CN111910069B - Anti-deviation tension setting method for cold-rolled strip steel continuous annealing heating furnace - Google Patents
Anti-deviation tension setting method for cold-rolled strip steel continuous annealing heating furnace Download PDFInfo
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- CN111910069B CN111910069B CN202010685807.9A CN202010685807A CN111910069B CN 111910069 B CN111910069 B CN 111910069B CN 202010685807 A CN202010685807 A CN 202010685807A CN 111910069 B CN111910069 B CN 111910069B
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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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/564—Tension control
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- 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
- C21D11/00—Process control or regulation for heat treatments
Abstract
The invention discloses a method for setting deviation-resistant tension of a cold-rolled strip steel continuous annealing heating furnace, which comprises the following steps of: monitoring the tracking data of the production line, correcting the tracking data by a tension roller in front of the continuous annealing heating furnace, and executing the next step when the head of the strip steel is monitored to enter a position 50m in front of the continuous annealing heating furnace; calculating deviation-preventing tension target parameters corresponding to the strip steels of different specifications according to the thickness of the strip steel, the width of the strip steel and the heating temperature of the strip steel; the deviation-preventing tension target parameter is stored in a data block of the PLC, the judgment is triggered before the head of the strip steel enters an inlet, and the execution logic is selected according to the production condition of the strip steel in the furnace; and the PLC executes logic judgment operation, executes tension switching logic at the triggering time of each area, and finishes the tension setting regulation of the coil of strip steel after the tail part of the strip steel leaves the final cooling section. The invention can improve the product percent of pass, prevent the production accidents of strip steel breakage, equipment collision and the like, and avoid the economic loss caused by the production accidents.
Description
Technical Field
The invention relates to the technical field of strip steel production, in particular to a method for setting deviation-resistant tension of a continuous annealing heating furnace of cold-rolled strip steel.
Background
The process setting of a continuous annealing heating furnace in a cold rolling continuous annealing unit is an important control link for ensuring the quality of strip steel products and improving the production efficiency of the products, and the main areas in the continuous annealing heating furnace are as follows: the method comprises 8 subareas of a preheating section (JPF), a heating section (RTF), a soaking Section (SF), a Slow Cooling Section (SCS), a fast cooling section (FC), an overaging section 1(OAS1), an overaging section 2(OAS2) and a Final Cooling Section (FCS), wherein in the production process, the problems of uneven heating temperature and the like often cause the deviation of strip steel due to the incoming material plate shape, the deviation is the engineering description that the central line of the strip steel in the width direction deviates from the central line of a roller way of production equipment in the production process, the deviation phenomenon in the production process of the strip steel can not only deteriorate the product plate shape and reduce the product qualification rate, but also can cause the production accidents such as strip steel breakage, equipment collision and the like, thereby causing the problems of equipment damage, production line halt and the like, and causing huge economic loss.
Disclosure of Invention
The invention aims to provide a method for setting the deviation-preventing tension of a cold-rolled strip steel continuous annealing heating furnace, which can improve the product percent of pass, prevent production accidents such as strip steel breakage, collision equipment and the like, and avoid economic loss caused by the production accidents.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for setting the deviation-preventing tension of a cold-rolled strip steel continuous annealing heating furnace comprises the following steps:
the method comprises the following steps: monitoring the tracking data of the production line, correcting the tracking data by using a tension roller before the welding line passes through the temper mill, wherein the deviation between the position of a tracking signal and the actual position of the head of the strip steel is less than 0.1m, and executing a second step when the head of the strip steel is monitored to enter the position 50m in front of the continuous annealing heating furnace;
step two: calculating anti-deviation tension target parameters corresponding to different specifications of strip steel according to the thickness of the strip steel, the width of the strip steel and the heating temperature of the strip steel, wherein a preheating section, a heating section, a soaking section, a slow cooling section, a fast cooling section, an overaging section 1, an overaging section 2 and a final cooling section in the continuous annealing heating furnace are arranged, and the total number of the tension control areas is 8;
step three: the deviation-preventing tension target parameter obtained in the step two is stored in a data block of a PLC (programmable logic controller), judgment is triggered before the head of the strip steel enters an inlet of a continuous annealing heating furnace, at the moment, execution logic is selected according to the strip steel production condition in the continuous annealing heating furnace, and the specific execution logic is as follows: if the tension of the strip steel in the continuous annealing heating furnace is higher than that of a subsequent new strip steel roll, directly performing tension adjustment operation on the preheating section in the furnace, and if the tension of the strip steel in the continuous annealing heating furnace is lower than that of the subsequent new strip steel roll, performing tension adjustment operation after the tail part of the strip steel in the continuous annealing heating furnace leaves the preheating section in the furnace;
step four: and the PLC executes logic judgment operation according to the physical position of each area in the continuous annealing heating furnace and the head position of the strip steel, the logic judgment operation is sequentially triggered and executed in the heating section, the soaking section, the slow cooling section, the fast cooling section, the overaging section 1, the overaging section 2 and the final cooling section respectively, corresponding tension switching logic is executed at the triggering time of each area, the tension switching logic is the same as the preheating section in the furnace in the step three, and after the tail part of the strip steel leaves the final cooling section in the continuous annealing heating furnace, the tension setting rule of the strip steel is finished.
Preferably, in the second step, the calculation formulas of the deviation-preventing tension target parameters of each tension control area are respectively as follows:
1) preheating section in the furnace:
；
2) a heating section:
；
3) a soaking section:
；
4) a slow cooling section:
；
5) and (3) a rapid cooling section:
；
6) overaging stage 1:
；
7) and (3) overaging section 2:
；
8) and (3) final cooling section:
；
and the unit of the deviation-preventing tension target parameter of each area is KN.
The invention has the following beneficial effects: the invention provides and verifies a control idea for avoiding the deviation problem of strip steel in a continuous annealing heating furnace through tension process setting in the continuous annealing heating furnace, summarizes the influence rules of the strip steel thickness, the strip steel width and the strip steel heating temperature of different specifications on the strip steel deviation, obtains an optimal tension target setting model suitable for each tension control area in the continuous annealing heating furnace, can set tension setting regulations for preventing the deviation for strip steel products of different specifications, effectively avoids the deviation problem of the strip steel in the continuous annealing heating furnace, ensures that the production speed of the strip steel is unchanged while ensuring that the deviation problem of the strip steel does not occur, ensures the production efficiency of a production line, improves the product qualification rate, prevents the production accidents such as strip steel breakage, impact equipment and the like, and avoids economic loss caused by production accidents.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below.
A deviation-preventing tension setting method for a cold-rolled strip steel continuous annealing heating furnace comprises the following steps:
the method comprises the following steps: monitoring the tracking data of the production line, correcting the tracking data by using a tension roller before the welding line passes through the temper mill, wherein the deviation between the position of a tracking signal and the actual position of the head of the strip steel is less than 0.1m, and executing a second step when the head of the strip steel is monitored to enter the position 50m in front of the continuous annealing heating furnace;
step two: calculating deviation-preventing tension target parameters corresponding to different specifications of strip steel according to the thickness of the strip steel, the width of the strip steel and the heating temperature of the strip steel, wherein a preheating section, a heating section, a soaking section, a slow cooling section, a fast cooling section, an over-aging section 1, an over-aging section 2 and a final cooling section in a furnace are arranged in the continuous annealing heating furnace, and 8 tension control areas are totally arranged;
step three: and B, storing the deviation-preventing tension target parameters acquired in the step two into a data block of the PLC, triggering and judging before the head of the strip steel enters an inlet of the continuous annealing heating furnace, and selecting execution logic according to the strip steel production condition in the continuous annealing heating furnace, wherein the specific execution logic is as follows: if the tension of the strip steel in the continuous annealing heating furnace is higher than that of a subsequent new strip steel roll, directly performing tension adjustment operation on the preheating section in the furnace, and if the tension of the strip steel in the continuous annealing heating furnace is lower than that of the subsequent new strip steel roll, performing tension adjustment operation after the tail part of the strip steel in the continuous annealing heating furnace leaves the preheating section in the furnace;
step four: and the PLC executes logic judgment operation according to the physical position of each area in the continuous annealing heating furnace and the head position of the strip steel, the logic judgment operation is sequentially triggered and executed in the heating section, the soaking section, the slow cooling section, the fast cooling section, the overaging section 1, the overaging section 2 and the final cooling section respectively, corresponding tension switching logic is executed at the triggering time of each area, the tension switching logic is the same as the preheating section in the furnace in the step three, and after the tail part of the strip steel leaves the final cooling section in the continuous annealing heating furnace, the tension setting rule of the strip steel is finished.
Preferably, in the second step, the calculation formulas of the deviation-preventing tension target parameters of each tension control area are respectively as follows:
1) preheating section in the furnace:
；
2) a heating section:
；
3) a soaking section:
；
4) a slow cooling section:
；
5) and (3) a rapid cooling section:
；
6) overaging stage 1:
；
7) and (3) overaging section 2:
；
8) and (3) final cooling section:
；
and the unit of the deviation-preventing tension target parameter of each area is KN.
The invention provides and verifies a control idea for avoiding the deviation problem of the strip steel in the continuous annealing heating furnace through tension process setting in the continuous annealing heating furnace, summarizes the influence rules of the strip steel thickness, the strip steel width and the strip steel heating temperature of different specifications on the strip steel deviation, obtains an optimal tension target setting model suitable for each tension control area in the continuous annealing heating furnace, can set tension setting rules for preventing the deviation of strip steel products of different specifications, effectively avoids the deviation problem of the strip steel in the continuous annealing heating furnace, ensures that the production speed of the strip steel is unchanged while ensuring that the strip steel does not generate the deviation problem, ensures the production efficiency of a production line, improves the product qualification rate, prevents the production accidents of strip steel, collision equipment and the like, and avoids economic loss caused by production accidents.
Examples
The following description will be made with a production process of a coil of a strip steel having a thickness of 0.5mm, a width of 1366mm and a target heating temperature of 780 ℃ as an experimental object.
A deviation-preventing tension setting method for a cold-rolled strip steel continuous annealing heating furnace comprises the following steps:
the method comprises the following steps: monitoring the tracking data of the production line, tracking the position of the head of the strip steel away from the welding line over-temper mill, correcting the tracking data by using a tension roller in front of the welding line over-temper mill, wherein the deviation between the position of a tracking signal and the actual position of the head of the strip steel is 0.02m, and executing a second step when the head of the strip steel is monitored to enter the position 50m in front of the continuous annealing furnace;
step two: the method comprises the following steps of calculating deviation-preventing tension target parameters corresponding to different specifications of strip steel according to the thickness of the strip steel, the width of the strip steel and the heating temperature of the strip steel, wherein a preheating section, a heating section, a soaking section, a slow cooling section, a fast cooling section, an overaging section 1, an overaging section 2 and a final cooling section are arranged in a continuous annealing heating furnace, 8 tension control areas are obtained according to a deviation-preventing tension target parameter calculation formula of each tension control area, and the deviation-preventing tension target parameters of each tension control area are as follows:
step three: the deviation-preventing tension target parameter obtained in the second step is stored in a data block of a PLC, the judgment is triggered before the head of the strip steel enters an inlet of a continuous annealing heating furnace, at the moment, execution logic is selected according to the production condition of the strip steel in the continuous annealing heating furnace, the corresponding tension value of the strip steel at the preheating section in the furnace is 340.04KN, the deviation-preventing tension target parameter of the strip steel which is about to enter the continuous annealing heating furnace is 300.22KN and is lower than the corresponding tension value of the current strip steel, and therefore the corresponding tension value of the strip steel at the preheating section in the furnace is immediately adjusted to 300.22KN at the moment, and preparation is made for the strip steel;
step four: and the PLC executes logic judgment operation according to the physical position of each area in the continuous annealing heating furnace and the head position of the strip steel, the logic judgment operation is sequentially triggered and executed in the heating section, the soaking section, the slow cooling section, the fast cooling section, the overaging section 1, the overaging section 2 and the final cooling section respectively, corresponding tension switching logic is executed at the triggering time of each area, the tension switching logic is the same as the preheating section in the furnace in the step three, and after the tail part of the strip steel leaves the final cooling section in the continuous annealing heating furnace, the tension setting rule of the strip steel is finished.
Claims (1)
1. A method for setting the deviation-preventing tension of a cold-rolled strip steel continuous annealing heating furnace is characterized by comprising the following steps of:
the method comprises the following steps: monitoring the tracking data of the production line, correcting the tracking data by using a tension roller before the welding line passes through the temper mill, wherein the deviation between the position of a tracking signal and the actual position of the head of the strip steel is less than 0.1m, and executing a second step when the head of the strip steel is monitored to enter the position 50m in front of the continuous annealing heating furnace;
step two: calculating anti-deviation tension target parameters corresponding to different specifications of strip steel according to the thickness of the strip steel, the width of the strip steel and the heating temperature of the strip steel, wherein a preheating section, a heating section, a soaking section, a slow cooling section, a fast cooling section, an overaging section 1, an overaging section 2 and a final cooling section in the continuous annealing heating furnace are arranged, and the total number of the tension control areas is 8;
step three: and B, storing the deviation-preventing tension target parameters acquired in the step two into a data block of the PLC, triggering and judging before the head of the strip steel enters an inlet of the continuous annealing heating furnace, and selecting execution logic according to the strip steel production condition in the continuous annealing heating furnace, wherein the specific execution logic is as follows: if the tension of the strip steel in the continuous annealing heating furnace is higher than that of a subsequent new strip steel roll, directly performing tension adjustment operation on the preheating section in the furnace, and if the tension of the strip steel in the continuous annealing heating furnace is lower than that of the subsequent new strip steel roll, performing tension adjustment operation after the tail part of the strip steel in the continuous annealing heating furnace leaves the preheating section in the furnace;
step four: the PLC executes logic judgment operation according to the physical position of each area in the continuous annealing heating furnace and the head position of the strip steel, the logic judgment operation is sequentially triggered and executed in a heating section, a soaking section, a slow cooling section, a fast cooling section, an overaging section 1, an overaging section 2 and a final cooling section respectively, corresponding tension switching logic is executed at the triggering time of each area, the tension switching logic is the same as the preheating section in the furnace in the step three, and after the tail part of the strip steel leaves the final cooling section in the continuous annealing heating furnace, the tension setting procedure of the strip steel is completed;
in the second step, the calculation formulas of the deviation-preventing tension target parameters of each tension control area are respectively as follows:
1) preheating section in the furnace:
；
2) a heating section:
；
3) a soaking section:
；
4) a slow cooling section:
；
5) and (3) a rapid cooling section:
；
6) overaging stage 1:
；
7) and (3) overaging section 2:
；
8) and (3) final cooling section:
；
and the unit of the deviation-preventing tension target parameter of each area is KN.
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| CN113549856B (en) * | 2021-06-28 | 2022-08-16 | 鞍钢股份有限公司 | Method for controlling deviation in aluminum-zinc-plated semi-hard steel furnace and temperature in zinc furnace |
| CN114921640A (en) * | 2021-12-06 | 2022-08-19 | 首钢京唐钢铁联合有限责任公司 | Alarm system for preventing deviation in strip steel furnace |
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2020
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| CN102004812A (en) * | 2010-09-19 | 2011-04-06 | 首钢总公司 | Method for setting in-furnace tension of continuous annealing unit on line |
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