12 - the distribution of the heat flow to be delivered by the roller 300 in the axial direction of the roller or in the width direction B of the rolling stock 200.
- the widths of the individual sub-cooling shells 160- n in the axial direction can be individually different; they are designated by the reference symbols a, b, c and d in FIG.
- the sectionkühlschalen 160-n can also be a common have one-piece first Kuhlschalensegment 161, so that only the second Kuhlschalensegmente 162-n in their length of action in the circumferential direction of the roller 300 are variably adjustable, as indicated by the vertical double arrows in Figure 12.
- FIG. 12 is not limited to the embodiment of the cooling shells 160 according to the first embodiment. Rather, the basic principle illustrated in FIG. 12 of the individual adjustability of the effective lengths b over the axial widths of the roller with all three exemplary embodiments for the cooling shell 160 described in the present description can be implemented.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015210680.2A DE102015210680A1 (en) | 2015-06-11 | 2015-06-11 | Method and device for controlling a parameter of a rolling stock |
PCT/EP2016/063045 WO2016198457A1 (en) | 2015-06-11 | 2016-06-08 | Method and device for controlling a parameter of a rolled stock |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3307448A1 true EP3307448A1 (en) | 2018-04-18 |
EP3307448B1 EP3307448B1 (en) | 2019-09-25 |
Family
ID=56112977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16727716.9A Active EP3307448B1 (en) | 2015-06-11 | 2016-06-08 | Method and device for controlling a parameter of a rolled stock |
Country Status (8)
Country | Link |
---|---|
US (1) | US10807134B2 (en) |
EP (1) | EP3307448B1 (en) |
JP (1) | JP6527967B2 (en) |
KR (1) | KR102042039B1 (en) |
CN (1) | CN107848000B (en) |
DE (1) | DE102015210680A1 (en) |
RU (1) | RU2690556C1 (en) |
WO (1) | WO2016198457A1 (en) |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR930000465B1 (en) * | 1985-05-17 | 1993-01-21 | 가부시기가이샤 히다찌세이사꾸쇼 | Method and apparatus for cooling rolling mill rolls |
JPS6245409A (en) | 1985-08-26 | 1987-02-27 | Nippon Kokan Kk <Nkk> | Roll cooling mechanism |
US5212975A (en) * | 1991-05-13 | 1993-05-25 | International Rolling Mill Consultants, Inc. | Method and apparatus for cooling rolling mill rolls and flat rolled products |
RU2115494C1 (en) * | 1997-08-14 | 1998-07-20 | Череповецкий государственный университет | Method for control of temperature profile of mill rolls |
DE19850738A1 (en) * | 1998-11-04 | 2000-05-11 | Schloemann Siemag Ag | Operating method for a roll stand of a rolling mill |
JP3300759B2 (en) * | 1999-02-05 | 2002-07-08 | 三菱重工業株式会社 | Induction heating device for roll crown heat crown shape control |
JP2000237805A (en) * | 1999-02-22 | 2000-09-05 | Hitachi Ltd | Method and device for online roll grinding |
US6652273B2 (en) * | 2002-01-14 | 2003-11-25 | The Procter & Gamble Company | Apparatus and method for controlling the temperature of manufacturing equipment |
JP2005334910A (en) * | 2004-05-25 | 2005-12-08 | Toshiba Mitsubishi-Electric Industrial System Corp | Coolant controller, plate profile controller and flatness controller for rolling mill |
DE102005042020A1 (en) * | 2005-09-02 | 2007-03-08 | Sms Demag Ag | Method for lubricating and cooling rolls and metal strip during rolling, in particular during cold rolling, of metal strips |
BE1017462A3 (en) | 2007-02-09 | 2008-10-07 | Ct Rech Metallurgiques Asbl | DEVICE AND METHOD FOR COOLING ROLLING CYLINDERS IN HIGHLY TURBULENT. |
DE102009053073A1 (en) | 2009-03-03 | 2010-09-09 | Sms Siemag Aktiengesellschaft | Method and cooling device for cooling the rolls of a roll stand |
CN201442012U (en) * | 2009-07-22 | 2010-04-28 | 山东石横特钢集团有限公司 | Five-slit roller cooling device |
DE102012202340A1 (en) | 2011-12-23 | 2013-06-27 | Sms Siemag Ag | Method and device for cooling rolls |
DE102012216570A1 (en) | 2012-05-11 | 2013-11-14 | Sms Siemag Ag | Device for cooling rolls |
CN203196994U (en) * | 2013-04-25 | 2013-09-18 | 浙江瑞浦机械有限公司 | Roll caliber auxiliary cooling device of continuous mill |
-
2015
- 2015-06-11 DE DE102015210680.2A patent/DE102015210680A1/en not_active Withdrawn
-
2016
- 2016-06-08 JP JP2017564076A patent/JP6527967B2/en active Active
- 2016-06-08 CN CN201680045162.4A patent/CN107848000B/en active Active
- 2016-06-08 EP EP16727716.9A patent/EP3307448B1/en active Active
- 2016-06-08 RU RU2017142342A patent/RU2690556C1/en active
- 2016-06-08 US US15/735,266 patent/US10807134B2/en active Active
- 2016-06-08 KR KR1020177037720A patent/KR102042039B1/en active IP Right Grant
- 2016-06-08 WO PCT/EP2016/063045 patent/WO2016198457A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3307448B1 (en) | 2019-09-25 |
US10807134B2 (en) | 2020-10-20 |
JP6527967B2 (en) | 2019-06-12 |
JP2018520878A (en) | 2018-08-02 |
US20180169724A1 (en) | 2018-06-21 |
CN107848000B (en) | 2019-06-18 |
WO2016198457A1 (en) | 2016-12-15 |
RU2690556C1 (en) | 2019-06-04 |
KR20180044853A (en) | 2018-05-03 |
CN107848000A (en) | 2018-03-27 |
DE102015210680A1 (en) | 2016-12-15 |
KR102042039B1 (en) | 2019-12-02 |
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