CN113462885A - Dynamic positioning method applied to narrow space of heating furnace - Google Patents
Dynamic positioning method applied to narrow space of heating furnace Download PDFInfo
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- CN113462885A CN113462885A CN202110634419.2A CN202110634419A CN113462885A CN 113462885 A CN113462885 A CN 113462885A CN 202110634419 A CN202110634419 A CN 202110634419A CN 113462885 A CN113462885 A CN 113462885A
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- south
- furnace
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- blank
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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
- C21D11/00—Process control or regulation for heat treatments
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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
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
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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
- C21D9/70—Furnaces for ingots, i.e. soaking pits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
Abstract
A dynamic positioning method applied to a narrow space of a heating furnace is characterized in that a laser range finder is respectively arranged at the north and south ends of the charging side of a furnace body of the heating furnace, when a steel pusher pushes a material blank to a charging roller way outside the furnace, a length measuring button is clicked, a charging furnace door is automatically opened, so that the two ends of the material blank can be just irradiated by the two laser range finders from the south to the north, the actual length of the material blank is accurately calculated through the measurement values of the two laser range finders, the outer roller way of the furnace is started after the length measuring process is completed, the material blank starts to enter the furnace from the north to the south, the moving distance of the south end of the material blank is dynamically tracked in real time through the measurement values of the south end laser range finders in the charging process, the distance difference between the center line of the furnace body and the center line of the steel blank is calculated and judged through a PLC program, the roller way is decelerated twice according to the difference, and finally the center line of the steel blank is accurately stopped at the center line of the furnace body, and the accurate positioning of the material blank is realized. The invention improves the steel loading accuracy of the walking beam furnace and reduces the time cost of accident treatment and equipment maintenance.
Description
Technical Field
The invention relates to a rod and wire rolling and heating process, which is applied to the charging of a stepping heating furnace and is also suitable for the field with limited site and higher requirements on dynamic positioning accuracy.
Background
When the walking beam furnace is used in a rod and wire production line, a side-feeding steel loading mode is generally adopted, namely, raw materials are transported outside the furnace through a furnace-outside loading roller way, enter the furnace from a furnace door arranged on a side wall, are transported to a proper position through a furnace-inside cantilever roller way, are stopped, and a steel billet on the cantilever roller way is placed on a beam by means of a circulating action before the walking beam.
Generally, at least three static beams and two moving beams are arranged in a stepping heating furnace, a translation frame of each moving beam is supported by two rows of steel wheels to complete the up-down, left-right and up-down actions, so that when the moving beam supports blanks on a cantilever roller way to move forwards to a static beam orbital transfer position, at least two static beams can support the blanks no matter how large the deviation exists, and the blanks cannot fall off the way. In addition, if a large amount of steel billets are installed towards the same side in an inclined mode, the situation that the frame is inclined towards the side with the inclined mode continuously due to aggravation when the center of gravity of the frame deviates can be avoided due to the fact that the moving beam translation frame is supported by double rows of rails. Therefore, the requirement of the conventional side-mounted steel heating furnace on the accuracy of billet feeding positioning is not high.
The stainless steel wire factory walking beam heating furnace is limited by the site, only two static beams are arranged in the furnace, the widest position of the rail changing position of the soaking section is 2.75m, the length of the shortest raw material is 3.15m, and the average distance from the end part of the billet to the static beams is only 0.2m, so that the centering and positioning accuracy of the billet is required to be controlled within 0.15 m. The total number of the billet steel advancing from the furnace tail to the furnace mouth is 100, and if the deviation of each step is 2mm, a derailment accident inevitably occurs at the position of the track change. In addition, the movable beam frame is not supported by double-row rails due to space limitation, the double-row rails at the front end and the rear end of the frame are adopted, the middle single rail is arranged, once a large amount of materials are installed in a biased mode, the translation frame is inevitably subjected to torsional deformation, and then billet steel continuously deviates to the side where the materials are installed in a biased mode in the process of travelling.
The charging of the steel billet needs to be completed in two steps: measuring length outside the furnace and positioning in the furnace. The control process is as follows: the length measurement of the material blank is realized by utilizing a photoelectric switch and an encoder arranged on a motor shaft head in the advancing process of the material blank outside the furnace, and after the head enters the furnace, the centering and positioning in the furnace are completed by the encoder of the roller way in the furnace according to the advancing distance of the material blank, namely, the alignment of the central line of the furnace body and the central line of the material blank is realized. The length measurement and positioning mode of the encoder requires that the billet has a sufficiently long travelling distance, so that the measurement and calculation interval of the encoder is positioned at the uniform-speed advancing stage of the billet, namely the billet and the roller way move synchronously, and the relative movement stage between the billet and the roller way during acceleration is avoided, and relatively accurate data is obtained.
Because the distance for the billet to travel is less than 0.4 m and the billet is completely in the billet acceleration stage, the surface roughness and the friction coefficient of different steel grades are different, and the relative movement degrees of the billet and the roller way are different, the maximum measurement length error of the billet outside the furnace can reach 3 m, the centering and positioning of the billet in the furnace is directly influenced, the maximum centering and positioning error in the debugging reaches 0.5mm, and even the billet directly touches the anti-loading device to stop. If steel is loaded in the existing centering control mode, lateral deviation can be generated inevitably to damage a side furnace wall and a material blank falls off a channel, so that serious production accidents of forced furnace shutdown and steel taking are caused.
Disclosure of Invention
In order to improve the accuracy of the centering and positioning of the charging of the stepping heating furnace, eliminate the accident of steel billet derailment caused by large centering deviation and ensure the safe and stable operation of a heating furnace body, the invention provides a dynamic positioning method applied to the narrow space of the heating furnace.
The technical scheme of the invention is as follows: a dynamic positioning method applied to a narrow space of a heating furnace is characterized in that a laser range finder is respectively arranged at the south and north ends of the charging side of a heating furnace body, the north end laser range finder is arranged at the north end of a charging external roller way, the south end laser range finder is arranged on the south wall of the furnace body, a hole is formed in the south wall of the heating furnace body, the laser of the laser range finder penetrates through the heating furnace body to irradiate the upper part of a track in the furnace, when a pusher pushes a blank to the external charging roller way, a length measuring button is clicked, a charging furnace door is automatically opened, the two ends of the blank can be just irradiated by the south and north laser range finders, the actual length of the blank is accurately calculated through the measurement values of the south and north laser range finders, the external roller way is started after a length measuring process is completed, the blank starts to enter the furnace from the north to the south, the moving distance of the blank at the south end is dynamically tracked in real time by the measurement value of the south end laser range finder, the distance difference between the central line of the furnace body and the central line of the billet is continuously calculated and judged through a PLC program, the roller way is decelerated twice according to the difference, and finally the central line of the billet is accurately stopped at the central line of the furnace body, so that the material is uniformly placed on 2 static beams, and the precise positioning of the material blank is realized.
The laser range finder adopts non-contact laser range finder, gathers south, north measured value to PLC control system, calculates, the control procedure of rectifying through PLC control system, realizes the accurate location of material base.
The dynamic positioning system provided by the invention has the advantages that the positioning error in the billet furnace is less than or equal to 25mm, the requirement of accurate positioning in the charging process is completely met, the production accidents that the side wall is damaged by the transverse deviation of the billet and the billet falls off the way are avoided, the normal operation of the furnace body is ensured, the time for fault treatment and equipment maintenance is saved, and the obvious benefit is created for enterprises.
Drawings
Fig. 1 is a part of the software flow chart of the present invention (which is split into two pictures because the pictures are large and cannot be embodied in one picture).
FIG. 2 is another partial software flow diagram of the present invention.
Detailed Description
The dynamic positioning method applied to the narrow space of the heating furnace is characterized in that a laser range finder is respectively arranged at the south and north ends of the charging side of the heating furnace body, the north laser range finder is arranged at the north end of a roller way outside the charging furnace, the south laser range finder is arranged on the south wall of the furnace body, a hole is formed in the south wall of the heating furnace body, the laser of the laser range finder penetrates through the heating furnace body to irradiate the upper part of a track in the heating furnace, when a pusher pushes a billet to the roller way outside the charging furnace, a length measuring button is clicked, a charging furnace door is automatically opened by a system, the two ends of the billet can be irradiated by the south laser range finder and the north laser range finder, the actual length of the billet can be accurately calculated through the measurement values of the south laser range finder and the north laser range finder, and the error is ensured to be within 10 mm. After the length measuring process is completed, the external roller way is started, the material blank starts to enter the furnace from north to south, in the charging process, the measured value of the south laser distance meter dynamically tracks the advancing distance of the south end of the material blank in real time, the distance difference between the central line of the furnace body and the central line of the steel blank is continuously calculated and judged through a PLC program, the speed of the roller way is reduced twice according to the difference, and finally the central line of the steel blank is accurately stopped at the central line of the furnace body, so that the material is uniformly placed on 2 static beams, and the accurate positioning of the material blank is realized.
Claims (1)
1. A dynamic positioning method applied to a narrow space of a heating furnace is characterized in that a laser range finder is respectively arranged at the south and north ends of the charging side of a heating furnace body, the north end laser range finder is arranged at the north end of a charging external roller way, the south end laser range finder is arranged on the south wall of the furnace body, a hole is formed in the south wall of the heating furnace body, the laser of the laser range finder penetrates through the heating furnace body to irradiate the upper part of a track in the furnace, when a pusher pushes a blank to the external charging roller way, a length measuring button is clicked, a charging furnace door is automatically opened, the two ends of the blank can be just irradiated by the south and north laser range finders, the actual length of the blank is accurately calculated through the measurement values of the south and north laser range finders, the external roller way is started after a length measuring process is completed, the blank starts to enter the furnace from the north to the south, the moving distance of the blank at the south end is dynamically tracked in real time by the measurement value of the south end laser range finder, the distance difference between the central line of the furnace body and the central line of the billet is continuously calculated and judged through a PLC program, the roller way is decelerated twice according to the difference, and finally the central line of the billet is accurately stopped at the central line of the furnace body, so that the material is uniformly placed on 2 static beams, and the precise positioning of the material blank is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110634419.2A CN113462885A (en) | 2021-06-07 | 2021-06-07 | Dynamic positioning method applied to narrow space of heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110634419.2A CN113462885A (en) | 2021-06-07 | 2021-06-07 | Dynamic positioning method applied to narrow space of heating furnace |
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| CN113462885A true CN113462885A (en) | 2021-10-01 |
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| CN202110634419.2A Pending CN113462885A (en) | 2021-06-07 | 2021-06-07 | Dynamic positioning method applied to narrow space of heating furnace |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345009A (en) * | 2011-10-20 | 2012-02-08 | 攀钢集团西昌钢钒有限公司 | Method for automatically correcting tracking process of heating furnace |
| CN102421926A (en) * | 2009-03-12 | 2012-04-18 | 住友金属工业株式会社 | HIC-resistant thick steel sheet and UOE steel pipe |
| CN103993157A (en) * | 2014-06-09 | 2014-08-20 | 北京佰能电气技术有限公司 | Safe automatic steel-loading positioning device and method for heating furnace |
| CN104480295A (en) * | 2014-12-04 | 2015-04-01 | 北京佰能电气技术有限公司 | Transverse deviation detecting system for billet |
| CN105986116A (en) * | 2015-02-13 | 2016-10-05 | 鞍钢股份有限公司 | Method for controlling deviation of strip steel in continuous annealing furnace |
| CN209010580U (en) * | 2018-09-28 | 2019-06-21 | 莱芜钢铁集团电子有限公司 | Walking beam furnace stokehold positions online correcting device |
-
2021
- 2021-06-07 CN CN202110634419.2A patent/CN113462885A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102421926A (en) * | 2009-03-12 | 2012-04-18 | 住友金属工业株式会社 | HIC-resistant thick steel sheet and UOE steel pipe |
| CN102345009A (en) * | 2011-10-20 | 2012-02-08 | 攀钢集团西昌钢钒有限公司 | Method for automatically correcting tracking process of heating furnace |
| CN103993157A (en) * | 2014-06-09 | 2014-08-20 | 北京佰能电气技术有限公司 | Safe automatic steel-loading positioning device and method for heating furnace |
| CN104480295A (en) * | 2014-12-04 | 2015-04-01 | 北京佰能电气技术有限公司 | Transverse deviation detecting system for billet |
| CN105986116A (en) * | 2015-02-13 | 2016-10-05 | 鞍钢股份有限公司 | Method for controlling deviation of strip steel in continuous annealing furnace |
| CN209010580U (en) * | 2018-09-28 | 2019-06-21 | 莱芜钢铁集团电子有限公司 | Walking beam furnace stokehold positions online correcting device |
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Application publication date: 20211001 |
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