WO2024088405A1 - 一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法 - Google Patents

一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法 Download PDF

Info

Publication number
WO2024088405A1
WO2024088405A1 PCT/CN2023/127277 CN2023127277W WO2024088405A1 WO 2024088405 A1 WO2024088405 A1 WO 2024088405A1 CN 2023127277 W CN2023127277 W CN 2023127277W WO 2024088405 A1 WO2024088405 A1 WO 2024088405A1
Authority
WO
WIPO (PCT)
Prior art keywords
torque
reel
magnetorheological fluid
reducer
synthesis
Prior art date
Application number
PCT/CN2023/127277
Other languages
English (en)
French (fr)
Inventor
韩晨
孙付涛
曹樱
张建辉
罗付华
韩正英
马书志
丁宏波
龚燃
赵京松
戴有涛
张玉杰
薛强
张京诚
王鹏
娄建亭
Original Assignee
中色科技股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中色科技股份有限公司 filed Critical 中色科技股份有限公司
Priority to DE112023000139.1T priority Critical patent/DE112023000139T5/de
Publication of WO2024088405A1 publication Critical patent/WO2024088405A1/zh

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/003—Regulation of tension or speed; Braking

Definitions

  • the invention relates to the technical field of metal strip foil rolling equipment, and in particular to a coiler structure for accurately controlling reel torque and a reel torque control method.
  • Coiler is an auxiliary equipment commonly used in the process of metal foil rolling production; during the rolling production of metal foil, the tension of the metal foil at the inlet and outlet of the rolling mill needs to be controlled.
  • the traditional inlet and outlet tension of the rolling mill is achieved by controlling the speed difference between the coiler reel and the working roll, or by controlling the torque of the coiler drive motor.
  • both tension control methods have the problems of long transmission chain, large moment of inertia, slow control response speed and low control accuracy of the drive system of the tension realization structure; for ordinary metal foil rolling production, the traditional tension realization structure can still meet the use requirements, but for the rolling production of precision metal foil, the requirements for the inlet and outlet tension control of the rolling mill are particularly strict.
  • the present invention discloses a winder structure and a winder torque control method for accurately controlling the torque of the reel, which adds a magnetorheological fluid clutch in series in the transmission chain of the traditional winder driving the reel, and achieves accurate control of the driving reel torque by accurately controlling the working torque of the magnetorheological fluid clutch, thereby achieving accurate control of the tension output from the reel working torque to the metal foil.
  • a winder structure for accurately controlling the torque of the reel including a frame, a reel, a magnetorheological fluid clutch, a reducer, a motor, and a torque synthesis reducer.
  • the reel is rotatably arranged on the frame, and the reducer is transmission-connected to the motor; a plurality of magnetorheological fluid clutches and torque synthesis reducers are arranged between the reducer and the reel for transmission connection; when the magnetorheological fluid clutch is working, its working torque is realized by the driving current, and when the driving current is changed, its working torque also changes accordingly, so the control of the working torque of the magnetorheological fluid clutch has the advantages of fast response speed and high control accuracy; in addition, when the magnetorheological fluid clutch is working, there is a speed difference between the driving shaft and the driven shaft, and the size of the speed difference has no effect on the working torque, thereby greatly reducing the requirements for the control accuracy of the speed difference between the reel and the working roller of the winder; and in addition, in the winder structure, After adding the magnetorheological fluid clutch, the transmission chain for controlling the reel driving torque can be greatly simplified, so the rotational inertia of the transmission system can be greatly reduced, and accordingly the control response speed is further improved
  • the torque synthesis reducer includes a torque synthesis reducer output shaft and a plurality of torque synthesis reducer input shafts, and the torque synthesis reducer output shaft and the plurality of torque synthesis reducer input shafts are meshed with gears and connected in transmission.
  • several magnetorheological fluid clutches, torque synthesis reducers and friction clutches are arranged between the reducer and the reel, and the reducer and the reel are connected through several magnetorheological fluid clutches, friction clutches and torque synthesis reducers; because the maximum working torque of the existing magnetorheological fluid clutch is limited, even if several magnetorheological fluid clutches are used to output a larger torque through a torque synthesis reducer, in some cases, such as hot rolling or cold rolling of thicker copper strips, the requirements of the winding machine reel for the driving torque cannot be met.
  • the reducer and the reel can be connected through a friction clutch, and the magnetorheological fluid clutch is in a non-working state, thereby meeting the requirements of the reel for the driving torque; when the thickness of the hot-rolled or cold-rolled copper strip is thin and the driving torque required by the reel is small, the transmission connection of the friction clutch between the reducer and the reel can be disconnected, and the transmission connection can be performed through several magnetorheological fluid clutches to meet the requirements for the control accuracy of the reel driving torque.
  • the torque synthesis reducer includes a plurality of torque synthesis reducer input shafts and a torque synthesis reducer main shaft, and the plurality of torque synthesis reducer input shafts and the torque synthesis reducer main shaft are meshed and connected by gears.
  • a method for accurately controlling the torque of a reel which realizes accurate control of the reel driving torque by accurately controlling the working torque of a plurality of magnetorheological fluid clutches; the control process includes the following steps:
  • the working speed of the magnetorheological fluid clutch is the speed difference between its torque input shaft and torque output shaft; for the coiler at the outlet end of the reversible rolling mill, the speed difference between the torque input shaft and the torque output shaft is set to be maintained between positive 20-80rpm, that is, the speed of the torque input shaft is higher than the speed of the torque output shaft; for the coiler at the inlet end of the reversible rolling mill, the speed difference between the torque input shaft and the torque output shaft is set to be maintained between negative 20-80rpm, that is, the speed of the torque input shaft is lower than the speed of the torque output shaft;
  • Mci is the torque allocated by a single magnetorheological fluid clutch
  • Mj is the torque required for the actual operation of the reel
  • I is the transmission ratio between the output shaft of the magnetorheological fluid clutch and the reel
  • n is the number of magnetorheological fluid clutches
  • T is the rolling tension
  • Rj is the outer diameter of the copper strip roll on the reel;
  • Magnetorheological fluid clutch working torque control the working torque of several magnetorheological fluid clutches is PID-controlled by feedback signals; during the feedback control process, only one of the several magnetorheological fluid clutches is adjusted and controlled; a threshold is set for the cumulative adjustment value of the torque of a magnetorheological fluid clutch; when the cumulative adjustment value of the torque of the magnetorheological fluid clutch under feedback control reaches or exceeds the set threshold, the feedback control process starts to feedback control another magnetorheological fluid clutch according to the set sequence; and so on, in the entire feedback control process, feedback control of each magnetorheological fluid clutch is achieved.
  • the present invention discloses a coiler structure and a coiler torque control method for accurately controlling the torque of the reel, which adds a magnetorheological fluid clutch in series in the transmission chain of the traditional coiler driving the reel, and realizes accurate control of the torque of the driving reel by accurately controlling the working torque of the magnetorheological fluid clutch, thereby realizing accurate control of the tension output from the working torque of the reel to the metal foil;
  • the coiler structure of the present invention makes full use of the characteristics of the magnetorheological fluid clutch that the working torque can be accurately controlled and the response speed is fast, which greatly improves the tension control accuracy of the metal foil rolling production, and lays a good equipment foundation for improving the technical level of the domestic metal rolling production industry and the production of precision metal foil.
  • FIG1 is a schematic diagram of the structure of a coiler for precisely controlling the reel torque
  • Figure 2 is a schematic diagram of the torque synthesis reducer structure
  • Figure 3 is a schematic diagram of the reducer structure 1
  • FIG4 is a second schematic diagram of the structure of a coiler for precisely controlling the torque of the reel
  • Figure 5 is a second schematic diagram of the torque synthesis reducer structure
  • Figure 6 is a schematic diagram of the reducer structure 2
  • FIG. 7 is a schematic diagram of a control flow for accurately controlling the reel torque.
  • a winding machine structure for accurately controlling the torque of a reel and a reel torque control method comprising a frame 1, a reel 2, a magnetorheological fluid clutch 3, a reducer 4, a motor 5, and a torque synthesis reducer 6, wherein the reel 2 is rotatably arranged on the frame 1;
  • the torque synthesis reducer 6 comprises a torque synthesis reducer output shaft 6.1 and three torque synthesis reducer input shafts 6.2, wherein the torque synthesis reducer output shaft 6.1 and the torque synthesis reducer input shaft 6.2 are connected by gear meshing and have a reduction ratio of 1:3;
  • the reducer 4 is provided with three reducer output shafts 4.2 and one reducer input shaft 4.1, wherein the reducer output shaft 4.2 and the reducer input shaft 4.1 have a reduction ratio of 1:10;
  • one end of the reel 2 is connected to the torque synthesis reducer output shaft 6.1 of the torque synthesis reducer 6 by a coupling transmission;
  • a winding machine structure for accurately controlling the torque of a reel and a reel torque control method comprising a frame 1, a reel 2, a magnetorheological fluid clutch 3, a reducer 4, a motor 5, a torque synthesis reducer 6, and a friction clutch 7.
  • the reel 2 is rotatably arranged on the frame 1; wherein the torque synthesis reducer 6 comprises a torque synthesis reducer main shaft 6.3 and three torque synthesis reducer input shafts 6.2, the torque synthesis reducer main shaft 6.3 and the torque synthesis reducer input shaft 6.2 are connected by gear meshing, and a reduction ratio of 1:2 is set; the reducer 4 is provided with three reducer output shafts 4.2, a reducer input shaft 4.1, a reducer main output shaft 4.3, the reducer output shaft 4.2 and the reducer A reduction ratio of 1:10 is set between the input shafts 4.1, and a reduction ratio of 1:20 is set between the reducer main output shaft 4.3 and the reducer input shaft 4.1; one end of the reel 2 is connected to one end of the torque synthesis reducer main shaft 6.3 of the torque synthesis reducer 6 through a coupling, and the other end of the torque synthesis reducer main shaft 6.3 is connected to the reducer main output shaft 4.3 of the reducer 4 through a friction clutch 7; the three
  • the reducer main output shaft 4.3 of the reducer 4 is actually directly connected to the reel 2 through the friction clutch 7.
  • the magnetorheological fluid clutch is in a non-working state (no working current) to meet the drive torque requirement of the reel 2;
  • the friction clutch 7 When the winder operates in the torque precision control mode, the friction clutch 7 is in the disconnected state, and the three magnetorheological fluid clutches 3 are in the working state (with working current).
  • the speed difference is set at 30rpm;
  • the working torque of the three magnetorheological fluid clutches 3 is synthesized into a larger working torque through the torque synthesis reducer 6, and output through the torque synthesis reducer main shaft 6.3 to provide a precise and controllable working torque for the driving reel 2;
  • the working torque of each magnetorheological fluid clutch is determined by the working current of the magnetorheological fluid clutch, and the working current is controlled by the tension control system of the rolling mill production line.
  • a control method for accurately controlling the torque of a reel which realizes accurate control of the driving torque of a reel 2 by accurately controlling the working torque of a plurality of magnetorheological fluid clutches 3; the control process includes the following steps:
  • the working speed of the magnetorheological fluid clutch 3 is the speed difference between its torque input shaft and torque output shaft, and the speed difference between the torque input shaft and the torque output shaft is set to be maintained at 30 rpm;
  • Mci is the torque allocated by a single magnetorheological fluid clutch 3
  • Mj is the torque required for the actual operation of the reel 2
  • I is the transmission ratio between the output shaft of the magnetorheological fluid clutch 3 and the reel 2
  • n is the number of magnetorheological fluid clutches 3
  • T is the rolling tension
  • Rj is the outer diameter of the copper strip roll on the reel 2;
  • working torque control of magnetorheological fluid clutch 3 the working torque of several magnetorheological fluid clutches 3 is PID-controlled by feedback signal; in the feedback control process, only one of the several magnetorheological fluid clutches 3 is adjusted and controlled, and a threshold value is set for the cumulative adjustment value of the torque of one magnetorheological fluid clutch 3; when the cumulative adjustment value of the torque of the magnetorheological fluid clutch 3 under feedback control reaches or exceeds the set threshold value, the feedback control process starts to feedback control another magnetorheological fluid clutch 3 according to the set sequence; and so on, in the whole feedback control process, feedback control of each magnetorheological fluid clutch 3 is realized.
  • the speed difference between the torque input shaft and the torque output shaft is set near the lower limit, usually at 30rpm; for example, the hot rough rolling speed of the copper strip is 150 m/min, and the reel 2
  • the winding outer diameter is 2m
  • the rotation speed of the reel 2 is calculated to be 23.885rpm.
  • the rotation speed of the torque input shaft 2.3.2 of the torque synthesis reducer 2.3 is calculated to be 71.656rpm.
  • the rotation speed of the torque input shaft of the magnetorheological fluid clutch 3 is 101.656rpm.
  • the reduction ratio of the gearbox 2.5 is 10
  • the final calculated rotation speed of the motor 2.6 is 1016.56rpm.
  • the control process of precisely controlling the reel torque is specifically shown in Figure 6 of the specification.
  • the rolling tension control process actually includes an initial torque distribution process 8, a magnetorheological fluid clutch 3 working torque sorting process 9, and a feedback control loop process 10.
  • the following takes the final pass rolling of the hot rough rolling of the copper strip as an example to illustrate the control process of the rolling tension of the precision copper strip during the hot rough rolling process.
  • the rolling parameters are as follows:
  • the finished product thickness of hot rough rolled copper strip is 1.5mm, with a thickness deviation of ⁇ 0.001mm; the inner diameter of the coil is 610mm, and the outer diameter of the coil is ⁇ 1850mm; the coiling speed is 5m/min, the rolling speed is 180m/min, and the acceleration time is 30s; the coiling tension is 1.0KN, the rolling tension is 10KN, and the rolling tension fluctuation range is allowed to be ⁇ 0.5%;
  • the parameters of the magnetorheological fluid clutch 3 are as follows: maximum working torque 2.0KN*m, starting torque (under non-control state) 0.01KN*m; for the convenience of explanation, it is assumed that the control current and the working torque are in a linear relationship (actually a non-linear relationship), the linear coefficient is 0.25KN*m/A, and the working current control accuracy is 10.0mA;
  • Working torque sorting process 9 of the magnetorheological fluid clutch 3 Assuming that the three magnetorheological fluid clutches 3 are A, B, and C, because their initial working torques are evenly distributed, their order after random sorting is A, B, and C;
  • Feedback control loop process 10 As the speed of the working roll gradually increases, the speed and rolling tension of the reel 2 also gradually increase, and the target value after the rolling tension is increased is given by the control system; when the actual tension value detected by the sensor according to the set period deviates from the target value after the rolling tension is increased, the control system outputs a feedback control signal through PID control operation, and the feedback control signal is introduced into the reel tension control process.
  • the control direction of the feedback signal is determined (positive direction is to increase the working torque, and reverse direction is to reduce the working torque), and then the working torque of the magnetorheological fluid clutch 3C is increased according to the A, B, C sequence of the magnetorheological fluid clutch 3.
  • the feedback control loop process 10 is re-entered.
  • the working torque of the magnetorheological fluid clutch 3B will continue to be positively feedback controlled; after several feedback control loop processes 10, the cumulative torque adjustment value of the magnetorheological fluid clutch 3B will exceed the set threshold value of 0.01KN*m, and the working torque sorting process 9 is re-entered at this time, and the three magnetorheological fluid clutches 3A, B, and C are re-sorted according to the torque size, and the sorting result is B, C, A (or because the working torques of C and B are equal, the sorting result is C, B, A, and the sorting of C and B is randomly generated);
  • the final rolling of the hot rough-rolled copper strip gradually enters the stable rolling stage from the coiling stage.
  • the working torque of the three magnetorheological fluid clutches 3A, B, and C increases from the initial 0.0339 KN*m to more than 1.1 KN*m (the coil diameter increases, and the actual working torque of the three magnetorheological fluid clutches 3A, B, and C will exceed 1.1 KN*m when entering the stable rolling stage); after entering the stable rolling stage, as the coil diameter continues to increase, the actual working torque of the three magnetorheological fluid clutches 3A, B, and C will continue to increase.
  • the rolling tension is always stably controlled at 10 KN and remains unchanged;
  • the working current control accuracy of the magnetorheological fluid clutch 3 is 10.0mA, that is, in a feedback control cycle process 10
  • the working torque change of the magnetorheological fluid clutch 3 is 0.0025KN*m, which causes the working torque change of the reel 2 to be 0.0075KN*m.
  • the maximum change in rolling tension is 0.00544KN
  • its control accuracy is 0.0544%, which is much higher than the ⁇ 0.5% range of the allowable fluctuation of the rolling tension during the final pass of hot rough rolling of the precision copper strip. Therefore, its extremely high rolling tension control accuracy fully guarantees the dimensional accuracy of the precision copper strip after rough rolling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

一种精确控制卷轴扭矩的卷取机结构，包括机架（1）、卷轴（2）、磁流变液离合器（3）、减速机（4）、电机（5）、扭矩合成减速机（6），卷轴转动设置在机架上，减速机与电机传动连接，减速机与卷轴之间通过若干个磁流变液离合器和扭矩合成减速机传动连接。以及一种精确控制卷轴扭矩的卷取机的扭矩控制方法。通过在传统卷取机驱动卷轴的传动链中，串联增加了磁流变液离合器，通过对磁流变液离合器工作扭矩的精确控制，实现了对驱动卷轴扭矩的精确控制，从而对由卷轴工作扭矩输出到金属带箔的张力实现精确控制，极大提高了金属带箔轧制生产的张力控制精度，为金属轧制生产行业技术水平提升及精密金属带箔轧制生产打下了良好的设备基础。

Description

一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法 技术领域
本发明涉及金属带箔轧制设备技术领域，具体涉及一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法。
 背景技术
卷取机是金属带箔轧制生产过程中普遍用到的辅助设备；金属带箔在轧制生产过程中，需控制轧机入口及出口处金属带箔的张力，传统的轧机入口及出口张力，是通过控制卷取机卷轴与工作辊之间的转速差来实现，或通过控制卷取机驱动电机的扭矩来实现，但这两种张力控制方式均存在张力实现结构的驱动系统传动链长、转动惯量大、控制响应速度慢、控制精度低的问题；对于普通金属带箔轧制生产，传统的张力实现结构尚能满足使用要求，但对于精密金属带箔的轧制生产，对轧机入口及出口张力控制的要求尤其严格，传统的张力实现结构对精密金属带箔轧制生产的张力控制已显得有些“力不从心”，因此如何进一步提高精密金属带箔轧制生产中的张力控制精度，已经成为国内金属轧制生产行业亟待解决的技术瓶颈。
 发明内容
为了克服背景技术中的不足，本发明公开了一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法，其通过在传统卷取机驱动卷轴的传动链中，串联增加了磁流变液离合器，通过对磁流变液离合器的工作扭矩的精确控制，实现对驱动卷轴扭矩的精确控制，从而对由卷轴工作扭矩输出到金属带箔的张力实现精确控制。
为了实现所述发明目的，本发明采用如下技术方案：一种精确控制卷轴扭矩的卷取机结构，包括机架、卷轴、磁流变液离合器、减速机、电机、扭矩合成减速机，卷轴转动设置在机架上，减速机与电机传动连接；减速机与卷轴之间设置通过若干个磁流变液离合器和扭矩合成减速机传动连接；磁流变液离合器工作时，其工作扭矩是通过驱动电流实现，当改变驱动电流大小时，其工作扭矩也相应发生改变，因此对磁流变液离合器的工作扭矩的控制具有响应速度快、控制精度高的优点；另外磁流变液离合器工作时，主动轴和从动轴之间存在转速差，且转速差的大小对工作扭矩无影响，因此极大降低了卷取机卷轴与工作辊之间转速差控制精度的要求；还有，在卷取机结构中增加磁流变液离合器之后，控制卷轴驱动扭矩的传动链得以大幅简化，因此传动系统的转动惯量也得以大幅降低，因此相应的也进一步提高了控制响应速度；因现有磁流变液离合器的最大工作扭矩有限，对轧制张力要求较高的卷取机，仅仅通过一个磁流变液离合器尚无法为卷轴提供足够的驱动扭矩，因此采用若干个磁流变液离合器通过扭矩合成减速机输出更大的扭矩，解决了磁流变液离合器工作扭矩较小与卷轴所需扭矩较大的矛盾；在采用若干个磁流变液离合器通过扭矩合成减速机合成更大的驱动扭矩时，对扭矩合成减速机输出扭矩的控制，是通过对若干个磁流变液离合器工作扭矩的轮流控制来实现，避免出现若干个磁流变液离合器的工作扭矩出现差异过大的问题。
进一步的，扭矩合成减速机包括扭矩合成减速机输出轴、若干扭矩合成减速机输入轴，扭矩合成减速机输出轴与若干扭矩合成减速机输入轴之间通过齿轮啮合，传动连接。
优选的，减速机与卷轴之间设置有若干个磁流变液离合器、扭矩合成减速机、摩擦离合器，减速机与卷轴之间通过若干个磁流变液离合器、摩擦离合器和扭矩合成减速机传动连接；因现有磁流变液离合器的最大工作扭矩有限，即使采用若干个磁流变液离合器通过扭矩合成减速机的方式输出更大的扭矩，但在某些情况下，如较厚铜带的热轧或冷轧时，仍然无法满足卷取机卷轴对驱动扭矩的要求，此时减速机与卷轴之间可通过摩擦离合器传动连接，磁流变液离合器处于非工作状态，满足卷轴对驱动扭矩的要求；当铜带热轧或冷轧的厚度较薄，卷轴所需驱动扭矩较小时，可断开减速机与卷轴之间的摩擦离合器的传动连接，通过若干个磁流变液离合器进行传动连接，满足对卷轴驱动扭矩控制精度的要求。
进一步的，扭矩合成减速机包括若干扭矩合成减速机输入轴、扭矩合成减速机主轴，若干扭矩合成减速机输入轴与扭矩合成减速机主轴之间通过齿轮啮合，传动连接。
一种精确控制卷轴扭矩的控制方法，通过精确控制若干个磁流变液离合器的工作扭矩，实现对卷轴驱动扭矩的精确控制；其控制过程包括以下步骤：
S1、磁流变液离合器工作速度设置：磁流变液离合器工作速度为其扭矩输入轴与扭矩输出轴的转速差；对于可逆轧机出口端的卷取机，扭矩输入轴与扭矩输出轴的转速差设置维持在正20-80rpm之间，即扭矩输入轴转速高于扭矩输出轴转速；对于可逆轧机入口端的卷取机，扭矩输入轴与扭矩输出轴的转速差设置维持在负20-80rpm之间，即扭矩输入轴转速低于扭矩输出轴转速；
S2、磁流变液离合器工作扭矩分配：其初始工作扭矩以卷轴实际工作所需扭矩平均分配给若干个磁流变液离合器，计算公式为：
Mci=Mj/I*n    ......(1)
Mj=T*Rj       ......(2)
其中：Mci为单个磁流变液离合器分配的扭矩；Mj为卷轴实际工作所需扭矩；I为磁流变液离合器输出轴与卷轴之间的传动比；n为磁流变液离合器数量；T为轧制张力；Rj为卷轴上铜带卷的外径；
S3、磁流变液离合器工作扭矩控制：若干个磁流变液离合器工作扭矩由反馈信号形成PID控制；反馈控制过程中，仅对若干个磁流变液离合器中的一个进行工作扭矩调整控制；一个磁流变液离合器的扭矩累计调整值设定有一个阈值；当被反馈控制的磁流变液离合器的扭矩累计调整值达到或超出设定阈值时，反馈控制过程开始按设定排序对另一个磁流变液离合器进行反馈控制；依次类推，在整个反馈控制过程中，实现对每个磁流变液离合器的反馈控制。
由于采用如上所述的技术方案，本发明具有如下有益效果：本发明公开的一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法，其通过在传统卷取机驱动卷轴的传动链中，串联增加了磁流变液离合器，通过对磁流变液离合器的工作扭矩的精确控制，实现对驱动卷轴扭矩的精确控制，从而对由卷轴工作扭矩输出到金属带箔的张力实现精确控制；本发明的卷取机结构充分利用了磁流变液离合器工作扭矩可精确控制、响应速度快的特点，极大提高了金属带箔轧制生产的张力控制精度，为国内金属轧制生产行业技术水平提升及精密金属带箔生产打下了良好的设备基础。
 附图说明
图1为精确控制卷轴扭矩的卷取机结构示意图一；
图2为扭矩合成减速机结构示意图一；
图3为减速机结构示意图一；
图4为精确控制卷轴扭矩的卷取机结构示意图二；
图5为扭矩合成减速机结构示意图二；
图6为减速机结构示意图二；
图7为精确控制卷轴扭矩的控制流程示意图。
图中：1、机架；2、卷轴；3、磁流变液离合器；4、减速机；4.1、减速机输入轴；4.2、减速机辅助输出轴；4.3、减速机主输出轴；5、电机；6、扭矩合成减速机；6.1、扭矩合成减速机输出轴；6.2、扭矩合成减速机输入轴；6.3、扭矩合成减速机主轴；7、摩擦离合器；8、初始扭矩分配流程；9、工作扭矩排序流程；10、反馈控制循环流程。
 具体实施方式
通过下面的实施例可以详细的解释本发明，公开本发明的目的旨在保护本发明范围内的一切技术改进。
实施例一：
一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法，包括机架1、卷轴2、磁流变液离合器3、减速机4、电机5、扭矩合成减速机6，卷轴2转动设置在机架1上；其中扭矩合成减速机6包括一个扭矩合成减速机输出轴6.1、三个扭矩合成减速机输入轴6.2，扭矩合成减速机输出轴6.1与扭矩合成减速机输入轴6.2之间通过齿轮啮合连接，且设有1:3的减速比；减速机4设有三个减速机输出轴4.2和一个减速机输入轴4.1，减速机输出轴4.2和减速机输入轴4.1之间设有1:10的减速比；卷轴2的一端与扭矩合成减速机6的扭矩合成减速机输出轴6.1之间通过联轴器传动连接；扭矩合成减速机6的三个扭矩合成减速机输入轴6.2与减速机4的三个减速机输出轴4.2之间，通过三个磁流变液离合器3对应传动连接；减速机4的减速机输入轴4.1与电机5的驱动轴通过联轴器传动连接；磁流变液离合器3工作时，其输入轴与输出轴之间存在转速差，转速差设置在30rpm；三个磁流变液离合器3的工作扭矩经扭矩合成减速机合成为更大的工作扭矩，经合成减速机输出轴6.1输出，为驱动卷轴2提供精确可控的工作扭矩；每个磁流变液离合器的工作扭矩由磁流变液离合器的工作电流决定，工作电流大小则有轧机生产线的张力控制系统进行控制，通过对三个磁流变液离合器工作电流大小的轮流控制，避免出现三个磁流变液离合器3的工作扭矩出现差异过大的问题。
实施例二：
一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法，包括机架1、卷轴2、磁流变液离合器3、减速机4、电机5、扭矩合成减速机6、摩擦离合器7，卷轴2转动设置在机架1上；其中扭矩合成减速机6包括一个扭矩合成减速机主轴6.3、三个扭矩合成减速机输入轴6.2，扭矩合成减速机主轴6.3与扭矩合成减速机输入轴6.2之间通过齿轮啮合连接，且设有1:2的减速比；减速机4设有三个减速机输出轴4.2、一个减速机输入轴4.1、一个减速机主输出轴4.3，减速机输出轴4.2和减速机输入轴4.1之间设有1:10的减速比，减速机主输出轴4.3和减速机输入轴4.1之间设有1:20的减速比；卷轴2的一端与扭矩合成减速机6的扭矩合成减速机主轴6.3的一端通过联轴器传动连接，扭矩合成减速机主轴6.3的另一端与减速机4的减速机主输出轴4.3通过摩擦离合器7传动连接；扭矩合成减速机6的三个扭矩合成减速机输入轴6.2与减速机4的三个减速机输出轴4.2，通过三个磁流变液离合器3对应传动链接；减速机4的减速机输入轴4.1与电机5的驱动轴通过联轴器传动连接；
当卷取机工作在大扭矩模式时，减速机4的减速机主输出轴4.3与卷轴2之间实际直接通过摩擦离合器7传动连接，此时磁流变液离合器处于非工作状态(没有工作电流），以满足卷轴2对驱动扭矩的要求；
当卷取机工作在扭矩精确控制模式时，摩擦离合器7处于断开状态，三个磁流变液离合器3处于工作状态(有工作电流），三个磁流变液离合器3输入轴与输出轴之间存在转速差，转速差设置在30rpm；三个磁流变液离合器3的工作扭矩经扭矩合成减速机6合成为更大的工作扭矩，经扭矩合成减速机主轴6.3输出，为驱动卷轴2提供精确可控的工作扭矩；每个磁流变液离合器的工作扭矩由磁流变液离合器的工作电流决定，工作电流大小则有轧机生产线的张力控制系统进行控制，通过对三个磁流变液离合器工作电流大小的轮流控制，避免出现三个磁流变液离合器3的工作扭矩出现差异过大的问题。
一种精确控制卷轴扭矩的控制方法，通过精确控制若干个磁流变液离合器3的工作扭矩，实现对卷轴2驱动扭矩的精确控制；其控制过程包括以下步骤：
S1、磁流变液离合器3工作速度设置：磁流变液离合器3工作速度为其扭矩输入轴与扭矩输出轴的转速差，扭矩输入轴与扭矩输出轴的转速差设置维持在30rpm；
S2、磁流变液离合器3工作扭矩分配：其初始工作扭矩以卷轴2实际工作所需扭矩平均分配给若干个磁流变液离合器3，计算公式为：
Mci=Mj/I*n    ......(1)
Mj=T*Rj       ......(2)
其中：Mci为单个磁流变液离合器3分配的扭矩；Mj为卷轴2实际工作所需扭矩；I为磁流变液离合器3输出轴与卷轴2之间的传动比；n为磁流变液离合器3数量；T为轧制张力；Rj为卷轴2上铜带卷的外径；
S3、磁流变液离合器3工作扭矩控制：若干个磁流变液离合器3工作扭矩由反馈信号形成PID控制；反馈控制过程中，仅对若干个磁流变液离合器3中的一个进行工作扭矩调整控制，一个磁流变液离合器3的扭矩累计调整值设定有一个阈值；当被反馈控制的磁流变液离合器3的扭矩累计调整值达到或超出设定阈值时，反馈控制过程开始按设定排序对另一个磁流变液离合器3进行反馈控制；依次类推，在整个反馈控制过程中，实现对每个磁流变液离合器3的反馈控制。
补充说明的是：在卷取机卷轴2的扭矩控制过程中，实际还包括卷轴2转速的控制，其控制结构和方法与现有技术基本相同，在此不再详细赘述；其不同之处在于：相对于现有卷轴2转速的控制，计算出的电机转速要适当提高，确保磁流变液离合器3的扭矩输入轴与扭矩输出轴的转速差维持在20-80rpm之间，通常为降低磁流变液离合器3在工作中的发热，扭矩输入轴与扭矩输出轴的转速差设定在下限附近，通常设置在30rpm；例如铜带热粗轧速度为150米/分，卷轴2的卷取外径为2m，计算出卷轴2的旋转速度为23.885rpm，根据扭矩合成减速机2.3的扭矩输入轴2.3.2与扭矩输出轴2.3.1之间3:1的减速比，计算出扭矩合成减速机2.3的扭矩输入轴2.3.2转速为71.656rpm，根据磁流变液离合器3扭矩输入轴与扭矩输出轴的转速差30rpm，则磁流变液离合器3的扭矩输入轴转速为101.656rpm；假设变速箱2.5的减速比为10，则最终计算得到的电机2.6的转速为1016.56rpm；
精确控制卷轴扭矩的控制流程具体参见说明书附图6，在轧制张力控制流程中实际包括初始扭矩分配流程8、磁流变液离合器3工作扭矩排序流程9、反馈控制循环流程10；下面以铜带热粗轧最终道次轧制为例，说明精密铜带在热粗轧过程中其轧制张力的控制过程，其轧制参数如下：
热粗轧铜带成品厚度1.5mm，厚度偏差±0.001mm；带卷内径610mm，带卷外径Φ1850 mm；起卷速度5m/min，轧制速度180m/min，加速时间30s；起卷张力1.0KN，轧制张力10KN，轧制张力允许波动范围±0.5%；
磁流变液离合器3参数如下：最大工作扭矩2.0KN*m，起始扭矩（非控制状态下）0.01KN*m；为方便说明，假设控制电流与工作扭矩为线性关系（实际为非线性关系），其线性系数为0.25KN*m/A，工作电流控制精度为10.0mA；
初始扭矩分配流程8：起卷时三个磁流变液离合器3工作扭矩分配如下：起卷时卷轴2实际工作扭矩为：Mj=T*Rj=1.0*0.305=0.305KN*m，每个磁流变液离合器3平均分配工作扭矩为Mci=Mj/I*n=0.305/（3*3）=0.0339KN*m，因此每个磁流变液离合器3的工作电流为95.6mA；设定每个磁流变液离合器3的累计扭矩调整阈值为0.01KN*m；
磁流变液离合器3工作扭矩排序流程9：假设三个磁流变液离合器3分别为A、B、C，因其初始工作扭矩平均分配，其随机排序后前后顺序为A、B、C；
反馈控制循环流程10：随着工作辊转速逐渐提高，卷轴2的转速和轧制张力也逐渐升高，轧制张力升高后的目标值由控制系统给出；当传感器按设定周期检测出的实际张力值与轧制张力升高后的目标值出现偏差，控制系统通过PID控制运算输出反馈控制信号，反馈控制信号导入卷轴张力控制流程，首先判断反馈信号控制方向（正向为增大工作扭矩，反向为减小工作扭矩），然后按照已经排定磁流变液离合器3的A、B、C顺序，对磁流变液离合器3C进行增大工作扭矩的控制；在每一个反馈控制循环流程10周期中，均需判断磁流变液离合器3C的扭矩累计调整值是否超过设定阈值0.01KN*m，如果没有超过，则进入下一周期的反馈控制循环；当在后续控制循环中，磁流变液离合器3C的扭矩累计调整值超过设定阈值0.01KN*m时，则重新进入工作扭矩排序流程9，从新对三个磁流变液离合器3A、B、C按照扭矩大小进行排序，排序结果为C、A、B（因C的工作扭矩最大，故排在第一位，A、B的排序为随机生成）；
磁流变液离合器3工作扭矩排序流程9结束后，重新进入反馈控制循环流程10，在新的反馈控制循环流程10中，会持续对磁流变液离合器3B的工作扭矩进行进行正向反馈控制；在经过若干个反馈控制循环流程10后，磁流变液离合器3B的扭矩累计调整值会超过设定阈值0.01KN*m，此时重新进入工作扭矩排序流程9，对三个磁流变液离合器3A、B、C按照扭矩大小从新进行排序，排序结果为B、C、A（或因C 、B工作扭矩相等，排序结果为C、B、A，C、B的排序为随机生成）；
以上述工作扭矩排序流程9、与反馈控制循环流程10的反复执行，热粗轧铜带最终道次轧制逐渐从起卷阶段进入稳定轧制阶段，在此过程中，三个磁流变液离合器3A、B、C的工作扭矩从最初的0.0339KN*m，增加至1.1KN*m以上（带卷直径增加，进入稳定轧制阶段时三个磁流变液离合器3A、B、C的实际工作扭矩会超过1.1KN*m）；进入稳定轧制阶段后，随着带卷直径持续增加，三个磁流变液离合器3A、B、C的实际工作扭矩会持续增加，在精密铜板带轧制生产线的轧制张力控制流程控制之下，轧制张力始终稳定控制在10KN保持不变；
轧制张力控制精度分析：以稳定轧制阶段轧制张力控制为例，磁流变液离合器3的工作电流控制精度为10.0mA，即在一个反馈控制循环流程10中，磁流变液离合器3的工作扭矩变化量为0.0025KN*m，其所导致卷轴2的工作扭矩变化量为0.0075KN*m，以最大带卷直径1450mm计算，最终引起轧制张力的最大变化量为0.00544KN，其控制精度为0.0544%，远远高于精密铜带热粗轧最终道次轧制时轧制张力所允许波动的±0.5%的范围，因此其极高的轧制张力控制精度充分保证了精密铜带粗轧后的尺寸精度。
本发明未详述部分为现有技术。

Claims (5)

  1. 一种精确控制卷轴扭矩的卷取机结构，包括机架（1）、卷轴（2）、磁流变液离合器（3）、减速机（4）、电机（5）、扭矩合成减速机（6），卷轴（2）转动设置在机架（1）上，减速机（4）与电机（5）传动连接；其特征是：减速机（4）与卷轴（2）之间通过若干个磁流变液离合器（3）和扭矩合成减速机（6）传动连接。
  2. 根据权利要求2所述精确控制卷轴扭矩的卷取机结构，其特征是：扭矩合成减速机（6）包括扭矩合成减速机输出轴（6.1）、若干扭矩合成减速机输入轴（6.2），扭矩合成减速机输出轴（6.1）与若干扭矩合成减速机输入轴（6.2）之间通过齿轮啮合，传动连接。
  3. 根据权利要求1所述精确控制卷轴扭矩的卷取机结构，其特征是：减速机（4）与卷轴（2）之间设置有若干个磁流变液离合器（3）、扭矩合成减速机（6）、摩擦离合器（7），减速机（4）与卷轴（2）之间通过若干个磁流变液离合器（3）、摩擦离合器（7）和扭矩合成减速机（6）传动连接。
  4. 根据权利要求3所述精确控制卷轴扭矩的卷取机结构，其特征是：扭矩合成减速机（6）包括若干扭矩合成减速机输入轴（6.2）、扭矩合成减速机主轴（6.3），若干扭矩合成减速机输入轴（6.2）与扭矩合成减速机主轴（6.3）之间通过齿轮啮合，传动连接。
  5. 一种基于权利要求2或4所述精确控制卷轴扭矩的卷取机的扭矩控制方法，其特征是：通过精确控制若干个磁流变液离合器（3）的工作扭矩，实现对卷轴（2）驱动扭矩的精确控制；其控制过程包括以下步骤：
    S1、磁流变液离合器（3）工作速度设置：磁流变液离合器（3）工作速度为其扭矩输入轴与扭矩输出轴的转速差；可逆轧机（1）出口端的卷取机（2），其扭矩输入轴转速高于扭矩输出轴转速；可逆轧机（1）入口端的卷取机（2），其扭矩输入轴转速低于扭矩输出轴转速；扭矩输入轴与扭矩输出轴的转速差设置维持在20-80rpm之间；
    S2、磁流变液离合器（3）工作扭矩分配：其初始工作扭矩以卷轴（2.2）实际工作所需扭矩平均分配给若干个磁流变液离合器（3），计算公式为：
    Mci=Mj/I*n    ......(1)
    Mj=T*Rj       ......(2)
    其中：Mci为单个磁流变液离合器（3）分配的扭矩；Mj为卷轴（2.2）实际工作所需扭矩；I为磁流变液离合器（3）输出轴与卷轴（2.2）之间的传动比；n为磁流变液离合器（3）数量；T为轧制张力；Rj为卷轴（2.2）上铜带卷的外径；
    S3、磁流变液离合器（3）工作扭矩控制：若干个磁流变液离合器（3）工作扭矩由反馈信号形成PID控制；反馈控制过程中，仅对若干个磁流变液离合器（3）中的一个进行工作扭矩调整控制；一个磁流变液离合器（3）的扭矩累计调整值设定有一个阈值，当被反馈控制的磁流变液离合器（3）的扭矩累计调整值达到或超出设定阈值时，反馈控制过程开始按设定排序对另一个磁流变液离合器（3）进行反馈控制；依次类推，在整个反馈控制过程中，实现对每个磁流变液离合器（3）的反馈控制。
PCT/CN2023/127277 2022-10-28 2023-10-27 一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法 WO2024088405A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112023000139.1T DE112023000139T5 (de) 2022-10-28 2023-10-27 Eine Haspelstruktur zur präzisen Steuerung des Rollendrehmoments und ein Verfahren zur Steuerung des Rollendrehmoments

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211341223.5A CN115647072B (zh) 2022-10-28 2022-10-28 一种精确控制卷轴扭矩的卷取机扭矩控制方法
CN202211341223.5 2022-10-28

Publications (1)

Publication Number Publication Date
WO2024088405A1 true WO2024088405A1 (zh) 2024-05-02

Family

ID=84992588

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/127277 WO2024088405A1 (zh) 2022-10-28 2023-10-27 一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法

Country Status (3)

Country Link
CN (1) CN115647072B (zh)
DE (1) DE112023000139T5 (zh)
WO (1) WO2024088405A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115647072B (zh) * 2022-10-28 2024-05-28 中色科技股份有限公司 一种精确控制卷轴扭矩的卷取机扭矩控制方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55142452A (en) * 1979-04-19 1980-11-07 Matsushita Electric Ind Co Ltd Tape tension controlling unit for magnetic recording and reproducing unit
JPH05204467A (ja) * 1992-01-30 1993-08-13 Toshiba Corp リールの張力制御方法およびその制御装置
CN101863437A (zh) * 2010-06-18 2010-10-20 上海市电力公司 高空作业车液压升降系统油电双动力驱动装置
CN104133391A (zh) * 2014-07-17 2014-11-05 中北大学 一种双电机加载机构电动负载模拟器
CN206139641U (zh) * 2016-10-14 2017-05-03 黄冈三德板业有限公司 带钢卷取机
CN111221367A (zh) * 2020-03-12 2020-06-02 合肥工业大学 一种联合电机与可控离合器的多功能执行器的控制方法
CN113915246A (zh) * 2021-10-18 2022-01-11 江苏新能源汽车研究院有限公司 一种双离合器扭矩交换控制系统及控制方法
CN114427579A (zh) * 2022-03-15 2022-05-03 佛山市增广智能科技有限公司 动力传动机构及机械设备
CN115647072A (zh) * 2022-10-28 2023-01-31 中色科技股份有限公司 一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法
CN115647049A (zh) * 2022-10-28 2023-01-31 中色科技股份有限公司 一种精密铜板带轧制生产线、生产工艺及张力控制方法
CN218611036U (zh) * 2022-10-28 2023-03-14 中色科技股份有限公司 一种精确控制卷轴扭矩的卷取机结构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5298711B2 (ja) * 2008-09-04 2013-09-25 Ｊｆｅスチール株式会社 金属帯巻取り張力の低下検出方法および装置
CN103076743B (zh) * 2012-12-28 2017-05-24 西安建筑科技大学 卷取机的张力模糊pid控制方法
CN105539118A (zh) * 2015-12-16 2016-05-04 天津市松正电动汽车技术股份有限公司 一种混合动力车辆驱动装置
JP7131532B2 (ja) * 2019-11-20 2022-09-06 Ｊｆｅスチール株式会社 巻取制御装置、コイラー、巻取制御方法および熱間圧延金属帯の製造方法
CN113477746A (zh) * 2021-07-20 2021-10-08 武汉乾冶众联科技有限公司 一种双电机并联驱动装置及实芯张力卷取机

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55142452A (en) * 1979-04-19 1980-11-07 Matsushita Electric Ind Co Ltd Tape tension controlling unit for magnetic recording and reproducing unit
JPH05204467A (ja) * 1992-01-30 1993-08-13 Toshiba Corp リールの張力制御方法およびその制御装置
CN101863437A (zh) * 2010-06-18 2010-10-20 上海市电力公司 高空作业车液压升降系统油电双动力驱动装置
CN104133391A (zh) * 2014-07-17 2014-11-05 中北大学 一种双电机加载机构电动负载模拟器
CN206139641U (zh) * 2016-10-14 2017-05-03 黄冈三德板业有限公司 带钢卷取机
CN111221367A (zh) * 2020-03-12 2020-06-02 合肥工业大学 一种联合电机与可控离合器的多功能执行器的控制方法
CN113915246A (zh) * 2021-10-18 2022-01-11 江苏新能源汽车研究院有限公司 一种双离合器扭矩交换控制系统及控制方法
CN114427579A (zh) * 2022-03-15 2022-05-03 佛山市增广智能科技有限公司 动力传动机构及机械设备
CN115647072A (zh) * 2022-10-28 2023-01-31 中色科技股份有限公司 一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法
CN115647049A (zh) * 2022-10-28 2023-01-31 中色科技股份有限公司 一种精密铜板带轧制生产线、生产工艺及张力控制方法
CN218611036U (zh) * 2022-10-28 2023-03-14 中色科技股份有限公司 一种精确控制卷轴扭矩的卷取机结构

Also Published As

Publication number Publication date
DE112023000139T5 (de) 2024-08-22
CN115647072A (zh) 2023-01-31
CN115647072B (zh) 2024-05-28

Similar Documents

Publication Publication Date Title
CN103076743B (zh) 卷取机的张力模糊pid控制方法
WO2024088405A1 (zh) 一种精确控制卷轴扭矩的卷取机结构及卷轴扭矩控制方法
CN110788143B (zh) 一种轧机加减速阶段的厚度补偿方法
AU649813B2 (en) Method and apparatus for continuously hot rolling of ferrous long products
CN106583452B (zh) 一种传动方式可选的金属极薄带轧机及其轧制方法
US4745556A (en) Rolling mill management system
JP7368497B2 (ja) 極薄鋼帯コイリング張力制御法
CN111046528B (zh) 一种基于滤波的冷轧机直接张力优化控制方法
CN218611036U (zh) 一种精确控制卷轴扭矩的卷取机结构
US6116068A (en) Method of regulating the drive of a drawing machine, and drawing device
CN105642670B (zh) 一种高硅钢的卷取式温轧装置及其方法
CN102029295B (zh) 用于冷轧处理线带钢张力控制的速度自动修正方法
CN203006584U (zh) 一种板带处理线张紧辊控制装置
CN106391723A (zh) 冷连轧机双卷取速度切换及建张方法
CN104801567B (zh) 一种大规格范围和产能的连续处理线张力控制方法
CN115647049A (zh) 一种精密铜板带轧制生产线、生产工艺及张力控制方法
US2479353A (en) Device for reducing thickness of thin sheet material
CN112893482A (zh) 高强钢卷取张力控制方法、装置、设备及存储介质
CN106862282B (zh) 一种高速轧机电气传动控制系统
EP0193155B2 (en) Continuous multi-stand mill plant for rolling steel plates
US3641797A (en) Stretcher leveling system
CN101574703A (zh) 一种筒节轧制工艺及其轧制设备
Yang et al. Application of adaptable neural networks for rolling force set-up in optimization of rolling schedules
CN115971250A (zh) 一种可逆式精密铜箔轧制生产线、生产工艺及张力控制方法
RU2809885C1 (ru) Устройство для управления непрерывным станом холодной прокатки

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 112023000139

Country of ref document: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23881980

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2024541222

Country of ref document: JP