EP3568243A1 - Method for tension control - Google Patents
Method for tension controlInfo
- Publication number
- EP3568243A1 EP3568243A1 EP18700485.8A EP18700485A EP3568243A1 EP 3568243 A1 EP3568243 A1 EP 3568243A1 EP 18700485 A EP18700485 A EP 18700485A EP 3568243 A1 EP3568243 A1 EP 3568243A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- rotary drive
- speed
- shaped material
- signal
- 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 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims description 36
- 108010014172 Factor V Proteins 0.000 claims description 13
- 230000001133 acceleration Effects 0.000 claims description 13
- 230000003321 amplification Effects 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 230000006870 function Effects 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 45
- 230000001419 dependent effect Effects 0.000 description 6
- 230000001960 triggered effect Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 102220047090 rs6152 Human genes 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- CGFFKDRVHZIQHL-UHFFFAOYSA-N 1-but-3-en-2-yl-3-(methylcarbamothioylamino)thiourea Chemical compound CNC(=S)NNC(=S)NC(C)C=C CGFFKDRVHZIQHL-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012549 training 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
- B21B37/48—Tension control; Compression control
- B21B37/52—Tension control; Compression control by drive motor control
-
- 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
- B21B37/46—Roll speed or drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
- B21B2265/06—Interstand tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/06—Product speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/08—Coiler speed
Definitions
- the invention relates to a method for tension control in strip-shaped material, in particular in a metal strip, between two clamping points, wherein at least one of the clamping points has a rotary drive for influencing the tensile stress of the material.
- the clamping points may be, for example, two adjacent rolling stands
- a decisive criterion for a rolling mill is the rolling stability.
- the rolling stability depends largely on the stability of the train of metal strip to be rolled.
- Tension controller so controller, which regulate the control variable train, are basically known in the art, for. Example from EP 2 454 033 B1 or DE 10 2006 048 421 A1.
- the hydraulic employment serve in a rolling stand for employment of the work rolls.
- the work rolls are position-controlled, since the position control acts faster on the train as a control of the train by adjusting the speed of the rotary drives of the rollers.
- a force control is often driven at the last stands of a tandem mill to bring a certain surface roughness on the rolled metal strip.
- Alternatively to the said hydraulic adjustment of the rollers can, for. B. when using a force control and the rotary drive of the rolls of a roll stand with variable adjustment of the speed serve as an actuator for the tension control.
- a pass schedule is generated on a regular basis, which estimates or predicts the thickness decreases and the associated speed changes for each individual stand of a rolling train. If, later during the real rolling process, it turns out that the pass schedule does not agree with reality, mass flow disturbances occur, especially during acceleration and deceleration phases which the traction controller must correct.
- New material is rolled or material is rolled with wrong rolling data.
- Acceleration trips causes train disturbances that are caused solely by the speed changes.
- the invention is therefore the object of developing a known method for the regulation of the train in a band-shaped material between two clamping points to the effect that the tension control is more effective and faster.
- This object is achieved by the method claimed in claim 1.
- This method is characterized in that the controller output signal is varied at least temporarily as a function of a quantity g (t) representing the speed of the metal strip as part of its conversion into the actuating signal.
- the term "at least temporarily” means that the conversion according to the invention of the controller output signal into the control signal does not always have to take place during a tension control
- the conversion according to the invention can be subjected to tension control during individual phases, for example before the tension control has reached a steady state.
- a (physical) size representing the speed of the band-shaped material is to be interpreted broadly, meaning the speed of the metal band itself, but also any other physical quantity which gives an indication of the magnitude of the velocity of the metal band For example, it also includes the rotational speed or peripheral speed of rolls in a roll stand, if such a roll stand functions as a tie point in the sense of the invention act measured value.
- metal strip is used by way of example only in the present specification and claims, and is synonymous with strip material of any material to which the invention generally refers.
- the present invention relates only to train controls in which a rotary drive acts as an actuator and in which therefore an actuating signal specifies speeds or speed changes for the rotary drive.
- the essence of the invention is to be seen in the fact that the output signal of the tension controller - unlike in the prior art - does not serve directly as a control signal for a rotary drive in a clamping point, for example in a rolling mill, but previously processed or converted.
- This conversion according to the invention advantageously causes pre-controlled train disturbances in the metal strip caused by changes in speed.
- the inventive conversion of the controller output signal in the control signal for the rotary drive allows a hitherto typically very costly and time-consuming commissioning of a draft regulator can be significantly simplified and shortened.
- a variety of metal bands, which are currently used for test purposes, especially for jump tests, during commissioning, and the time required by specialized personnel, which has been required to adjust the Glasregler dynamics for different speed ranges, can be significantly reduced when using the method according to the invention.
- first variant and a second variant are described.
- Claims 2 to 4 relate to the first variant while claims 5 and 6 relate to the second variant.
- the following dependent claims 7 to 21 relate to both variants.
- the described in claim 2 first variant of the tension control according to the invention describes a feedforward, which does not have a speed-dependent influence on the system gain V (t) and yet necessary changes the Glasreglerausgangssignals R (t) relative to the speed of the metal band representing it size g (t ).
- This first variant of the tension control according to the invention operates with learning points. If the number of learning points is increased to infinity, the train correction is made directly dependent on the system speed and thus also on their system gain.
- control signal S (t) is calculated according to the first variant of the tension control according to the invention from the controller output signal R (t) according to the following formula:
- V (t) is an amplification factor which represents the course of the quantity g (t) representing the velocity of the metal strip (200) preferably normalized to the predetermined constant g (t 0 ) over time.
- Learning points t due to real interference, such. B. Manual Referenzzug sectionungen, redistributions, general disturbances from the process, etc. generated. Because of these disturbances / events, as also indicated in claim 3, the ambient conditions for the tension control change. The said learning points help to adapt the controller output immediately and exactly to the currently changed conditions of the mass flow.
- the first variant of the tension control according to the invention describes an adaptive precontrol.
- the train control becomes faster overall, the control signal S (t) is expected to drive only small, perhaps ideally even no corrections when the system changes its speed after and during a fault.
- the dependent claim 4 describes various situations when the train control is driven according to the first variant, d. H. under which conditions the actuating signal is preferably calculated according to formula 2. This is especially the case when the quantity representing the speed of the metal strip lies between an upper and a lower threshold value or when the mass flow, but another physical variable, is dominant for the dynamics of the tension control.
- the gain factor V (t) according to the above-mentioned formula 1 is again formed.
- the control signal S (t) is formed according to the following formula:
- the tension control can be switched from the second variant to the first variant as and as long as the size representing the speed of the metal strip, in particular the speed of the metal strip itself, exceeds a predetermined positive speed limit.
- This speed limit is defined, for example, by the lower threshold value g min i of variant 1, if it is greater than the upper threshold value g maX 2 of the second variant.
- g min i the upper threshold value
- g maX 2 the upper threshold value
- the temporary switching causes the mass flow rate correction to continue to change, but the train controller keeps the gain constant at high speeds.
- the controller gain must be z. B. be kept constant when the dynamics of the rotary actuators is the limiting factor for the dynamics of the tension controller or is.
- Both the first and the second variant are preferably run when the tension control is in a steady state.
- the gain factor V (t) may be restricted to a constant value if the quantity g (t) representing the speed of the metal strip exceeds a predetermined threshold value g maX i. This makes it possible, at high speeds, to keep the tension controller absolute and the controller gain constant.
- the limitation of the gain factor may be useful in the two variants of the train control. Also for both variants, it may be useful, the manipulated variable S (t) in dependence or relative to the speed of the metal strip restricting representative size. In mathematical terms, the following applies:
- control signal S (t) or the amplification factor V (t) in the first and / or in the second variant is calculated in each case taking into account the lead k of the metal strip, preferably by multiplication with a function f (k).
- the actuating signal S (t) is then calculated as follows:
- the actuating signal S (t) is calculated below
- the tension control according to the invention is even better pre-adjusted or speed controlled to disturbances and thereby more effective and even faster.
- the lead k itself can either depend on the quantity g (t) representing the velocity of the metal strip in the form k (g (t)) or be given as a constant.
- a derivative signal of the form dS (t) / dt is generated and output for controlling the rotary drive, the rotary drive can be controlled even more precisely, because with this derivative signal also a correction of the acceleration of the Rotary drive is possible. Also, the possibility of using the derivative signal exists in both the first and the second variant.
- control signal S (t) in the context of the present invention always specifies a rotational speed for a rotary drive
- the controller output signal R (t) can either a change of the rotational speed for the rotary drive or a thickness change for the metal strip in a rolling stand pretend. In the latter case, then a conversion of the controller output signal must be made in the control signal for the rotary drive.
- the two clamping points, between which the metal strip is clamped under tension may be two preferably adjacent rolling stands of a rolling train, wherein at least one of the rolling stands has the rotary drive for driving one of its rollers.
- a thickness control then takes place on the first rolling stand in the rolling direction and on the second rolling stand downstream in the rolling direction the tension control according to the invention with a control of the local rotary drive as an actuator. Due to the previous speed control, the downstream tension control is significantly relieved, ie the control signal only needs to output smaller changes in the speed to the rotary drive.
- the controller output signal on the one hand represents said change in the thickness decrease of the metal strip for the thickness control on the first stand and thus acts as a signal for reducing the thickness of the first stand.
- the controller output signal R (t) can then be converted on the other hand according to the first or second variant of the tension control according to the invention in the control signal for the rotary drive, wherein the conversion also includes a conversion of the change in thickness decrease in a change in rotational speed for the rotary drive.
- the train of the metal strip may alternatively be a pair of rollers as the first clamping point and in the rolling direction of the roller pair downstream coiler as the second clamping point.
- the rotary drive required for the tension control according to the invention can then be present either in the pair of rollers for rotational driving of at least one of its rollers and / or in the reel device for rotational driving of the reel.
- the pair of rollers may be a pair of drive rollers or a pair of work rolls in a rolling stand.
- Fig. 1 is a diagram of a train control according to the invention
- 2 shows a scheme for converting a controller output signal R (t) into an actuating signal S (t) according to the invention
- Fig. 3 exemplary waveforms for a first variant of
- FIG. 1 shows a scheme 100 of a tension control according to the present invention.
- the basis of the invention is a control loop for a tension control, as shown generally in FIG.
- the control circuit provides that the actual tension of a metal strip is measured by means of a detection device 160 or otherwise determined when the metal strip is clamped under tension between two tension points or passes through these tension points under tension.
- train is here synonymous with tensile stress.
- the actual train thus determined is compared in a setpoint / actual value comparator 110 with a predetermined desired train for the metal strip, and the result of this comparison, which is typically a difference, is called control deviation e (t) is output to a controller 120.
- the regulator device generates at its output a regulator output signal R (t).
- This regulator output signal R (t) typically represents a speed change for a rotary drive.
- the regulator output signal R (t) does not serve directly as a control signal for Actuation of an actuator 140 in the form of a rotary drive, but rather, the present invention provides that the controller output signal is first converted into a conversion means 130 in a suitable manner, as described below, in a control signal S (t). Only the actuator S (t) then actually serves to control the rotary drive 140.
- the rotary drive 140 is controlled so that the train of the metal strip 200 is controlled to the predetermined setpoint when the metal strip passes through the controlled system 150, which consists essentially of two clamping points consists.
- the control described preferably operates continuously in time, so that the initially described determination of the actual train of the metal strip within the controlled system takes place continuously and the determined actual train is continuously regulated to the predetermined desired train.
- FIG. 2 shows the functional structure of the conversion device 130 shown in FIG. 3 in detail.
- the conversion device 130 receives the regulator output signal R (t) as an input variable and outputs the said actuating signal S (t) as an output variable to the rotary drive 140 as an actuator.
- the conversion means 130 further receives a quantity g (t) representing the velocity of the metal strip 200. This may be the actual velocity of the metal strip itself, but may also be any other physical quantity act, which allows an indication of the size of the speed of the metal strip between the two clamping points.
- the derivative signal a (t) then allows acceleration correction for the rotary drive.
- Conversion device 130 may be operated in a first variant or alternatively in a second variant; Depending on the variant, the function blocks F1 and F2 are operated or designed differently within the conversion device 130. The respective different training or mode of operation of the conversion device 130 for both variants will be described primarily mathematically.
- the block F2 within the conversion means 130 provides the generation of a gain factor V (t), in which the received input signal g (t) is preferably normalized to a predetermined constant g (t 0 ).
- V (t) For both variants, the block F2 within the conversion means 130 provides the generation of a gain factor V (t), in which the received input signal g (t) is preferably normalized to a predetermined constant g (t 0 ).
- control signal S (t) as follows:
- a 1 (t) R (t) - (_A 1 (t Q + A 1 (t 1 ) + A 1 _ (t 2 ) +.. + A 1 (t n )) with £ m ⁇ £ (2.1 )
- a 2 t) V (_t) * (Z (t, + Z (A) + Z (t 2 ) -h. + Z (t) with t n t
- FIG. 3 illustrates the generation of the actuating signal S (t) as an output signal of the converter 130 according to the first variant on the basis of concrete examples for the input signals g (t) and R (t).
- the amplification factor V (t) in its time course is identical to the input signal g (t), ie the normalization factor g (t 0 ) has here been set to 1 by way of example.
- times t are defined as so-called learning times.
- learning times are defined as so-called learning times.
- g LP [m / s] Speed learning point with: g LPi speed at which a learning point is to be set; or
- the reference acceleration is preferred
- the learning time 1 is set at time t 0 or because the system starts an acceleration phase at time t 0 ;
- the variable g (t) representing the speed of the metal band changes from this point in time.
- the quantity g (t) increases at this time starting from a hitherto constant magnitude, ie at time t 0 a positive acceleration phase starts.
- the second learning time in Figure 3 is triggered because during the then prevailing negative acceleration phase, ie during the prevailing deceleration phase, the left-side limit of Ai (t) has a predetermined value Aimax. reaches or drops to this.
- the setting of the learning points in each case has the effect that the function Ai (t) at the learning times has a jump, because it is then calculated according to formula 2.1 from the controller output signal R (t) minus a certain amount. Due to the set learning points, the feedforward control is adapted immediately and precisely to the current conditions, in particular to speed-related changes in the mass flow.
- the future controller output signal R (t) ie the controller output signal after the set learning time in the form of the signal Z (t) copied to the pilot control branch; see Figure 2, so that the control signal S (t) does not change in total by setting the learning time.
- the newly learned mass flow disturbance is automatically pre-controlled by the conversion device 130 by the mass flow control by the control signal S (t) is again changed linearly to the system speed.
- the controller output signal R (t) must make no or only very minor corrections when the system changes speed, ie when a change in g (t) occurs ,
- FIG. 3 shows exemplary signal curves for the input signals R (t) and g (t) and the control signal S (t) calculated therefrom according to formula 2 in the conversion device 130.
- a comparison of the controller output signal R (t), which typically serves in the prior art directly as a control signal for a downstream rotary drive, with the control signal S (t) calculated according to the invention can be seen in particular between the times t 0 and t 2 that the controller output signal R ( t) was weighted or varied for calculating the actuating signal S (t) with the quantity g (t) representing the speed of the metal band or the amplification factor V (t).
- FIG. 1 An example of such a calculation of the actuating signal S (t) according to the second variant is shown in FIG.
- a comparison of the controller output signal R (t) with the actuating signal S (t) also shows that the controller output signal varies or depends on the amplification factor V (t) or on the quantity g (t) representing the speed of the metal band is weighted.
- the weighting in the second variant is much more immediate; This is shown by the actual proportional amplification of the local maxima and minima, especially in the area At. In the first variant, these are not amplified or only attenuated, as can be seen from the signal curve S (t) in FIG.
- the second variant can not only be driven when the tension control is in a steady state, but also before reaching the steady state, z. B. when threading metal strip in a system, in particular between the two clamping points, or in a Switzerland inconveniencesequenz, etc.
- the variant 2 then applies, for example, the following mathematical relationship:
- the tension control is in a steady state, it can be driven according to the invention either according to the first or the second variant.
- this steady state begins at the time t 0 at the speed g (t 0 ).
- the steady state can also be switched between the first and the second variant. Switching to the second variant can be done if a more favorable control behavior can be achieved by changing the speed of the system by also changing the dynamics of the tension controller due to the speed change.
- an adaptation of the dynamics takes place at least partially by the inventive conversion of the size R (t) into S (t) automatically.
- the direct amplification of the control signal R (t) in the conversion into the control signal S (t) has the advantage that a commissioning of the controller can be done faster because the dependence of the control dynamics of the speed at least partially by the inventive conversion R (t) is solved for S (t). Also, the resulting continuous adjustment of the dynamics of the controllers to the requirements of and after speed change may be more accurate over the conventional setting for different operating points.
- V (t) g max / g (t0), if g (t)> g maxi otherwise:
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017200560.2A DE102017200560A1 (en) | 2017-01-16 | 2017-01-16 | Method for a tension control |
PCT/EP2018/050720 WO2018130636A1 (en) | 2017-01-16 | 2018-01-12 | Method for tension control |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3568243A1 true EP3568243A1 (en) | 2019-11-20 |
EP3568243B1 EP3568243B1 (en) | 2021-03-10 |
Family
ID=60990811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18700485.8A Active EP3568243B1 (en) | 2017-01-16 | 2018-01-12 | Method for tension control |
Country Status (5)
Country | Link |
---|---|
US (1) | US11426778B2 (en) |
EP (1) | EP3568243B1 (en) |
DE (1) | DE102017200560A1 (en) |
RU (1) | RU2732460C1 (en) |
WO (1) | WO2018130636A1 (en) |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH353436A (en) | 1955-05-12 | 1961-04-15 | Bbc Brown Boveri & Cie | Process and device for keeping the strip tension constant in strip rolling mills |
AU475854B2 (en) * | 1972-09-06 | 1976-09-02 | Mitsubishi Electric Corporation | System for controlling rolling mills |
US3848443A (en) * | 1973-05-31 | 1974-11-19 | Westinghouse Electric Corp | Automatic control method and apparatus for a rolling mill |
US4132095A (en) * | 1977-08-04 | 1979-01-02 | United States Steel Corporation | Automatic gauge control method and apparatus for tandem strip mills |
US4307591A (en) * | 1980-03-31 | 1981-12-29 | Westinghouse Electric Corp. | Rolling mill looper control system |
US4662202A (en) * | 1985-07-23 | 1987-05-05 | Cargill, Incorporated | Low tension cascade mill speed control by current measurement with temperature compensation |
US4998427A (en) * | 1989-11-29 | 1991-03-12 | Aeg Westinghouse Industrial Automation Corporation | Method for rolling on-gauge head and tail ends of a workpiece |
US5012660A (en) * | 1989-11-29 | 1991-05-07 | Aeg Westinghouse Industrial Automation Corporation | Control system and method for compensating for speed effect in a tandem cold mill |
SU1738400A1 (en) * | 1990-04-02 | 1992-06-07 | Кузнецкий металлургический комбинат им.В.И.Ленина | Method and apparatus for controlling tension between mill stands |
GB9007854D0 (en) | 1990-04-06 | 1990-06-06 | Emhart Ind | Take out device |
US5103662A (en) * | 1990-05-01 | 1992-04-14 | Allegheny Ludlum Corporation | Tandem rolling mill tension control with speed ratio error discrimination |
FR2735046B1 (en) * | 1995-06-08 | 1997-07-11 | Lorraine Laminage | COLD ROLLING PROCESS WITH OVAL COMPENSATION OF THE ROLLING CYLINDERS. |
RU2268800C2 (en) * | 2002-12-19 | 2006-01-27 | Закрытое акционерное общество "Ново-Краматорский машиностроительный завод" | Method for controlling rolled strip tension between stands of multi-stand rolling mill with furnace coilers |
DE102006048421B4 (en) | 2006-10-12 | 2012-08-30 | Siemens Ag | Method for regulating a current train to a desired train by means of a train controller adapted by means of a model of the train control system |
EP2277639A1 (en) | 2009-07-15 | 2011-01-26 | Siemens Aktiengesellschaft | Ribbon stroke and loop control |
RU147042U1 (en) * | 2014-07-01 | 2014-10-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Магнитогорский государственный технический университет им. Г.И. Носова" | DEVICE FOR AUTOMATIC METAL TENSION ADJUSTMENT IN TWO INTERCELETE INTERMEDIATIONS OF THE ROLLING GROUP OF THE HOT ROLLING |
-
2017
- 2017-01-16 DE DE102017200560.2A patent/DE102017200560A1/en not_active Withdrawn
-
2018
- 2018-01-12 US US16/477,570 patent/US11426778B2/en active Active
- 2018-01-12 RU RU2019122255A patent/RU2732460C1/en active
- 2018-01-12 WO PCT/EP2018/050720 patent/WO2018130636A1/en active Application Filing
- 2018-01-12 EP EP18700485.8A patent/EP3568243B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
US11426778B2 (en) | 2022-08-30 |
US20190366403A1 (en) | 2019-12-05 |
RU2732460C1 (en) | 2020-09-16 |
WO2018130636A1 (en) | 2018-07-19 |
DE102017200560A1 (en) | 2018-07-19 |
EP3568243B1 (en) | 2021-03-10 |
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