EP3713686A1 - Vorrichtung zur steuerung eines streckreduzierwalzwerks - Google Patents
Vorrichtung zur steuerung eines streckreduzierwalzwerksInfo
- Publication number
- EP3713686A1 EP3713686A1 EP18807600.4A EP18807600A EP3713686A1 EP 3713686 A1 EP3713686 A1 EP 3713686A1 EP 18807600 A EP18807600 A EP 18807600A EP 3713686 A1 EP3713686 A1 EP 3713686A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall thickness
- pipe
- motors
- controlling
- time
- 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
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
- B21B37/78—Control of tube rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/10—Cross-sectional area
-
- 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
- B21B2275/04—Roll speed
-
- 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
- B21B37/72—Rear end control; Front end control
Definitions
- the invention relates to a method for controlling a stretch-reducing mill according to the preamble of claim 1.
- the used parent tubes or billets can have upset wall thicknesses at the ends, e.g. as a result of tool wear in the pre-aggregates. These upsets of the mother tubes cause additional thickening of the finished tube ends.
- the particular challenge is to promptly bring about the speed changes mentioned, since otherwise they have no effect on the end thickening.
- the strength of the speed change and the transition to the stationary speeds must be exactly matched, otherwise the sections adjacent to the tube ends may have impermissible undershoots of the desired wall thickness.
- the situation is further complicated by the fact that the speed curves of up to 32 drive motors are set. It does not succeed in predicting theoretical speed curves in advance, which achieve the best possible shortening of the thickened ends without further adaptation. For the operating teams, however, the manual adjustment of the speed curves is a difficult and time-consuming procedure. This problem has long been known and has led to further suggestions for possible automation.
- DE 1 962 792 A1 teaches the use of a puncture detection on the one hand by sensors in front of the SRW and on the other hand by detecting the engine speed change as a result of the load change when entering or leaving the tube from a rolling caliber.
- the position of the pipe ends can be tracked better and a partial automatic adaptation of the control parameters can be achieved.
- this form of tube tracking in the SRW is not suitable for rolling mills in which groups of rolling calibers are driven by common motors.
- the development of modern, frequency-controlled asynchronous motors has meant that the speed drops due to a load change are minimal and are barely recognizable by a pipe end control.
- Page 2 Solutions have also been proposed in which additional sensors, for example light barriers or photocells within the SRW, are to detect the current position of the front or rear end of the pipe and thus trigger the use of the speed control.
- additional sensors for example light barriers or photocells within the SRW
- JP H07246414 A describes an automatic adaptation of the engine speeds on the basis of pipe measurement data.
- the usage times and the duration of the effect are not adjusted. Both, however, have a high impact on the control result.
- the influence of the incoming pipe is not considered.
- a summary of several rolls to minimize the influence of measurement errors or outliers is not listed
- a disadvantage of the prior art is that the mill operator in practical operation usually or at least at the beginning of a rolling campaign must make corrective adjustments to the CEC. If necessary, e.g. As a result of tool wear, adjustments can also be made within a rolling campaign.
- a CEC independently monitors and evaluates the achieved wall thickness results at the pipe ends and adjusts the strength and timing of the speed change at the pipe ends for the following pipes.
- the time course of the speeds is characterized by the start time of the speed change and the end point of the speed change. It can be provided particularly advantageous that the time course is characterized by start time or end time and a rate of change.
- the evaluation of the wall thickness profile is made on at least three sections of the wall thickness profile.
- the evaluation of the wall thickness profile is made from a plurality of target variables.
- the method is combined with a wall thickness control system for automatically controlling the wall thickness outside the thickened ends.
- page 4 cyclic patterns, such patterns being taken into account in the control of the motors.
- the wall thickness profiles at the end of the ends can be examined for cyclic patterns and such patterns can be taken into account. Further preferably, it may be provided that the method is combined with a wall thickness control system for automatically controlling the wall thickness outside the thickened ends.
- Another measure improving the invention consists in an automatic puncture detection.
- Another measure improving the invention consists in a
- Another measure improving the invention consists in a specification of nominal or ideal shapes of the tube ends of each dimension.
- Another measure improving the invention is the use of pattern recognizing algorithms to evaluate the wall thickness profile of each pipe end.
- a further measure improving the invention consists in a simulation for the preliminary calculation of the effect of a setting change.
- Another measure improving the invention consists in an iteration of the CEC setting over a plurality of blades for finding a stable optimum
- Fig. 1 shows a schematic representation of a stretch-reducing mill with its control.
- a stretch-reducing mill comprises several rolls in rolling stands 1, which are driven by controllable motors.
- the stretching of a rolling stock 2 is carried out by targeted control of the motors at different speeds, so that the rolling stock is placed under tension between the rollers.
- the motors are supplied with electrical energy via a programmable logic controller (PLC) 3.
- PLC programmable logic controller
- the PLC 3 takes over the query and / or calculation of the speeds of the motors during the rolling process.
- the PLC 3 is connected via a network 4 in the form of a fieldbus system with sensors 5, 6, so that measured values flow directly into the PLC.
- the sensors 5 are connected via a network 4 in the form of a fieldbus system with sensors 5, 6, so that measured values flow directly into the PLC.
- the sensors 5 are exemplary position sensors, for example in the form of light barriers.
- the sensors 6 determine further measured values for monitoring the rolling process, in particular diameter, wall thickness and temperature of the rolling stock.
- the PLC 3 can also communicate via a non real-time capable network 7 with a process control computer 7a a process control level.
- a method according to the invention for controlling a stretch-reducing mill can be carried out.
- pipe ends of elongate pipes are optimized by the control of one or more engines of the draft reduction mill.
- the time profile of the speed changes of individual or all engines is automatically adjusted on the basis of the pipe wall thickness measurements.
- the time course of the speeds is characterized by the start time of the speed change and the end point of the speed change.
- the time course is also characterized by a rate of change of the speeds.
- An assessment of the wall thickness profile is made on at least three sections of the wall thickness profile.
- the evaluation of the wall thickness profile is made from several target values.
- the method for controlling the pipe end thickness is combined with a wall thickness control system for automatically controlling the wall thickness outside the thickened ends.
- the measured values by the sensors 6 are analyzed by means of programs, wherein the wall thickness profiles at the ends are examined for cyclic patterns and such patterns are taken into account in the control of the motors.
- the wall thickness profiles at the end of the ends are examined for cyclic patterns and such patterns are taken into account. Overall, the method is combined with a wall thickness control system for automatically controlling the wall thickness outside the thickened ends.
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 |
|---|---|---|---|
| DE102017220750.7A DE102017220750A1 (de) | 2017-11-21 | 2017-11-21 | Vorrichtung zur Steuerung eines Streckreduzierwalzwerks |
| PCT/EP2018/081896 WO2019101727A1 (de) | 2017-11-21 | 2018-11-20 | Vorrichtung zur steuerung eines streckreduzierwalzwerks |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3713686A1 true EP3713686A1 (de) | 2020-09-30 |
| EP3713686B1 EP3713686B1 (de) | 2022-10-05 |
| EP3713686B2 EP3713686B2 (de) | 2025-09-17 |
Family
ID=64453488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18807600.4A Active EP3713686B2 (de) | 2017-11-21 | 2018-11-20 | Vorrichtung zur steuerung eines streckreduzierwalzwerks |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US11602779B2 (de) |
| EP (1) | EP3713686B2 (de) |
| CN (1) | CN111372694A (de) |
| DE (1) | DE102017220750A1 (de) |
| ES (1) | ES2934481T5 (de) |
| MX (1) | MX2020005173A (de) |
| RU (1) | RU2748571C1 (de) |
| WO (1) | WO2019101727A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018217378B3 (de) * | 2018-10-11 | 2020-03-26 | Sms Group Gmbh | Wanddickenkontrolle beim Streckreduzieren von Rohren |
| CN113996663B (zh) * | 2021-12-31 | 2022-03-11 | 太原科技大学 | 无缝管张力减径工艺减径率分配修正方法及系统 |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1602181B2 (de) | 1967-10-06 | 1971-11-18 | Stahl- und Röhrenwerk Reisholz GmbH, 4000 Düsseldorf | Verfahren zur Verringerung verdickter Enden beim Streckreduzierwalzen von Rohren |
| GB1274698A (en) | 1969-12-12 | 1972-05-17 | Nippon Kokan Kk | Method and apparatus for stretch reducing |
| DE2347891C2 (de) | 1973-09-24 | 1983-04-21 | Kocks Technik Gmbh & Co, 4010 Hilden | Walzstraße zum Streckreduzieren von Rohren |
| US4002048A (en) | 1975-12-19 | 1977-01-11 | Aetna-Standard Engineering Company | Method of stretch reducing of tubular stock |
| SU715159A1 (ru) | 1977-03-09 | 1980-02-15 | Предприятие П/Я А-7697 | Устройство дл регулировани толщины стенки труб при редуцировании |
| DE2947233C2 (de) * | 1979-11-23 | 1992-03-12 | Kocks Technik Gmbh & Co, 4010 Hilden | Vorrichtung zur Steuerung der Wanddicke von Rohren |
| DE3028211C2 (de) | 1980-07-25 | 1986-10-16 | Kocks Technik Gmbh & Co, 4010 Hilden | Walzstraße zum Streckreduzieren von Rohren |
| JPS6021114A (ja) * | 1983-07-18 | 1985-02-02 | Kawasaki Steel Corp | 鋼管絞り圧延機の肉厚制御方法 |
| JPS62124007A (ja) * | 1985-11-20 | 1987-06-05 | Kawasaki Steel Corp | ストレツチレデユ−サの伸し長さ制御方法 |
| DE3643659A1 (de) | 1986-12-18 | 1988-07-07 | Mannesmann Ag | Verfahren zur steuerung der rohrwanddicke |
| DE3819571A1 (de) * | 1988-06-06 | 1989-12-07 | Mannesmann Ag | Verfahren zur regelung der wanddicke beim streckreduzieren von rohren |
| JPH06269831A (ja) † | 1993-03-23 | 1994-09-27 | Sumitomo Metal Ind Ltd | ストレッチレデューサの管端肉厚制御方法 |
| JPH07246414A (ja) | 1994-03-10 | 1995-09-26 | Nkk Corp | ストレッチレデューサーの管端部肉厚制御方法 |
| DE19840864C1 (de) * | 1998-08-31 | 1999-07-29 | Mannesmann Ag | Verfahren zur Minimierung verdickter Enden beim Walzen von Rohren in einem Streckreduzierwalzwerk |
| JP2001001019A (ja) † | 1999-06-24 | 2001-01-09 | Sumitomo Metal Ind Ltd | マンドレルミルによる素管の圧延方法及びマンドレルミル |
| DE10157742C1 (de) * | 2001-11-24 | 2003-06-18 | Sms Meer Gmbh | Verfahren zum Betreiben eines Streckreduzierwalzwerks und Streckreduzierwalzwerk |
| DE10201717C1 (de) * | 2002-01-18 | 2003-04-10 | Sms Meer Gmbh | Verfahren und Vorrichtung zum Walzen eines Rohres |
| JP4013659B2 (ja) * | 2002-06-13 | 2007-11-28 | 住友金属工業株式会社 | 管圧延機の肉厚制御方法 |
| JP4254341B2 (ja) † | 2003-05-16 | 2009-04-15 | 住友金属工業株式会社 | 金属管製造装置および金属管の肉厚制御方法 |
| JP4697605B2 (ja) * | 2004-03-30 | 2011-06-08 | 住友金属工業株式会社 | 管の定径圧延制御方法及び定径圧延制御装置 |
| CN100534656C (zh) * | 2007-03-29 | 2009-09-02 | 宝山钢铁股份有限公司 | 张减机钢管增厚端控制方法 |
| CN204523791U (zh) * | 2015-03-15 | 2015-08-05 | 邯郸市卓立精细板材有限公司 | 一种带钢厚度实时检测装置 |
| DE102015118065A1 (de) * | 2015-10-22 | 2017-04-27 | Hans Joachim Pehle | Verfahren zur Drehzahlanpassung von kontinuierlichen Rohrwalzwerken |
| CN206253457U (zh) * | 2016-12-12 | 2017-06-16 | 江苏飞翔精密机械制造有限公司 | 热轧钢管壁厚调节装置 |
-
2017
- 2017-11-21 DE DE102017220750.7A patent/DE102017220750A1/de active Pending
-
2018
- 2018-11-20 RU RU2020116417A patent/RU2748571C1/ru active
- 2018-11-20 ES ES18807600T patent/ES2934481T5/es active Active
- 2018-11-20 WO PCT/EP2018/081896 patent/WO2019101727A1/de not_active Ceased
- 2018-11-20 US US15/733,116 patent/US11602779B2/en active Active
- 2018-11-20 CN CN201880075226.4A patent/CN111372694A/zh active Pending
- 2018-11-20 EP EP18807600.4A patent/EP3713686B2/de active Active
- 2018-11-20 MX MX2020005173A patent/MX2020005173A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP3713686B1 (de) | 2022-10-05 |
| ES2934481T3 (es) | 2023-02-22 |
| DE102017220750A1 (de) | 2019-05-23 |
| MX2020005173A (es) | 2020-08-20 |
| RU2748571C1 (ru) | 2021-05-26 |
| CN111372694A (zh) | 2020-07-03 |
| ES2934481T5 (en) | 2026-02-13 |
| EP3713686B2 (de) | 2025-09-17 |
| WO2019101727A1 (de) | 2019-05-31 |
| US11602779B2 (en) | 2023-03-14 |
| US20200391263A1 (en) | 2020-12-17 |
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