CN113664051B - Quick prediction method for weight deviation of deformed steel bar - Google Patents
Quick prediction method for weight deviation of deformed steel bar Download PDFInfo
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- CN113664051B CN113664051B CN202110838094.XA CN202110838094A CN113664051B CN 113664051 B CN113664051 B CN 113664051B CN 202110838094 A CN202110838094 A CN 202110838094A CN 113664051 B CN113664051 B CN 113664051B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The invention discloses a method for rapidly predicting weight deviation of deformed steel bar, wherein a finishing mill adopts an elliptical-circular hole type, and a finished product of the finishing mill is a circular section; the penultimate reducing sizing frame and the finished product frame adopt oval-round hole type, and a hard alloy roll collar is used; and measuring the sectional area of the incoming material before reducing sizing between the finishing mill and the reducing sizing by using a diameter measuring instrument, and judging the weight deviation of the deformed steel bar finished product by the size of the sectional area. By adopting the prediction method, whether the weight deviation of the thread steel finished product of the wire rod with the specification of phi 6.0-phi 10mm is within the standard allowable range can be rapidly and accurately judged in the high-speed production process of the thread steel so as to carry out production adjustment in time, ensure that the weight deviation of the thread steel meets the national standard requirements, avoid mass production unqualified products caused by hysteresis of finished product inspection, reduce waste judgment caused by the fact that the weight deviation does not meet the standard requirements, reduce economic loss, reduce shutdown time caused by waiting for weight deviation detection, and improve the production efficiency and the finished product qualification rate of the thread steel.
Description
Technical Field
The invention belongs to the technical field of steel, and relates to a method for rapidly predicting weight deviation of deformed steel bars.
Background
The manufacturing process of the deformed steel bar in the high-speed wire factory comprises the following steps: heating a 150 mm-12 m blank by a stepping heating furnace, heating the blank to a preset temperature by a preheating section, a heating section and a soaking section, then feeding the blank into a flat alternate torsion-free rolling mill for rolling, performing rough rolling for 6 times, medium rolling for 6 times, pre-finish rolling for 4 times, finishing rolling for 10 times, reducing sizing for 2 times, rolling into phi 6.0-phi 10mm specification screw steel after 28 times, controlling tissue transformation on a Steyr air cooling line, collecting into rolls, packaging and shipping. The screw-thread steel can be produced in batches after the quality inspector detects weight deviation after the screw-thread steel is subjected to trial rolling after roll replacement, so that the detection time is long, and the production efficiency is affected; and because the roller wears in the production process, the weight deviation of the screw-thread steel finished product is influenced to a certain extent, the screw-thread steel finished product needs to be adjusted in time, and if the screw-thread steel finished product is not adjusted in time, batch unqualified products can be caused, so that huge economic loss is caused. Therefore, a rapid prediction method for weight deviation of deformed steel bars is highly required.
Disclosure of Invention
In order to rapidly predict the weight deviation of the deformed steel bar in the deformed steel bar production process, the influence of waiting quality inspectors to detect the weight deviation in the test rolling on the production efficiency and the batch of unqualified products caused by roller abrasion are reduced.
The invention adopts the following technical scheme:
a method for rapidly predicting weight deviation of deformed steel bar is characterized by comprising the following steps:
heating 150 mm/12 m blanks by a heating furnace, feeding the blanks into a rolling mill for rolling, and rolling into a threaded steel finished product with the specification of phi 6.0-phi 10mm by 28 frames through rough rolling 6 frames, middle rolling 6 frames, pre-finish rolling 4 frames, finishing rolling 10 frames and reducing sizing 2 frames,
the finishing mill adopts an elliptic-circular hole type, and the finished product of the finishing mill is a circular section;
the penultimate reducing sizing stand and the finished product stand adopt oval-round hole types, and hard alloy roll collars are used, when the phi 6mm specification deformed steel is produced, the penultimate stand hole is 5mm high and is preset to be 1.1mm in roll gap, and the finished product stand hole is 5.92mm high and is preset to be 1.3mm in roll gap; when producing the phi 8mm specification deformed steel bars, the preset roll gap of the penultimate secondary hole is 6.7mm high, 1.2mm high, and the preset roll gap of the finished secondary hole is 7.75mm high, 1.90mm high; when the phi 10mm specification deformed steel bars are produced, the preset roll gap of 8.6mm in height of the penultimate secondary hole is 1.30mm, and the preset roll gap of 9.7mm in height of the finished secondary hole is 1.80mm;
the method comprises the following steps of measuring the sectional area of the incoming material before reducing sizing between a finishing mill and the reducing sizing by using a diameter measuring instrument, and judging the weight deviation of a deformed steel bar finished product by the sectional area, wherein the specific method is as follows:
the diameter reducing hole is designed according to the weight deviation of 0 percent, and the sectional area of the feed material before diameter reducing is 36-39 mm when producing or trial rolling the phi 6mm specification deformed steel bar 2 The weight deviation of the finished product is within the standard allowable +/-6 percent; the cross section area of the material before reducing sizing is 58-64 mm when producing or trial rolling the phi 8mm specification deformed steel bar 2 The weight deviation of the finished product is within the standard allowable +/-6 percent; the cross section area of the incoming material before reducing sizing is between 151 and 166mm when producing or trial rolling the phi 10mm specification deformed steel bar 2 The weight deviation of the finished product is within the standard allowable + -6% range, and the weight deviation is not within the standard allowable + -6% range if the sectional area is out of range.
By adopting the prediction method, whether the weight deviation of the thread steel finished product of the wire rod with the specification of phi 6.0-phi 10mm is within the standard allowable range can be rapidly and accurately judged in the high-speed production process of the thread steel so as to carry out production adjustment in time, ensure that the weight deviation of the thread steel meets the national standard requirements, avoid mass production unqualified products caused by hysteresis of finished product inspection, reduce waste judgment caused by the fact that the weight deviation does not meet the standard requirements, reduce economic loss, reduce shutdown time caused by waiting for weight deviation detection, and improve the production efficiency and the finished product qualification rate of the thread steel.
Description of the embodiments
The embodiment provides a method for rapidly predicting weight deviation of deformed steel bar, which comprises the following steps:
heating 150 mm/12 m blanks by a heating furnace, feeding the blanks into a rolling mill for rolling, and rolling into a threaded steel finished product with the specification of phi 6.0-phi 10mm by 28 frames through rough rolling 6 frames, middle rolling 6 frames, pre-finish rolling 4 frames, finishing rolling 10 frames and reducing sizing 2 frames,
the finishing mill adopts an elliptic-circular hole type, and the finished product (the feed before reducing and sizing) of the finishing mill is a circular section;
the second last reduction sizing stand and the finished product stand (27 # and 28# stand in the embodiment) adopt oval-round hole types, and hard alloy roll collars are used, when phi 6mm specification is produced, the height of the 27# stand holes is 5mm, the preset roll gap is 1.1mm, and the height of the 28# stand holes is 5.92mm, the preset roll gap is 1.3mm; when the phi 8mm specification is produced, the height of the 27# frame secondary hole is 6.7mm, the preset roll gap is 1.2mm, and the height of the 28# frame secondary hole is 7.75mm, and the preset roll gap is 1.90mm; when the phi 10mm specification is produced, the height of the 27# frame secondary hole is 8.6mm, the preset roll gap is 1.30mm, and the height of the 28# frame secondary hole is 9.7mm, and the preset roll gap is 1.80mm.
In the production process, the tension of the rolled piece between the finishing mill and the reducing sizing is kept stable, and the rolled piece is prevented from shaking violently.
And between the finishing mill and the reducing sizing, measuring the sectional area of the incoming material before the reducing sizing by using a diameter measuring instrument with the measuring precision of 0.01mm, and judging the weight deviation of the deformed steel bar finished product by the size of the sectional area.
The method for judging the weight deviation of the deformed steel bar finished product by the sectional area comprises the following steps: the diameter reducing hole is designed according to the weight deviation of 0 percent, and the sectional area of the feed before diameter reducing is 37.94mm when producing phi 6mm specification deformed steel bar 2 The weight deviation of the finished product is 0 percent, and the sectional area is 36-39 mm 2 The weight deviation of the finished product is-6% to +6%; reducing the cross section area of the feed material before sizing to 61.8mm when producing phi 8mm specification deformed steel bar 2 The weight deviation of the finished product is 0%, and the sectional area is 58-64 mm 2 The weight deviation of the finished product is-6% to +6%; reducing the cross section of the feed before sizing to 159mm when producing phi 10mm specification deformed steel bar 2 The weight deviation of the finished product is 0 percent, and the sectional area is 151-166 mm 2 The weight deviation of the finished product is-6% to +6%. If the sectional area of the incoming material before reducing sizing is 36-39 mm in the process of producing or trial rolling phi 6mm specification deformed steel 2 RangeThe weight deviation of the inner finished product is within the standard allowable +/-6%, and the sectional area of the feed stock before reducing sizing is 58-64 mm when producing or trial rolling phi 8mm specification deformed steel 2 The weight deviation of finished products is within the standard allowable +/-6%, and the sectional area of the incoming material before reducing sizing is 151-166 mm when producing or trial rolling phi 10mm specification deformed steel 2 The weight deviation of the finished product is within the standard allowable + -6% range, and the weight deviation is not within the standard allowable + -6% range if the sectional area is out of range.
Taking HRB400 for producing phi 8mm specification deformed steel bar as an example to verify the prediction method of the invention, wherein the rolling number is C90196302, 28 steel bars are totally used, in the normal production process, after the rolling number is C90196302, a quality inspector samples and inspects the first 5 steel bar finished products, the weight deviation of the finished products is minus 5 percent, and in the 19 th production process, the sectional area of the incoming materials is 57mm before the rolling worker monitors the reducing sizing on a calliper 2 For abnormity, the post-shutdown is used for notifying a quality inspection worker of sampling detection, the weight deviation of a finished product is-6.35% unqualified, and a steel rolling worker is arranged for adjusting the material type of a finishing mill, so that batch unqualified products are avoided, and economic loss can be effectively reduced.
Claims (5)
1. A method for rapidly predicting weight deviation of deformed steel bar is characterized by comprising the following steps:
heating 150 mm/12 m blanks by a heating furnace, feeding the blanks into a rolling mill for rolling, and rolling into a threaded steel finished product with the specification of phi 6.0-phi 10mm by 28 frames through rough rolling 6 frames, middle rolling 6 frames, pre-finish rolling 4 frames, finishing rolling 10 frames and reducing sizing 2 frames,
the finishing mill adopts an elliptic-circular hole type, and the finished product of the finishing mill is a circular section;
the penultimate reducing sizing stand and the finished product stand adopt oval-round hole types, and hard alloy roll collars are used, when the phi 6mm specification deformed steel is produced, the penultimate stand hole is 5mm high and is preset to be 1.1mm in roll gap, and the finished product stand hole is 5.92mm high and is preset to be 1.3mm in roll gap; when producing the phi 8mm specification deformed steel bars, the preset roll gap of the penultimate secondary hole is 6.7mm high, 1.2mm high, and the preset roll gap of the finished secondary hole is 7.75mm high, 1.90mm high; when the phi 10mm specification deformed steel bars are produced, the preset roll gap of 8.6mm in height of the penultimate secondary hole is 1.30mm, and the preset roll gap of 9.7mm in height of the finished secondary hole is 1.80mm;
the method comprises the following steps of measuring the sectional area of the incoming material before reducing sizing between a finishing mill and the reducing sizing by using a diameter measuring instrument, and judging the weight deviation of a deformed steel bar finished product by the sectional area, wherein the specific method is as follows:
the diameter reducing hole is designed according to the weight deviation of 0 percent, and the sectional area of the feed material before diameter reducing is 36-39 mm when producing or trial rolling the phi 6mm specification deformed steel bar 2 The weight deviation of the finished product is within the standard allowable +/-6 percent; the cross section area of the material before reducing sizing is 58-64 mm when producing or trial rolling the phi 8mm specification deformed steel bar 2 The weight deviation of the finished product is within the standard allowable +/-6 percent; the cross section area of the incoming material before reducing sizing is between 151 and 166mm when producing or trial rolling the phi 10mm specification deformed steel bar 2 The weight deviation of the finished product is within the standard allowable + -6% range, and the weight deviation is not within the standard allowable + -6% range if the sectional area is out of range.
2. The method for rapidly predicting weight deviation of deformed steel bar according to claim 1, wherein: reducing the cross section of the sizing material to 37.94mm before producing phi 6mm specification deformed steel bar 2 The weight deviation of the finished product is 0 percent.
3. The method for rapidly predicting weight deviation of deformed steel bar according to claim 1, wherein: reducing the cross section area of the sizing material to 61.8mm before producing phi 8mm specification deformed steel bar 2 The weight deviation of the finished product is 0 percent.
4. The method for rapidly predicting weight deviation of deformed steel bar according to claim 1, wherein: reducing the cross section area of the sizing material to 159mm before producing the phi 10mm specification deformed steel bar 2 The weight deviation of the finished product is 0 percent.
5. The method for rapidly predicting weight deviation of deformed steel bar according to claim 1, wherein tension of the rolled piece between the finishing mill and the reducing sizing is maintained stable during the production process, and the rolled piece is prevented from shaking severely.
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| JP2529621B2 (en) * | 1991-02-27 | 1996-08-28 | 住友金属工業株式会社 | Polishing method for rolling rolls |
| IT1400550B1 (en) * | 2010-06-09 | 2013-06-11 | Danieli Automation Spa | PROCEDURE AND DEVICE FOR THE DIMENSIONAL CHECK OF THE SECTION OF A LAMINATE PRODUCT. |
| CN207215038U (en) * | 2017-08-29 | 2018-04-10 | 唐山钢铁集团微尔自动化有限公司 | A kind of gauge or diameter of wire on-line measuring device |
| CN108126988B (en) * | 2017-12-13 | 2019-08-23 | 中冶京诚工程技术有限公司 | Bar negative deviation on-line measuring method and system |
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