CN112845608B - Method for judging wear degree of drying roller in acid washing - Google Patents
Method for judging wear degree of drying roller in acid washing Download PDFInfo
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- CN112845608B CN112845608B CN202011388542.2A CN202011388542A CN112845608B CN 112845608 B CN112845608 B CN 112845608B CN 202011388542 A CN202011388542 A CN 202011388542A CN 112845608 B CN112845608 B CN 112845608B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
Abstract
The invention relates to a method for judging the wear degree of a drying roller in acid washing, belonging to the technical field of acid washing of cold-rolled strip steel. The technical scheme of the invention is as follows: the established mathematical model of the wear time of the drying roll is utilized in a secondary system, and the length, the running speed, the position load coefficient and the mark load coefficient of the current roll are automatically selected and produced; the abrasion time of the drying roller at different positions is automatically calculated, and when the abrasion time of the drying roller reaches a specified value, the abrasion degree of the drying roller reaches an optimal state, and periodic replacement can be carried out. The invention has the beneficial effects that: the method can effectively realize the accurate use tracking of the wringing roller, improve the accurate control capability of the abrasion degree of the wringing roller, reduce the accident rate of the wringing roller by more than 90 percent, play a great role in the pickling quality and stable production of products, and better solve the accurate control problem of the abrasion degree of the wringing roller.
Description
Technical Field
The invention relates to a method for judging the wear degree of a drying roller in acid washing, belonging to the technical field of acid washing of cold-rolled strip steel.
Background
The acid rolling unit is a pickling and cold rolling combined unit, pickling is a first treatment process of cold rolling, the main function of the pickling and cold rolling combined unit is to remove an iron oxide layer adhered to the surface of steel and prepare for subsequent processing, and wringing rollers are applied to a pickling section and a rinsing section and are used for wringing the surface of strip steel to ensure the quality of the surface of the strip steel. For example, 12 pairs of squeezing roller systems of a certain pickling line set are provided, the positions of the squeezing roller systems are 1#, 2#, 3#. 11#, and 12# respectively, wherein the 1-4# squeezing roller is applied to a pickling section, the 5-12# squeezing roller is applied to a rinsing section, the roller systems are different in use working condition and different in abrasion condition, no brand band steel is used in the production of the unit, and the abrasion condition of the squeezing roller is not easy to judge under different running speeds. At present, the replacing period of the wringing roller is periodically replaced according to 'day'. For example, the replacement frequency of the 1-2# position wringing roller is 3 months, the replacement frequency of the 3-4# position wringing roller is 45 days, the replacement frequency of the 5-6# position wringing roller is 45 days, the replacement frequency of the 7-10# position wringing roller is 15 days, and the replacement frequency of the 11-12# position wringing roller is 7-10 days. The replacement period of the drying roller does not consider the downtime, the production grade steel and the production running speed in the replacement period, the drying roller is stopped in the period due to maintenance or other reasons, the drying roller is in a stop state, the iron oxide scale layers on the surfaces of the strip steels of different grades are the same, the abrasion conditions of the roughness of the surface of the strip steel to the drying roller are different, and the abrasion degrees of the strip steel to the roller system are different due to the different running speeds of the strip steel in the production process. If the drying roller is slightly worn and the continuous use time is uncontrollable or the drying roller is excessively worn according to the replacement period, the machine has to be stopped for replacement in advance, and the stable operation of the production rhythm is greatly influenced.
Disclosure of Invention
The invention aims to provide a method for judging the abrasion degree of a drying roller in acid washing, which determines the abrasion rule of a roller system by establishing a mathematical model of the abrasion time of the drying roller in acid washing and analyzing the grade steel of a produced steel coil, the length and the position load of the steel coil and the running speed of steel in production, establishes a model and maintains a two-stage control system of a unit, thereby realizing the accurate use tracking of the drying roller, ensuring the acid washing effect, further ensuring the stability of the production rhythm and effectively solving the problems in the background technology.
The technical scheme of the invention is as follows: a method for judging the abrasion degree of a squeezing roller in acid cleaning comprises the following steps:
step one, establishing a mathematical model of the wear time of a drying roll in acid washing
In the formula (1), T is the abrasion time of the drying roller, L is the length of a steel coil, V is the running speed of the strip steel, K1 is a brand steel coefficient, and K2 is a position load coefficient;
step two, maintaining a production secondary control system by using the mathematical model established in the step one, and automatically selecting the length for producing the current coil according to the length L of the steel coil of the current production coil; the running speed V of the strip steel automatically selects the running speed for producing the current coil; the grade steel type coefficient K1 automatically selects the grade steel type coefficient for producing the current coil; the position load coefficient K2 selects different coefficients according to positions;
And step three, calculating the abrasion time of the drying roller at different positions of 1-12# according to the established mathematical model of the abrasion time of the drying roller, and when the abrasion time of the drying roller at the corresponding position reaches 15-18 days, ensuring that the abrasion degree of the drying roller reaches the optimal state and arranging periodic replacement.
In the second step, the coefficient K1 of the grade steel is selected, and when the grade steel is stamping steel, the coefficient K1 of the grade steel is 1.1; when the steel grade is deep drawing steel, the coefficient K1 of the grade steel is 1.3; when the steel grade is ultra-deep drawing steel, the coefficient K1 of the grade steel is 1.4; when the steel grade is high-strength IF steel, the coefficient K1 of the grade steel grade is 1.4; when the steel grade is low-alloy high-strength steel, the coefficient K1 of the grade steel grade is 1.1; when the steel grade is barbecue hardening steel, the coefficient K1 of the grade steel grade is 1.2; when the steel grade is dual-phase steel, the coefficient K1 of the grade steel grade is 1.5; when the steel grade is martensite steel, the coefficient K1 of the grade steel grade is 1.3; when the steel grade is the composite steel, the coefficient K1 of the grade steel grade is 1.4.
In the second step, the position load coefficient K2 is selected, the No. 1 position wringing roller is adopted, and the position load coefficient K2 is 0.9; the No. 2 position wringing roller has a position load coefficient K2 of 0.95; the No. 3 position wringing roller has a position load coefficient K2 of 1.0; the No. 4 position wringing roller has a position load coefficient K2 of 1.1; the No. 5 position wringing roller has a position load coefficient K2 of 1.4; the No. 6 position wringing roller has a position load coefficient K2 of 1.3; the No. 7 position wringing roller has a position load coefficient K2 of 1.1; the No. 8 position wringing roller has a position load coefficient K2 of 1.1; the No. 9 position wringing roller has a position load coefficient K2 of 1.1; the No. 10 position wringing roller has a position load coefficient K2 of 1.2; the No. 11 position wringing roller has a position load coefficient K2 of 1.3; 12# position wringing roller, position load factor K2 was 1.5.
The beneficial effects of the invention are: by establishing a mathematical model of the wear time of the wringing roller in the pickling process, analyzing the grade of steel, the length of the steel coil, the position load of the produced steel coil and the running speed of steel in the production, determining the wear rule of the roller system, establishing the model, and maintaining the model in a two-stage control system of a unit, the accurate use tracking of the wringing roller is realized, the pickling effect is ensured, and the stability of the production rhythm is further ensured.
Drawings
FIG. 1 is a schematic view of a wringer roll of the present invention in use;
in the figure: a wringing roller 1 and a running strip steel 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A method for judging the abrasion degree of a squeezing roller in acid cleaning comprises the following steps:
Step one, establishing a mathematical model of the wear time of a drying roll in acid washing
In the formula (1), T is the abrasion time of the drying roller, L is the length of a steel coil, V is the running speed of the strip steel, K1 is a brand steel coefficient, and K2 is a position load coefficient;
step two, maintaining a production secondary control system by using the mathematical model established in the step one, and automatically selecting the length of the produced current coil according to the length L of the current coil; the running speed V of the strip steel automatically selects the running speed of the current coil; the grade steel type coefficient K1 automatically selects the grade steel type coefficient for producing the current coil; the position load coefficient K2 selects different coefficients according to positions;
and step three, calculating the abrasion time of the drying roller at different positions of 1-12# according to the established mathematical model of the abrasion time of the drying roller, and when the abrasion time of the drying roller at the corresponding position reaches 15-18 days, ensuring that the abrasion degree of the drying roller reaches the optimal state and arranging periodic replacement.
In the second step, the coefficient K1 of the grade steel is selected, and when the grade steel is stamping steel, the coefficient K1 of the grade steel is 1.1; when the steel grade is deep drawing steel, the coefficient K1 of the grade steel grade is 1.3; when the steel grade is ultra-deep drawing steel, the coefficient K1 of the grade steel grade is 1.4; when the steel grade is high-strength IF steel, the coefficient K1 of the grade steel grade is 1.4; when the steel grade is low-alloy high-strength steel, the coefficient K1 of the grade steel grade is 1.1; when the steel grade is barbecue hardening steel, the coefficient K1 of the grade steel grade is 1.2; when the steel grade is dual-phase steel, the coefficient K1 of the grade steel grade is 1.5; when the steel grade is martensite steel, the coefficient K1 of the grade steel is 1.3; when the steel grade is the composite steel, the coefficient K1 of the grade steel grade is 1.4.
In the second step, the position load coefficient K2 is selected, the 1# position wringing roller is used, and the position load coefficient K2 is 0.9; the 2# position wringing roller has a position load coefficient K2 of 0.95; 3# position wringing roller, position load coefficient K2 is 1.0; the No. 4 position wringing roller has a position load coefficient K2 of 1.1; the No. 5 position wringing roller has a position load coefficient K2 of 1.4; the No. 6 position wringing roller has a position load coefficient K2 of 1.3; the No. 7 position wringing roller has a position load coefficient K2 of 1.1; the No. 8 position wringing roller has a position load coefficient K2 of 1.1; the No. 9 position wringing roller has a position load coefficient K2 of 1.1; the No. 10 position wringing roller has a position load coefficient K2 of 1.2; the No. 11 position wringing roller has a position load coefficient K2 of 1.3; 12# position wringing roller, position load factor K2 was 1.5.
In practical application, a mathematical model of the wear time of the drying roller is established in a control secondary system, and the wear time of the drying roller is calculated by automatically calling data according to the length L (unit: m) of a steel coil, the running speed V (unit: m/min) of strip steel, the position load coefficient K1 and the grade steel coefficient K2 as follows:
wherein: t is the crushing time of the drying roller,
l is the length of the steel coil,
v is the running speed of the strip steel,
k1 is the index of grade steel,
K2 is the position load factor.
In the production process, the abrasion time of the drying roller at the 1# position is automatically selected according to the current production roll and the mathematical model of the abrasion time of the drying roller, the length L of the current roll to be produced is automatically selected, the running speed V of the current roll to be produced is automatically selected, the grade steel coefficient K1 of the current roll to be produced is automatically selected, the load coefficient K2 of the 1# position is automatically selected, the abrasion time T1 of the drying roller at the 1# position can be automatically calculated, when the T1 reaches 15-18 days, the abrasion degree of the drying roller reaches the optimal state, and periodic replacement can be arranged.
In the production process, the abrasion time of the drying roller at the 2# position is automatically selected according to the current production roll and the mathematical model of the abrasion time of the drying roller, the length L of the current roll to be produced is automatically selected, the running speed V of the current roll to be produced is automatically selected, the grade steel coefficient K1 of the current roll to be produced is automatically selected, the load coefficient K2 of the 1# position is automatically selected, the abrasion time T2 of the drying roller at the 1# position can be automatically calculated, when the T2 reaches 15-18 days, the abrasion degree of the drying roller reaches the optimal state, and periodic replacement can be arranged.
By analogy, in the production process, the abrasion time of the drying roller at the 3-12# position is automatically selected according to the current production roll and the mathematical model of the abrasion time of the drying roller, the length L of the current production roll is automatically selected, the running speed V of the current production roll is automatically selected, the steel grade coefficient K1 of the current production roll is automatically selected, the load coefficient K2 of the 1# position is automatically selected, and the abrasion time T3-T12 of the drying roller at the 1# position can be automatically calculated. When T3-T12 reaches 15-18 days, the abrasion degree of the wringing roller reaches the optimal state, and periodic replacement can be scheduled.
The invention is further illustrated by the following examples:
example 1: in the production of coil number 20IA15542200 and the brand HC210IF (high-strength IF steel), the length of a steel coil is 578m, the average running speed of strip steel is 180m/min, and the calculation is as follows through the established mathematical model of the abrasion time of the wringing roller:
in the production process, the drying roller abrasion time at the 1# position is automatically selected according to the current production roll and a mathematical model of the drying roller abrasion time, the length L of the current roll to be produced is automatically selected, the running speed V of the current roll to be produced is automatically selected, the grade steel coefficient K1 of the current roll to be produced is automatically selected, the 1# position load coefficient K2 is automatically selected, the drying roller abrasion time T1 at the 1# position can be automatically calculated,
when the T1 accumulation reaches 15-18 days, the abrasion degree of the drying roller reaches the optimum state, and periodic replacement can be scheduled.
In the production process, the abrasion time of the wringing roller at the 2# position is automatically selected according to the current production roll and the mathematical model of the abrasion time of the wringing roller, the length L of the current production roll is automatically selected, the running speed V of the current production roll is automatically selected, the grade steel coefficient K1 of the current production roll is automatically selected, the load coefficient K2 of the 1# position is automatically selected, and the abrasion time T2 of the wringing roller at the 1# position can be automatically calculated,
When the T2 accumulation reaches 15-18 days, the abrasion degree of the drying roller reaches the optimum state, and periodic replacement can be scheduled.
By analogy, in the production process, the abrasion time of the drying roller at the 3-12# position is automatically selected according to the current production roll and the mathematical model of the abrasion time of the drying roller, the length L of the current production roll is automatically selected, the running speed V of the current production roll is automatically selected, the steel grade coefficient K1 of the current production roll is automatically selected, the load coefficient K2 of the 1# position is automatically selected, and the abrasion time T3-T12 of the drying roller at the 1# position can be automatically calculated.
When the T3-T12 accumulation reaches 15-18 days, the abrasion degree of the drying roller reaches the optimal state, and periodic replacement can be scheduled.
The condition tracking and real-time monitoring of the drying roller are realized through the established mathematical model of the drying roller abrasion time, and the method plays a great role in the product pickling quality and stable production.
Example 2: in the production of coil number 20IA14568800, designation DC03 (deep drawing steel), the length of the steel coil is 547m, the average running speed of the strip steel is 150m/min, and the wear time mathematical model of the wringing roller is calculated as follows:
in the production process, the drying roller abrasion time at the 1# position is automatically selected according to the current production roll and a mathematical model of the drying roller abrasion time, the length L of the current roll to be produced is automatically selected, the running speed V of the current roll to be produced is automatically selected, the grade steel coefficient K1 of the current roll to be produced is automatically selected, the 1# position load coefficient K2 is automatically selected, the drying roller abrasion time T1 at the 1# position can be automatically calculated,
When the T1 accumulation reaches 15-18 days, the abrasion degree of the drying roller reaches the optimum state, and periodic replacement can be scheduled.
In the production process, the drying roller abrasion time at the 2# position can be automatically calculated by automatically selecting the length L of the current roll according to the current production roll and a mathematical model of the drying roller abrasion time, automatically selecting the running speed V of the current roll, automatically selecting the steel grade coefficient K1 of the current roll, automatically selecting the load coefficient K2 at the 1# position, and automatically calculating the drying roller abrasion time T2 at the 1# position,
when the T2 accumulation reaches 15-18 days, the abrasion degree of the drying roller reaches the optimum state, and periodic replacement can be scheduled.
By analogy, in the production process, the abrasion time of the drying roller at the 3-12# position is automatically selected according to the current production roll and the mathematical model of the abrasion time of the drying roller, the length L of the current production roll is automatically selected, the running speed V of the current production roll is automatically selected, the grade steel type coefficient K1 of the current production roll is automatically selected, the 1# position load coefficient K2 is automatically selected, and the abrasion time T3-T12 of the drying roller at the 1# position can be automatically calculated.
When the accumulation of T3-T12 reaches 15-18 days, the abrasion degree of the drying roller reaches the optimal state, periodic replacement can be arranged, and the state tracking and real-time monitoring of the drying roller are realized.
Example 3: in the production of coil number 20IC00894900 and the brand HC500/780DP (dual-phase steel), the length of a steel coil is 1267m, the average running speed of strip steel is 160m/min, and the calculation is as follows through the established mathematical model of the abrasion time of the wringing roller:
in the production process, the drying roller abrasion time at the 1# position is automatically selected according to the current production roll and a mathematical model of the drying roller abrasion time, the length L of the current roll to be produced is automatically selected, the running speed V of the current roll to be produced is automatically selected, the grade steel coefficient K1 of the current roll to be produced is automatically selected, the 1# position load coefficient K2 is automatically selected, the drying roller abrasion time T1 at the 1# position can be automatically calculated,
when the T1 accumulation reaches 15-18 days, the abrasion degree of the drying roller reaches the optimum state, and periodic replacement can be scheduled.
In the production process, the abrasion time of the wringing roller at the 2# position is automatically selected according to the current production roll and the mathematical model of the abrasion time of the wringing roller, the length L of the current production roll is automatically selected, the running speed V of the current production roll is automatically selected, the grade steel coefficient K1 of the current production roll is automatically selected, the load coefficient K2 of the 1# position is automatically selected, and the abrasion time T2 of the wringing roller at the 1# position can be automatically calculated,
when the T2 accumulation reaches 15-18 days, the abrasion degree of the squeezing roller reaches the optimum state, and periodic replacement can be scheduled.
By analogy, in the production process, the abrasion time of the drying roller at the 3-12# position is automatically selected according to the current production roll and the mathematical model of the abrasion time of the drying roller, the length L of the current production roll is automatically selected, the running speed V of the current production roll is automatically selected, the grade steel type coefficient K1 of the current production roll is automatically selected, the 1# position load coefficient K2 is automatically selected, and the abrasion time T3-T12 of the drying roller at the 1# position can be automatically calculated.
When the accumulation of T3-T12 reaches 15-18 days, the abrasion degree of the drying roller reaches the optimal state, periodic replacement can be arranged, and the state tracking and real-time monitoring of the drying roller are realized.
According to the invention, through long-term production data statistics, the wear rule of the drying roller is determined from the grade steel of the produced steel coil, the length and the position load of the steel coil and the running speed of steel in production, a drying roller wear time mathematical model is established, the model is maintained in a secondary control system of the unit, and the tracking and the real-time monitoring of the state of the drying roller are realized.
After the preparation method is implemented in a Handover steel group cold rolling mill, the accurate control capability of the abrasion degree of the drying roller can be effectively improved, the accident rate of the drying roller is reduced by over 90 percent, the preparation method has great effects on the acid pickling quality and stable production of products, and the problem of accurate control of the abrasion degree of the drying roller is well solved.
Claims (2)
1. A method for judging the abrasion degree of a squeezing roller in acid cleaning is characterized by comprising the following steps:
step one, establishing a mathematical model of the wear time of a drying roll in acid washing
In the formula (1), T is the abrasion time of the drying roller, L is the length of a steel coil, V is the running speed of the strip steel, K1 is a brand steel coefficient, and K2 is a position load coefficient;
step two, maintaining a production secondary control system by using the mathematical model established in the step one, and automatically selecting the length for producing the current coil according to the length L of the steel coil of the current production coil; the running speed V of the strip steel automatically selects the running speed for producing the current coil; the grade steel type coefficient K1 automatically selects the grade steel type coefficient for producing the current coil; the position load coefficient K2 selects different coefficients according to positions;
and step three, calculating the abrasion time of the drying roller at different positions according to the established mathematical model of the abrasion time of the drying roller, and when the abrasion time of the drying roller at the corresponding position reaches 15-18 days, ensuring that the abrasion degree of the drying roller reaches the optimal state and arranging periodic replacement.
2. The method for determining the degree of squeeze roll wear in pickling according to claim 1, characterized in that: in the second step, the coefficient K1 of the grade steel is selected, and when the grade steel is stamping steel, the coefficient K1 of the grade steel is 1.1; when the steel grade is deep drawing steel, the coefficient K1 of the grade steel grade is 1.3; when the steel grade is ultra-deep drawing steel, the coefficient K1 of the grade steel grade is 1.4; when the steel grade is high-strength IF steel, the coefficient K1 of the grade steel grade is 1.4; when the steel grade is low-alloy high-strength steel, the coefficient K1 of the grade steel grade is 1.1; when the steel grade is barbecue hardening steel, the coefficient K1 of the grade steel grade is 1.2; when the steel grade is dual-phase steel, the coefficient K1 of the grade steel grade is 1.5; when the steel grade is martensite steel, the coefficient K1 of the grade steel grade is 1.3; when the steel grade is the composite steel, the coefficient K1 of the grade steel grade is 1.4.
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| JPH08155549A (en) * | 1994-11-30 | 1996-06-18 | Nippon Steel Corp | Method for diagnosing deterioration of surface of roll-shaped rotating body by wear |
| RU2128717C1 (en) * | 1995-04-14 | 1999-04-10 | Ниппон Стил Корпорейшн | Aggregate for making stainless steel strip |
| CN101417292B (en) * | 2008-12-16 | 2011-05-11 | 攀钢集团钢铁钒钛股份有限公司 | Method for controlling middle, low grade electric steel rolling using conventional rolling model |
| CN102236322B (en) * | 2010-04-21 | 2013-03-20 | 宝山钢铁股份有限公司 | Roller wear optimization control method for improving quality of band steel |
| CN104942020B (en) * | 2014-03-27 | 2017-09-12 | 上海梅山钢铁股份有限公司 | The wear-compensating of hot continuous rolling support roller and adaptive approach |
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| JP7128127B2 (en) * | 2018-02-02 | 2022-08-30 | 株式会社神戸製鋼所 | Straightening method of steel plate by roller leveler |
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