CN112626331B - Method for judging furnace roller slipping in continuous annealing furnace - Google Patents

Method for judging furnace roller slipping in continuous annealing furnace Download PDF

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CN112626331B
CN112626331B CN202011374951.7A CN202011374951A CN112626331B CN 112626331 B CN112626331 B CN 112626331B CN 202011374951 A CN202011374951 A CN 202011374951A CN 112626331 B CN112626331 B CN 112626331B
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furnace
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张飞
吕昕
李静
任晓怀
肖雄
张勇军
李由
高栋
章昕
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University of Science and Technology Beijing USTB
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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Abstract

The invention belongs to the field of metallurgical machinery, automation and steel production fault diagnosis, and particularly relates to a method for judging furnace roller slipping in a continuous annealing furnace. For a certain monitoring roller to be judged to slip in the continuous annealing furnace, calculating the critical condition of the slip of the monitoring roller and calculating the tangential force F provided by the torque of a motor of the monitoring rollert(ii) a If the tangential force F provided by the motor torque of the monitoring rollertIf the maximum tension difference which can be borne by the two ends of the furnace roller and corresponds to the critical condition of the slipping of the monitoring roller is larger than the maximum tension difference, the slipping phenomenon of the monitoring roller is judged; the method can realize real-time judgment of the slipping fault of the furnace roller in the continuous annealing furnace.

Description

Method for judging furnace roller slipping in continuous annealing furnace
Technical Field
The invention belongs to the field of fault diagnosis of metallurgical machinery, automation and steel production, and particularly relates to a method for judging the slipping of a furnace roller in a continuous annealing furnace, in particular to a method for judging the slipping of the furnace roller in the continuous annealing furnace by establishing a mechanism model through combination of mechanical conditions, process parameters and equipment parameters.
Background
Under the normal production state, the running speed of the strip steel in the continuous annealing furnace is strictly consistent with the linear speed of the furnace roller, if the running speed of the strip steel is inconsistent with the linear speed of the furnace roller, the strip steel in the continuous annealing furnace moves relatively, and the phenomenon that the strip steel slips is caused. The furnace roller of the whole furnace zone is divided into a plurality of tension sections according to the production process requirements, and the tension control requirements of each tension section are different according to the process requirements. The tension of each tension section is controlled within the range specified by the production process by adjusting the current of each driving roller driving motor to adjust the torque. However, the furnace roller may slip due to the material feeding specification of the annealing furnace, the roller surface roughness of the furnace roller, the running state of the motor and the like. The phenomenon of skidding not only can cause belted steel surface quality flaw, also can aggravate production abnormalities such as belted steel off tracking, can cause the stove to break the area even when serious, also can threaten production facility's safety simultaneously, aggravates the surface wear of roller self for roller roughness obviously descends in the short-term, reduces roll change cycle.
In the actual production process, the real-time monitoring and prediction of the slip phenomenon are very difficult at ordinary times. This is because on the one hand slipping tends to occur instantaneously and on the other hand it is impractical to monitor the operating conditions of each furnace roller by human labor, due to the large number of furnace rollers in the furnace zone and the closed furnace zone. The existing method for judging the slipping in the continuous annealing furnace is mainly used for observing whether scratches appear on the surface of the strip steel through a subsequent strip steel surface detection process, the method is easy to miss detection, is difficult to judge the slipping position, and has limited reference significance for adjustment of later process setting and equipment maintenance.
Therefore, how to reduce the difficulty of determining the continuous slip fault and determine the position of the slip fault is an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the fact that no effective method for judging the slipping fault in the continuous annealing process on line exists currently, the invention aims to provide a method for judging the slipping fault of a furnace roller in a continuous annealing furnace based on a tension mechanism model. The method can reduce the judgment difficulty of the slipping fault of the continuous annealing furnace and realize the fault judgment under the condition of no shutdown on line.
In order to achieve the above object, the present invention provides the following technical solutions.
The method for judging furnace roller slipping in the continuous annealing furnace is characterized in that for a certain monitoring roller to be judged to slip in the continuous annealing furnace, the critical condition of the slip of the monitoring roller is calculated, and the tangential force F provided by the torque of a motor of the monitoring roller is calculatedt(ii) a If the tangential force F provided by the motor torque of the monitoring rollertIf the maximum tension difference which can be borne by the two ends of the furnace roller and corresponds to the critical condition of the slipping of the monitoring roller is larger than the maximum tension difference, the slipping phenomenon of the monitoring roller is judged; the method can realize real-time judgment of the slipping fault of the furnace roller in the continuous annealing furnace.
Further, the monitoring of the tangential force F provided by the roller motor torquetThe calculation of (2) is specifically as follows:
acquiring the real-time motor torque T of the monitoring roller through a primary PLC (programmable logic controller), and according to the relation between the torque and the force
Figure BDA0002807940340000021
Calculating to obtain a tangential force Ft(ii) a And d is the roll diameter of the monitoring roll, i is the gear transmission ratio corresponding to the monitoring roll, and eta is the mechanical efficiency of the motor of the monitoring roll furnace roll.
Further, calculating the critical condition of the monitoring roll slipping through the real-time tension condition of the monitoring roll, wherein the real-time tension condition comprises the strip steel tension F of the loose edge of the monitoring roll0And monitoring roller equipment parameters, wherein the monitoring roller equipment parameters comprise a friction coefficient mu of a contact surface of the furnace roller and the strip steel and a wrap angle alpha of the furnace roller and the strip steel;
the maximum tension difference delta F borne by the two ends of the furnace roller in the critical state of roller slip monitoring is as follows:
ΔF＝F1-F0＝F0·(eμα-1)；
wherein, F1According to the Euler formula of the flexible body, for monitoring the tension of the tight edge of the rollF1＝F0·eμαWherein F is0The tension of the strip steel at the edge loosening of the roller is monitored.
Further, the method for calculating the strip steel tension of the edge loosening of the furnace roller comprises the following steps:
acquiring section tension data of each tension section acquired by a first-level PLC (programmable logic controller), namely reading of a tension meter of each tension section, and acquiring an actual value F of tension of an adjacent sectionadjAnd the actual value F of the tension of the sectionselfObtaining the tension increment load delta F of the sections＝|Fself-Fadj|；
Then calculating the tension increment delta F of each furnace roller through the tension increment load distribution coefficient K of each furnace roller in the sectionRThe strip steel tension of the edge loosening of each furnace roller can be obtained by adding the edge loosening tension of the previous roller to the tension increment of the previous roller one by one along the tension increasing direction. It is noted here that the tension is generally lower in the higher temperature tension section of the process. According to the production direction of the strip steel, namely from a preheating section to a final cooling section, the tension in the heating process (from the preheating section to a soaking section) is gradually reduced, the loose edges of all rollers in the section are close to the outlet side of the section, and section tensiometers are all arranged at the outlet position of the section; the tension of most cooling processes (an overaging section, a final cooling section and the like) is gradually increased, the loose edges are close to the inlet side of the section, the section tensiometers are all arranged at the inlet positions of the section, the section tensiometers of a slow cooling section and a fast cooling section are arranged in the middle of the tension section, taking the overaging 1 section as an example, the loose edge tension of a first roller in the section is the reading of the section inlet position tensiometer, and the loose edge tension of a second roller is the reading of the section inlet tensiometer plus the tension increment of the first roller, so that the gradual recursion is realized.
Further, the method for calculating the tension increment load distribution coefficient K specifically includes:
the tension increment load distribution coefficient K is a distribution rule of tension increment set according to the tension building capability of each roller in the tension section; proportionally distributing the tension increment load distribution coefficient K to each roller in the section to jointly establish tension increment in the section, wherein the proportion of the tension increment distributed by each roller is the proportion of the roller distribution coefficient to the sum of all the roller distribution coefficients in the section; wherein the tension building capability of the roller is influenced by the position and the wrap angle of the rollerInfluence, the tension delta load distribution coefficient K being the torque distribution coefficient KtqAnd the sum of the distribution coefficients of different wrap angles alpha;
considering the influence of the gravity of the strip steel, different torque distribution coefficients are adopted for the furnace top roller and the furnace bottom roller, the torque distribution coefficient of the furnace top roller is 1.0, and the torque distribution coefficient of the furnace bottom roller is 0.7;
when the wrap angle between the strip steel and the furnace roller is 180 degrees, the wrap angle distribution coefficient of 1.0 is adopted, and when the wrap angle between the strip steel and the furnace roller is 90 degrees, the wrap angle distribution coefficient of 0.5 is adopted.
Further, the verification of the monitoring roller equipment parameters is specifically as follows: the friction coefficient mu of the contact surface of the furnace roller and the strip steel is measured by an experimental method, and the wrap angle alpha of the furnace roller and the strip steel is directly obtained through the arrangement condition of the furnace roller of the continuous annealing furnace.
Compared with the prior art, the method for determining the slipping of the furnace roller of the continuous annealing furnace through strip steel surface detection has the main advantages that:
(1) the invention provides an online real-time furnace roller slippage judgment method without relying on excessive manpower. When the strip steel is judged to slip, the slipping judgment of the furnace roller in the furnace is automatically finished mainly by collecting field section tension detection data, furnace roller motor torque signals and equipment parameters and combining with the tension increment load distribution specification of the furnace roller.
(2) The method of the invention has real-time operation. The method for judging the slip through the meter detection in the prior art has hysteresis, the judgment of the existing method is carried out after the strip steel passes through the continuous annealing process, the slip fault is difficult to find in time so as to take corresponding measures, and the condition of missed detection and missed judgment is easy to occur; the method provided by the invention can judge the slipping phenomenon in real time in the continuous annealing production process, can find the slipping fault in time and cannot generate the phenomenon of missing report.
(3) The tension, transmission signals and equipment parameters collected in the method are easy to obtain and measure. The mainstream cold rolling continuous annealing unit in China adopts a section tension control mode, and meanwhile, only torque signals of a transmission motor of the furnace roller in a section without a tensiometer are needed, the data are easy to obtain, and equipment conditions such as friction coefficient and strip steel wrap angle are also easy to verify through experiments and arrangement conditions of the furnace roller in the furnace.
Comprehensively, the method for judging the slipping fault of the furnace roller in the continuous annealing furnace based on the tension mechanism model provided by the invention can realize the online slipping judgment of the furnace roller by only acquiring the tension of the furnace inner section, the torque signal of the furnace roller transmission motor and the equipment conditions without adding new equipment, and meets the requirements of automation, real-time performance and easy realization.
Description of the drawings:
FIG. 1 is a schematic view of the stress condition of a system consisting of a furnace roller (top roller) and strip steel in the embodiment of the invention; wherein, F0The loose edge tension of the band steel wrapped on the furnace roller; f1The tension of the tight edge of the furnace roller wrapped by the strip steel; f is the friction force of the contact surface of the furnace roller and the strip steel; alpha is the wrap angle of the strip steel and the furnace roller.
FIG. 2 is a schematic diagram showing the distribution of process units and tensiometers in a continuous annealing unit according to an embodiment of the present invention.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
In the embodiment of the invention, as shown in fig. 2, according to the description of the annealing cycle process, the cold-rolled strip steel is subjected to the processes of heating, soaking, cooling and the like in the annealing furnace, and the processes must be executed according to a certain annealing process curve. Because the temperature influences the in-furnace tension process, the rollers in the furnace are further divided into different tension sections, and the strip steel is welded and wound on each furnace roller in the furnace for production. Taking the overaging stage 1 as an example, the top roll of the stage has 7 rolls, the bottom roll of the stage has 8 rolls, wherein 2 rolls with 90-degree wrap angle are used, and the other 13 rolls have 180-degree wrap angle.
Because the tension requirements of the strip steel under different temperature conditions are different, 10 tension sections are divided in the furnace, and one tension section is arranged between two adjacent tensiometers and comprises a preheating section, a heating 1 section, a heating 2 section, a heating 3 section, a soaking section, a slow cooling section, a fast cooling section, an overaging 1 section, an overaging 2 section, an overaging 3 section and a final cooling section; wherein, according to the situation of dividing the tension section by the tensiometer, the preheating section and the heating section 1 are a tension section (see fig. 2), and in the following, taking the second bottom roller of the overaging section 1 as an example, the specific implementation scheme is as follows:
1) verifying the friction coefficient mu and the wrap angle alpha (see figure 1) with the strip steel and calculating the tension increment load distribution coefficient K:
the friction coefficient mu between the strip steel and the furnace roller can be measured through experiments, and can also be taken according to the following value range, wherein the value can be taken from 0.1 to 0.15 when the steel roller is adopted, the value can be taken from 0.18 to 0.25 when the rubber-lined roller is adopted, and the friction coefficient is reduced when oil exists on the surface of the strip steel; secondly, a furnace bottom roller with a wrap angle of 90 degrees and a furnace top roller with a wrap angle of 180 degrees are arranged in front of the monitoring roller (the second bottom roller at the overaging 1 section) in combination with the arrangement condition of the furnace rollers; ③ 7 furnace top rollers and 8 furnace bottom rollers (see figure 2) of the overaging 1 section of the continuous annealing unit, wherein, 2 rollers with 90-degree wrap angles exist, the rest 13 rollers have 180-degree wrap angles, and the total distribution coefficient of the tension section (the sum of the total distribution coefficient of all the furnace rollers in the section is K)OAS17 × 1.0+8 × 0.7+13 × 1.0+2 × 0.5 ═ 26.6; the sum of the total distribution coefficients of all the rollers in the section is used as a denominator to calculate the proportion of the tension increment distributed to each roller to the tension increment of the section;
when the slack side tension of the monitoring roller is calculated, the slack side tension of the monitoring roller is calculated through the distribution coefficient of the roller before the monitoring roller, in the embodiment, a bottom roller with a wrap angle of 90 degrees and a top roller with a wrap angle of 180 degrees are arranged before the monitoring roller at the overaging 1 section, and the tension increment load distribution coefficient of the 90-degree bottom roller is as follows: k10.7+ 0.5-1.2, the productThe tension increment load distribution coefficient of the 180-degree top roll is as follows: k2＝1.0+1.0＝2.0。
2) Calculating the loose edge tension of the furnace roller: the tension sections adjacent to the overaging 1 section are a fast cooling section and an overaging 2 section, according to the requirement of a continuous annealing process, the temperature of the fast cooling section is higher than that of the overaging 1 section, the direction of the increase of the internal tension of the overaging 1 section is gradually increased from one side close to the fast cooling section to one side close to the overaging 2 section, meanwhile, the tension of the overaging 1 section and the overaging 2 section is measured at the first furnace bottom roller in the sections (see figure 2), and the tension increment load of the overaging 1 section is the difference delta F between the tension of the overaging 2 section and the tension of the overaging 1 sectionOAS1＝FOAS2-FOAS1The tension increment provided by the bottom roller with 90-degree wrap angle in front of the monitoring roller (the second bottom roller in the overaging 1 stage) is as follows:
Figure BDA0002807940340000051
the top roll with a 180 degree wrap angle in front provides the tension increments:
Figure BDA0002807940340000052
according to the rule of increasing the tension, the slack side tension of the monitoring roller is as follows: f0＝FOAS1+0.045×ΔFOAS1+0.075×ΔFOAS1＝FOAS1+0.12×(FOAS2-FOAS1)＝0.88FOAS1+0.12FOAS2。
3) Calculating the critical condition of the furnace roller slip: according to the Euler formula of the flexible body, the maximum tension difference born by the two ends of the furnace roller in the slipping critical state is as follows: Δ F ═ F0·(eπμ-1)。
4) Calculating and monitoring roll tangential force Ft: the real-time motor torque T of the roller is acquired through a primary PLC (programmable logic controller), and the relationship between the torque and the force is adopted
Figure BDA0002807940340000061
Calculating to obtain a tangential force FtWherein d is the roll diameter of the monitoring roll, i is the gear transmission ratio, and η is the mechanical efficiency of the furnace roll motor.
3) Comparing the two furnace rollers under the current tension conditionMaximum tension difference delta F borne by the end and the tangential force F of the rollertIf tangential force FtAnd if the maximum tension difference delta F can be borne by the two ends of the furnace roller, the current monitoring roller is considered to have a slip fault, an alarm is output, the production speed of a continuous annealing production line is reduced, the tension of the strip steel is properly increased, meanwhile, the surface roughness and the surface quality of the monitoring roller are checked in a shutdown state, and the furnace roller with poor quality is replaced in time.
By adopting the furnace roller slipping judgment method designed by the invention, not only can the real-time detection of the slipping state of the furnace roller in the continuous annealing process be realized, and the corresponding measures can be taken in time to avoid larger production faults, but also the position of the furnace roller with the slipping fault can be accurately positioned, so that the equipment can be conveniently and timely inspected and maintained, and the normal and smooth production can be ensured. The invention provides a new method and thought for online real-time detection of the slipping fault of the furnace roller in the continuous annealing process, is convenient for system realization, and is beneficial to ensuring the efficient and stable operation of rolling production, particularly continuous annealing production.
The method provided by the invention establishes a mechanism model for judging furnace roller slipping according to a mechanical system consisting of the furnace roller and strip steel from the critical condition of furnace roller slipping and the contact surface tangential force provided by the current furnace roller transmission motor. The critical condition of furnace roller slipping is obtained by monitoring the loose edge tension of the strip steel on the roller, the friction coefficient of the contact surface and the wrap angle of the contact surface of the strip steel and the tension roller and calculating based on the Euler formula of the flexible body. When the slack side tension of the strip steel on the monitoring roller is calculated, the tension increment of the section is firstly calculated through the section tension monitoring values of the tension section where the monitoring roller is located and the adjacent tension section, then the tension increment of the strip steel on each furnace roller is obtained through the distribution coefficient of the tension increment on each furnace roller in the section, and the slack side tension of the strip steel on the monitoring roller can be obtained through recursion along the tension increasing direction. The tangential force of the contact surface provided by the furnace roller transmission motor can be obtained by conversion according to the relation between the output torque of the furnace roller transmission motor and the tangential force, and whether the current monitoring roller slips or not can be judged by comparing the output torque of the furnace roller transmission motor and the tangential force, so that the online judgment of the furnace roller slipping in the continuous annealing furnace is realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. The method for judging the furnace roller slipping in the continuous annealing furnace is characterized in that for a certain monitoring roller to be judged to slip in the continuous annealing furnace, the critical condition of the slip of the monitoring roller is calculated, and the tangential force F provided by the torque of a motor of the monitoring roller is calculatedt(ii) a If the tangential force F provided by the motor torque of the monitoring rollertIf the maximum tension difference which can be borne by the two ends of the furnace roller and corresponds to the critical condition of the slipping of the monitoring roller is larger than the maximum tension difference, the slipping phenomenon of the monitoring roller is judged; the method can realize real-time judgment of the slipping fault of the furnace roller in the continuous annealing furnace;
calculating the critical condition of the monitoring roller slip through the real-time tension condition of the monitoring roller, wherein the real-time tension condition comprises the strip steel tension F of the monitoring roller loose edge0And monitoring roller equipment parameters, wherein the monitoring roller equipment parameters comprise a friction coefficient mu of a contact surface of the furnace roller and the strip steel and a wrap angle alpha of the furnace roller and the strip steel;
the maximum tension difference delta F borne by the two ends of the furnace roller in the critical state of roller slip monitoring is as follows:
ΔF＝F1-F0＝F0·(eμα-1)；
wherein, F1According to the Euler formula F of the flexible body, for monitoring the edge tension of the roll1＝F0·eμαWherein F is0Monitoring the strip steel tension of the roller loose edge;
the method for calculating the strip steel tension of the furnace roller edge loosening comprises the following steps:
acquiring section tension data of each tension section acquired through a primary PLC (programmable logic controller), namely reading of a tensiometer of each tension section, and passing through an actual value F of tension of an adjacent sectionadjAnd the actual value F of the tension of the sectionselfObtaining the tension increment load delta F of the sections＝|Fself-Fadj|；
Then calculating the tension increment delta F of each furnace roller through the tension increment load distribution coefficient K of each furnace roller in the sectionRThe tension of the slack side strip steel of each furnace roller is obtained by adding the slack side tension of the previous roller to the tension increment of the previous roller one by one along the tension increasing direction;
the method for calculating the tension increment load distribution coefficient K specifically comprises the following steps:
the tension increment load distribution coefficient K is a distribution rule of tension increment set according to the tension building capability of each roller in the tension section; proportionally distributing the tension increment load distribution coefficient K to each roller in the section to jointly establish tension increment in the section, wherein the proportion of the tension increment distributed by each roller is the proportion of the roller distribution coefficient to the sum of all the roller distribution coefficients in the section; wherein the tension build-up capability of the roll is influenced by the furnace roll position and wrap angle, and the tension delta load distribution coefficient K is a torque distribution coefficient KtqAnd the sum of the distribution coefficients of different wrap angles alpha;
considering the influence of the gravity of the strip steel, different torque distribution coefficients are adopted for the furnace top roller and the furnace bottom roller, the torque distribution coefficient of the furnace top roller is 1.0, and the torque distribution coefficient of the furnace bottom roller is 0.7;
when the wrap angle between the strip steel and the furnace roller is 180 degrees, the wrap angle distribution coefficient of 1.0 is adopted, and when the wrap angle between the strip steel and the furnace roller is 90 degrees, the wrap angle distribution coefficient of 0.5 is adopted.
2. The method of claim 1, wherein the tangential force F provided by the torque of the roll motor is monitoredtThe calculation of (2) is specifically as follows:
acquiring the real-time motor torque T of the monitoring roller through a primary PLC (programmable logic controller), and according to the relation between the torque and the force
Figure FDA0003238078680000021
Calculating to obtain a tangential force Ft(ii) a And d is the roll diameter of the monitoring roll, i is the gear transmission ratio corresponding to the monitoring roll, and eta is the mechanical efficiency of the motor of the monitoring roll furnace roll.
3. The method for judging the furnace roller slipping in the continuous annealing furnace according to claim 1, wherein the verification of the monitoring roller equipment parameters is specifically as follows: the friction coefficient mu of the contact surface of the furnace roller and the strip steel is measured by an experimental method, and the wrap angle alpha of the furnace roller and the strip steel is directly obtained through the arrangement condition of the furnace roller of the continuous annealing furnace.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036035A2 (en) * 1979-10-31 1981-09-23 Kawasaki Steel Corporation Method and apparatus for controlling tensions in a continuous steelstrip annealing furnace
JPH049432A (en) * 1990-04-26 1992-01-14 Nkk Corp Catenary-type continuous furnace for strip
CN102131596A (en) * 2008-08-27 2011-07-20 西门子公司 Method for controlling and/or regulating slipping motion of roller relative to strip, controller and/or regulator, machine-readable program code, storage medium and industrial plant
CN104001733A (en) * 2014-03-11 2014-08-27 广西柳州银海铝业股份有限公司 Control method for preventing tension measuring roller from slipping relative to continuous rolling strip
CN107952799A (en) * 2017-11-07 2018-04-24 武汉科技大学 A kind of control method for reducing tension roll assembly skidding and influencing
CN110064662A (en) * 2019-05-05 2019-07-30 北京科技大学设计研究院有限公司 A kind of control method for avoiding single stand cold mill belt steel flating machine S roller from skidding
CN111250550A (en) * 2020-01-15 2020-06-09 首钢京唐钢铁联合有限责任公司 Control method and control system of tension roller set

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036035A2 (en) * 1979-10-31 1981-09-23 Kawasaki Steel Corporation Method and apparatus for controlling tensions in a continuous steelstrip annealing furnace
JPH049432A (en) * 1990-04-26 1992-01-14 Nkk Corp Catenary-type continuous furnace for strip
CN102131596A (en) * 2008-08-27 2011-07-20 西门子公司 Method for controlling and/or regulating slipping motion of roller relative to strip, controller and/or regulator, machine-readable program code, storage medium and industrial plant
CN104001733A (en) * 2014-03-11 2014-08-27 广西柳州银海铝业股份有限公司 Control method for preventing tension measuring roller from slipping relative to continuous rolling strip
CN107952799A (en) * 2017-11-07 2018-04-24 武汉科技大学 A kind of control method for reducing tension roll assembly skidding and influencing
CN110064662A (en) * 2019-05-05 2019-07-30 北京科技大学设计研究院有限公司 A kind of control method for avoiding single stand cold mill belt steel flating machine S roller from skidding
CN111250550A (en) * 2020-01-15 2020-06-09 首钢京唐钢铁联合有限责任公司 Control method and control system of tension roller set

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