CN115821031A - Method for controlling automatic feeding of heat treatment furnace heat exchange process steel plate - Google Patents
Method for controlling automatic feeding of heat treatment furnace heat exchange process steel plate Download PDFInfo
- Publication number
- CN115821031A CN115821031A CN202211510391.2A CN202211510391A CN115821031A CN 115821031 A CN115821031 A CN 115821031A CN 202211510391 A CN202211510391 A CN 202211510391A CN 115821031 A CN115821031 A CN 115821031A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- furnace
- temperature
- heat treatment
- charged
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control Of Heat Treatment Processes (AREA)
Abstract
The invention discloses a method for controlling automatic feeding of a heat treatment furnace heat exchange process steel plate, and belongs to the technical field of metallurgy automation. The method comprises the steps of judging whether the set furnace temperature of the last steel plate of the furnace is different from the set furnace temperature of the steel plate to be charged through a program, generating a process change production mark, wherein the steel plate with the process change production mark does not allow the steel plate to automatically enter the furnace, realizing the function of automatically setting the temperature of each heating area according to the real-time position of the steel plate in the heating area, calculating the time required by the heat preservation area of the heat treatment furnace to reach the set temperature according to the heating and cooling rates of the heat treatment furnace, and comparing the heating and cooling time with the time required by the steel plate to be charged to the heat preservation area, thereby automatically judging the time for the steel plate to be charged to the furnace and realizing the automatic furnace entering control of the steel plate to be charged to the heat treatment process. The method can effectively avoid the conditions of slow production rhythm and energy waste caused by untimely setting of the temperature of the artificial furnace or misjudgment and delay of the opportunity of the artificial furnace charging.
Description
Technical Field
The invention belongs to the technical field of metallurgy automation, and particularly relates to a method for controlling automatic feeding of a heat treatment furnace heat exchange process steel plate.
Background
In the production of the heat treatment furnace, the steel plate to be charged is allowed to enter the heat treatment furnace to be heated, and the following two conditions 1 are met, namely the allowance of vacancy in the furnace, namely the residual production space in the furnace is more than the length of the steel plate to be charged, and 2, the actual furnace temperature and the set furnace temperature are in the process deviation range. The heating processes of steel plates made of different materials are generally different, the furnace temperature needs to be changed correspondingly after the heating process is replaced each time, and the steel plates after the heating process are replaced need to be allowed to enter the furnace for production after the actual furnace temperature reaches the process range.
In the actual heat exchange process production mode, in order to not influence the temperature of the steel plate being produced in the furnace and ensure that the steel plate to be loaded can be fed into the furnace to be produced early under the condition of meeting the process requirements, the temperature of the front heating area is increased or decreased after the steel plate being produced moves for a certain distance. The distance between the heating area to be heated and cooled and the tail position of the steel plate in the furnace is generally 1-3 heating areas. In the production process, an operator is required to observe the temperature condition of the furnace and judge the proper time for entering the furnace. The last heating zone in the furnace is also called a holding zone, and because the furnace temperature of the holding zone is set after the last steel plate in the furnace is discharged, as long as the steel plate to be charged reaches the holding zone, the temperature of the holding zone reaches the set temperature and is within the process deviation range, and the steel plate to be charged can be charged into the furnace at the moment. In the actual production, the conditions of slow production rhythm and energy waste caused by the conditions of untimely setting of the temperature of the manual furnace or misjudgment and delay of the opportunity of manual furnace charging are easy to occur.
Based on the above, the invention designs a method for controlling the automatic feeding of the heat treatment furnace for replacing the heating process steel plate, so as to solve the problems.
Disclosure of Invention
The invention aims to solve the technical problems that the furnace temperature setting is not timely and the manual furnace charging time is not accurate when the heat treatment furnace is replaced and the heating process is carried out at present, and provides a method for automatically controlling the steel plate to enter the furnace for the heat treatment furnace to be replaced and heated.
In order to solve the technical problems, the invention provides the following technical scheme:
the method comprises the steps of firstly comparing a process set temperature of a steel plate to be installed with a process set temperature of the last steel plate produced in a furnace, when the process set temperature and the process set temperature are not equal, generating a process change production mark, wherein the steel plate to be installed with the process change production mark is not allowed to enter the furnace automatically (the process set temperature is issued by a superior system before the steel plate enters the furnace or is input manually), meanwhile, calculating a heating interval passing through in real time according to the position of the last steel plate produced in the furnace, automatically setting the 1 st to (K-a) heating intervals as the process temperature of the steel plate to be installed, simultaneously, calculating the time Ti required by the temperature of a heat preservation area (the last heating area in the furnace) to reach the set temperature of the steel plate to be installed according to the temperature rise or temperature drop rate of the heat treatment furnace, calculating the time Ta required by the steel plate to reach the heat preservation area in the furnace according to the length of the steel plate to be installed, the distance from the furnace door of the steel plate to be installed, the protection distance from the furnace door, the distance from the steel plate to the furnace to the heat preservation area after entering the furnace, the speed of the steel plate to be installed and the process speed of the steel plate to be installed, and the process speed of the steel plate to be installed to reach the heat preservation area in the furnace.
The method specifically comprises the following steps:
s1: comparing the process set temperature of the last steel plate produced in the furnace with the process set temperature of the steel plate to be installed in front of the furnace, and when the two are not equal, generating a process change production mark, wherein the steel plate to be installed with the process change production mark is not allowed to automatically enter the furnace;
s2: calculating the position of the tail part of the last steel plate in the furnace to be positioned in the Kth heating area, and automatically setting the temperature of the 1 st to (K-a) th heating areas as the process set temperature of the steel plate to be assembled, wherein a is a spacer area;
s3: calculating the time Ti required by the temperature of the heat preservation area to reach the process set temperature of the steel plate to be installed;
s4: calculating the time Ta required by the steel plate to be loaded to reach the temperature of the heat preservation area in the furnace;
s5: and judging whether Ta is greater than Ti, if so, clearing the process change production mark, allowing the steel plate to be loaded of the heating process to enter the furnace, and if Ta is less than Ti, not allowing the steel plate to be loaded to enter the furnace until Ta is greater than or equal to Ti.
Wherein the value range of a in S2 is 1-3.
And S3, the heat preservation area is the last heating area in the furnace.
In S3, ti = Ts + Td/Dt, wherein Ts is the time of the last steel plate in the furnace, td is the temperature difference between the process set temperature of the steel plate to be installed and the set temperature of the last steel plate in the furnace, dt is the temperature rise or fall rate of the heat treatment furnace, ti and Ts are in minutes, td is in centigrade, and Dt is in centigrade per minute.
In S4, ta = (L + da + db)/Vs + dc/Vt, wherein L is the length of the steel plate to be installed, da is the distance between the steel plate to be installed and the furnace door, db is the protection distance of the furnace door, dc is the distance between the steel plate to be installed and the heat preservation area after the steel plate to be installed enters the furnace, vs is the speed of the steel plate to be installed entering the furnace, and Vt is the process speed of the steel plate to be installed; where Ta is given in minutes, L, da, db, dc is given in meters, and Vs, vt is given in meters per minute.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
by the technical scheme, the problems of slow production rhythm and energy waste caused by the conditions of untimely manual furnace temperature setting or wrong judgment and delay of manual furnace charging opportunity and the like in actual production are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a process flow chart of a method for controlling automatic feeding of a steel plate for a heat treatment furnace heat exchange process according to embodiment 1 of the present invention;
fig. 2 is a schematic plan view related to an embodiment of the present invention.
Wherein: 1-a steel plate to be installed; 2-charging furnace door side; 3-a heating zone; 4-the position of the steel plate to be loaded after entering the furnace; 5-the last steel plate in the furnace.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a method for controlling automatic feeding of a steel plate in a heat treatment furnace heat exchange process.
As shown in fig. 1, the method comprises the steps of:
s1: comparing the process set temperature of the last steel plate produced in the furnace with the process set temperature of the steel plate to be installed in front of the furnace (wherein the process set temperature is issued by a superior system before the steel plate enters the furnace or is manually input), and generating a process change production mark when the process set temperature and the process set temperature are not equal, wherein the steel plate to be installed with the process change production mark is not allowed to enter the furnace automatically;
s2: calculating that the last steel plate in the furnace passes through K heating zones, and automatically setting the temperature of the 1 st to (K-a) th heating zone in front of the K heating zone as the process set temperature of the steel plate to be loaded, wherein a is a spacer;
s3: calculating the time Ti required by the temperature of the heat preservation area to reach the process set temperature of the steel plate to be installed;
s4: calculating the time Ta required by the steel plate to be loaded to reach the temperature of the heat preservation area in the furnace;
s5: and judging whether Ta is more than or equal to Ti, if so, clearing the process change production mark, allowing the steel plate to be loaded of the heat process to enter the furnace, and if Ta is less than Ti, not allowing the steel plate to be loaded to enter the furnace until Ta is more than or equal to Ti.
As shown in FIG. 2, the whole furnace is divided into N heating zones, the heating zone 3 at the tail of the last steel plate 5 in the furnace is the Kth heating zone (K < N), the length of the steel plate 1 to be loaded is L, the steel plate 1 to be loaded enters from the loading furnace door side 2, the distance between the steel plate to be loaded and the furnace door is da, the protection distance of the furnace door is db, and the distance between the steel plate to be loaded and the heat preservation zone from the position 4 of the steel plate to be loaded after entering the furnace is dc.
In the specific implementation process, the method comprises the following steps:
(1) Comparing the process set temperature of the last steel plate produced in the furnace with the process set temperature of the steel plate to be installed in front of the furnace, and when the two are unequal, generating a process change production mark on the steel plate, wherein the steel plate to be installed with the process change production mark is not allowed to automatically enter the furnace;
(2) Calculating the number of the last steel plate tail in the furnace passing through a plurality of heating zones by a program, recording the number of the last steel plate tail as K, and automatically setting the temperature of the heating zones from 1 st to (K-a) in front of the heating zone as the process temperature of the steel plate to be installed, wherein a is a spacer area, the value range of a is 1-3 in order to ensure that the temperature of the steel plate produced in the furnace is not influenced by temperature rise and drop, and a is 2 in the embodiment;
(3) Calculating the time Ti required by the temperature of the heat preservation area to reach the set temperature of the steel plate to be installed by a program, wherein Ti = Ts + Td/Dt, ts is the time of the last steel plate left in the furnace, td is the temperature difference between the set temperature of the steel plate to be installed and the set temperature of the last steel plate in the furnace, dt is the temperature rise or fall rate of the heat treatment furnace, and Dt is input on an HMI (human machine interface) picture by an operator based on the actual heating efficiency of the furnace, wherein the unit of Ti and Ts is minutes, the unit of Td is centigrade, and the unit of Dt is centigrade per minute;
(4) Calculating the time Ta, ta = (L + da + db)/Vs + dc/Vt, wherein L is the length of the steel plate to be loaded, da is the distance between the steel plate to be loaded and a furnace door, db is the protection distance of the furnace door, dc is the distance between the head position of the steel plate to be loaded after entering the furnace and the heat preservation area, vs is the entering speed of the steel plate to be loaded into the furnace, vt is the process speed of the steel plate to be loaded, wherein the unit of Ta is minute, the unit of L, da, db and dc is meter, and the unit of Vs and Vt is meter per minute;
(5) And judging whether Ta is more than or equal to Ti, if so, clearing the process change production mark, allowing the steel plate to be loaded of the heat process to enter the furnace, and if Ta is less than Ti, not allowing the steel plate to be loaded to enter the furnace until Ta is more than or equal to Ti.
The method is successfully applied to automatic furnace feeding control of a heat treatment furnace in a certain steel mill, reduces the labor intensity of operators, improves the production efficiency and the control precision, reduces the energy waste condition and is favored by users.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A method for controlling automatic feeding of a heat treatment furnace heat exchange process steel plate is characterized by comprising the following steps:
s1: comparing the process set temperature of the last steel plate produced in the furnace with the process set temperature of the steel plate to be installed in front of the furnace, and when the two are not equal, generating a process change production mark, wherein the steel plate to be installed with the process change production mark is not allowed to automatically enter the furnace;
s2: calculating the position of the tail part of the last steel plate produced in the furnace, which is positioned in the Kth heating zone, and automatically setting the temperatures of the 1 st to (K-a) th heating zones to be the process set temperature of the steel plate to be installed, wherein a is a spacer zone;
s3: calculating the time Ti required by the temperature of the heat preservation area to reach the process set temperature of the steel plate to be installed;
s4: calculating the time Ta required by the steel plate to be installed to reach the temperature of the heat preservation area in the furnace;
s5: and judging whether Ta is more than or equal to Ti, if Ta is more than or equal to Ti, clearing the process change production mark, allowing the steel plate to be loaded of the heating process to enter the furnace, and if Ta is less than Ti, not allowing the steel plate to be loaded to enter the furnace until Ta is more than or equal to Ti.
2. The method for automatically controlling the feeding of the heat treatment furnace heat exchange process steel plate into the furnace according to claim 1, wherein the value range of a in the S2 is 1-3.
3. The method for automatically controlling the feeding of a heat treatment furnace change heat process steel sheet according to claim 1, wherein the heat preservation zone in S3 is the last heating zone in the furnace.
4. The method of claim 1, wherein in the step S3, ti = Ts + Td/Dt, where Ts is a time of a last steel plate remaining in the furnace, td is a temperature difference between a process set temperature of the steel plate to be loaded and a set temperature of the last steel plate in the furnace, dt is a temperature increase or decrease rate of the heat treatment furnace, ti and Ts are in minutes, td is in degrees celsius, and Dt is in degrees celsius per minute.
5. The method for automatic furnace entry control of heat treatment furnace heat exchange process steel plate according to claim 1, wherein in S4 Ta = (L + da + db)/Vs + dc/Vt, wherein L is the length of the steel plate to be charged, da is the distance from the steel plate to the furnace door, db is the protection distance of the furnace door, dc is the distance from the steel plate to the holding zone after the steel plate to be charged is charged into the furnace, vs is the charging speed of the steel plate to be charged, and Vt is the process speed of the steel plate to be charged; where Ta is given in minutes, L, da, db, dc in meters, and Vs, vt in meters per minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211510391.2A CN115821031A (en) | 2022-11-29 | 2022-11-29 | Method for controlling automatic feeding of heat treatment furnace heat exchange process steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211510391.2A CN115821031A (en) | 2022-11-29 | 2022-11-29 | Method for controlling automatic feeding of heat treatment furnace heat exchange process steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115821031A true CN115821031A (en) | 2023-03-21 |
Family
ID=85532601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211510391.2A Pending CN115821031A (en) | 2022-11-29 | 2022-11-29 | Method for controlling automatic feeding of heat treatment furnace heat exchange process steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115821031A (en) |
-
2022
- 2022-11-29 CN CN202211510391.2A patent/CN115821031A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106119520A (en) | A kind of cold rolling hot dip galvanizing annealing furnace plate temperature coordinated control system and method | |
| CN102363161B (en) | Ultrafast cooling control method for H-shaped steel | |
| CN101519735B (en) | Method for controlling strip-steel head and tail temperature | |
| CN104289532B (en) | Strip steel watermark point temperature-controlled process | |
| CN115821031A (en) | Method for controlling automatic feeding of heat treatment furnace heat exchange process steel plate | |
| CN110408771B (en) | Annealing furnace process transition control method and device with temperature | |
| CN115852138B (en) | Automatic control system for heat treatment processing | |
| JP2809925B2 (en) | Sheet temperature control method for continuous annealing furnace | |
| US4606006A (en) | Method of controlling the rolling efficiency in hot rolling | |
| US3695594A (en) | Method and apparatus for operating a pusher type furnace | |
| CN113652533A (en) | Slab heating control method and device | |
| CA2178763A1 (en) | Ingot Preheater and Transfer for Magnesium Melt System | |
| CN109217312A (en) | Resistor furnace for heat treatment group's power load demand control system and control method | |
| JPH0791590B2 (en) | Velocity changing method in plate temperature control of continuous annealing furnace | |
| CN214556347U (en) | Brass red-punching sectional type induction heating equipment | |
| JPS6345454B2 (en) | ||
| DE2327903A1 (en) | Automatic regulation of clinker cooler - from air flow rates and temp. measurements | |
| DE3732041A1 (en) | Method of determining the time of heating-up processes in preheating ovens for dentistry | |
| JPH0754055A (en) | Method for controlling temperature of steel strip in continuous annealing furnace | |
| CN116332484A (en) | Glass forming tin bath control method | |
| CN114807590A (en) | Heating furnace-based billet heating two-stage control method and system | |
| JPS5760025A (en) | Method for controlling plate temperature | |
| Rogers et al. | Heat treating aluminum auto parts. | |
| KR960006030B1 (en) | Temperature fixing method of heating furnace atmosphere | |
| JPS5573831A (en) | Plate temperature control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |