CN101168171A - Method for controlling negative deviation of steel bar with rib - Google Patents
Method for controlling negative deviation of steel bar with rib Download PDFInfo
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- CN101168171A CN101168171A CNA2007101984328A CN200710198432A CN101168171A CN 101168171 A CN101168171 A CN 101168171A CN A2007101984328 A CNA2007101984328 A CN A2007101984328A CN 200710198432 A CN200710198432 A CN 200710198432A CN 101168171 A CN101168171 A CN 101168171A
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Abstract
Provided is a control method of rib steel minus deviation for controlling rib steel minus deviation in the producing process. The control method is characterized in that the control method includes that in the rib steel producing process, a weight W blank can be gained after continuous weighing for the blank weight, a sample of the end product work section are figure up for the sample with weight W1, according to the deviation Wdev which is between the W blank and the sample weight W1, the rib steel assembly line can be adjusted and the end rib steel product with rational minus deviation can be produced. The control method of rib steel minus deviation employs the steel density invariance principle and weight method, the timely production adjustment can be realized by the appraise deviation and the D-value of the weight of end rib steel product and the theoretical minimum weight, the maximum minus deviation production of the rib steel can be high limit realized accurately, the control accuracy of the minus deviation can be highly improved, the mistake of the minus deviation control can be reduced, the maximum economic benefit can be realized in the rib steel manufacturing enterprises.
Description
Technical field
The invention belongs to the production technical field of armature wire in the smelting iron and steel, be specifically related to carry out in a kind of Ribbed Bar Rolling Production process the control method of the Ribbed Bar minus deviation of reasonable minus deviation control.
Background technology
The metallurgy industry Metallurgical Enterprise can not increased input or reduce under the prerequisite of input and improve lumber recovery when being carried out steel rolling by rational minus deviation is rolling, and minus deviation control is the effective way that iron and steel enterprise increases economic efficiency.Current steel market is increasingly competitive, and the user also improves day by day to the product quality requirement, and this has increased the difficulty that improves lumber recovery undoubtedly.Minus deviation is rolling to be that the cross dimensions of finished steel is controlled in the minus deviation scope of nominal dimension by standard, is the important channel of cost efficiency in the Rolling Production process, is the effective measures that improve lumber recovery.Minus deviation is rolling not only can save metal, reduce production costs, and can promote enterprise to raise the management level and the steel rolling production technology level.
In the existing metallurgical production, minus deviation control method when Ribbed Bar is rolling is the artificial controlled method for making, i.e. sampling by cold bed sampling room, utilize the physical dimension of vernier caliper measurement Ribbed Bar, rule of thumb judge the adjustable range of physical dimension, and will adjust the result and feed back to finish rolling and adjust workshop section and carry out the control of minus deviation.The defective of this minus deviation control method is that measure error is big, and this is that there is bigger deviation in the result of measurement owing to indulge the existence of rib and crescent cross rib; Be that feedback information is slower on the other hand, lack promptness, the speed of adjustment is slower.
Summary of the invention
The purpose of this invention is to provide a kind of method of weighing measurement that adopts and control minus deviation, measurement precision height, the adjustment information reflection in time, it is fast to regulate the speed, can effectively improve minus deviation to greatest extent, realize the control method of the Ribbed Bar minus deviation of the maximum minus deviation finish rolling system of Ribbed Bar, solve in the existing Ribbed Bar Rolling Production, can't realize occurring easily in reasonable minus deviation control and the minus deviation control defective of defective work.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of control method of Ribbed Bar minus deviation is used for the control of production process Ribbed Bar minus deviation, it is characterized in that described control method comprises: in the Ribbed Bar production process, the weight of blank weighed continuously obtains a weight W
Base, finished product is cut the sample that workshop section obtains calculates this example weight W
1, according to W
BaseWith example weight W
1Between deviate W
Partially, the Ribbed Bar production line is adjusted, obtain having the final Ribbed Bar finished product of reasonable minus deviation.
Concretely, described control method comprises: the finished product that obtains after the Ribbed Bar process cold bed workshop section is weighed, obtain the actual finished weight W of Ribbed Bar
Finished product, with actual finished weight W
Finished productFinished weight W with the maximum minus deviation of theory
MinimumRelatively, obtain an adjustable deviate W
Transfer, according to W
TransferThe described deviate W of size adjustment
PartiallyAmplitude of variation.
Described weight to blank is weighed continuously and is meant that direct employing computer weighs continuously to blank, obtains the weight change value W of blank
Base
The described Ribbed Bar production line is adjusted comprises: adjust the bar size of finishing stand or the heap of adjustment finishing stand and establish unprincipled connection.
Described method comprises: the finished product that obtains after the Ribbed Bar process cold bed workshop section is weighed, obtain the actual finished weight W of Ribbed Bar
Finished product, to actual finished weight W
Finished productFinished weight W with the maximum minus deviation of theory
MinimumRelatively, obtain an adjustable deviate W
Transfer, regulate W
PartiallyThe size of value and to regulating W
PartiallyThe adjustable deviate W that is directly obtained during value
Transfer, obtain W
PartiallyValue and adjustable deviate W
TransferBetween corresponding variation relation, according to this correspondence variation relation and W
TransferThe described deviate W of size adjustment
PartiallyAmplitude of variation.
Described control method specifically comprises:
(1) utilizes computer that the weight of blank is weighed continuously, obtain the minimizing weight W of blank
Base, finished product is cut the sample that workshop section obtains carry out measurements and calculations, obtain example weight W
1, with W
BaseAnd W
1The input computer contrasts continuously, obtains deviate W
Partially
(2) obtain the actual finished weight W of Ribbed Bar to weighing through the Ribbed Bar finished product that obtains after the cold bed workshop section
Finished product, according to the standard of this specification Ribbed Bar with allow maximum negative bias difference to calculate the finished weight W of theoretical maximum minus deviation
Minimum, with W
Finished productWith W
MinimumCompare, obtain an adjustable deviate W
Transfer
(3) the Ribbed Bar production line is adjusted, obtained W
PartiallyWith W
TransferBetween corresponding variation relation, according to this correspondence variation relation and W
TransferSize determine W
PartiallyThe variation size, and adjust the Ribbed Bar production line and make W
PartiallyThe variation of value meets described requirement, obtains the Ribbed Bar finished product of desirable minus deviation.
Described control method is specific as follows:
(1) utilizes computer that the weight of blank is weighed continuously, obtain the minimizing weight W of blank
Base, finished product cut sample that workshop section obtains carries out linear measure longimetry and weight is calculated, obtain example weight W
1, with W
BaseAnd W
1The input computer contrasts continuously, obtains deviate W
Partially
(2) obtain the actual finished weight W of Ribbed Bar to weighing through the Ribbed Bar finished product that obtains after the cold bed workshop section
Finished product, according to the standard of this specification Ribbed Bar with allow maximum negative bias difference to calculate the finished weight W of theoretical maximum minus deviation
Minimum, with W
Finished productWith W
MinimumCompare, obtain an adjustable deviate W
Transfer
(3) according to adjustable deviate W
TransferValue the Ribbed Bar production line is adjusted, and to adjusted example weight W
1With finished weight W
Finished productCompare, according to formula:
W
Base=W
1+ W
Partially=W
Finished product
Relation determine W under the different conditions of production
PartiallyValue, and according to this W that determines
PartiallyValue and described formula are obtaining example weight W
1The time, estimation W
Finished productValue, carry out the adjustment of Ribbed Bar production line, in time realize the reasonable control of Ribbed Bar minus deviation.
In the control method of this Ribbed Bar minus deviation, the finished weight W of theoretical maximum minus deviation
MinimumCan calculate with hot rolled ribbed steel bar national standard B1499-1998 according to armored concrete, every meter people sees Table 1 with the data of specification theoretical weight and minimum weight.
The nominal cross-sectional area of table 1 Ribbed Bar and the theoretical weight table of comparisons
| Nominal diameter mm | Theoretical weight kg/m | The deviation % of actual weight and theoretical weight | Minimum weight kg/m |
| 10 | 0.617 | -7 | 0.574 |
| 12 | 0.888 | -7 | 0.826 |
| 14 | 1.21 | -5 | 1.15 |
| 16 | 1.58 | -5 | 1.501 |
| 18 | 2.00 | -5 | 1.9 |
| 20 | 2.47 | -5 | 2.347 |
| 22 | 2.98 | -4 | 2.861 |
| 25 | 3.85 | -4 | 3.696 |
| 28 | 4.83 | -4 | 4.637 |
| 32 | 6.31 | -4 | 6.058 |
The present invention calculates by the weight of finished product in the blank and the Ribbed Bar operation of rolling being cut workshop section's test sample, obtains the deviation of weight value W of the two
Partially, by the Ribbed Bar finished product after the cold bed workshop section is carried out actual weighing, obtain W then
Finished productCalculate the finished weight W of theoretical maximum minus deviation according to last table
Minimum, according to W
Finished productWith W
MinimumCalculate the difference W between the two
Transfer, W
TransferThe gravimetric value of the Ribbed Bar finished product that can regulate exactly.If W
Finished productValue greater than W
MinimumValue, just represent that the Ribbed Bar finished weight also has certain scope to regulate from theoretical boundary; If W
Finished productValue less than W
MinimumValue, just represent the Ribbed Bar finished weight less than theoretical boundary, finished product has belonged to defective work.
According to above-mentioned W
TransferThe size of value, the Ribbed Bar production line is adjusted, thereby is obtained W
PartiallyThe certain limit of value in amplitude of variation, by to W
PartiallyValue change and corresponding W
TransferValue transform between relation, the correspondence that can obtain the two changes empirical value.Change empirical value according to this, just can realize W
PartiallyRegulate and change to follow the tracks of, just can accurately estimate the negative bias difference of final rolling Ribbed Bar finished product, realize in time feedback and accurately control at rolling interlude.
This minus deviation control method is according to the constant principle of steel density, the i.e. weight W of blank
BaseWeight W with final Ribbed Bar
Finished productKeep to equate, have following relation between example weight that workshop section obtains and said two devices and cut at finished product:
W
Base=W
1+ W
Partially=W
Finished product
W wherein
PartiallyBe the deviation effects that factors such as scaling loss in crop, back-end crop, the stove in the Ribbed Bar operation of rolling cause, W
PartiallyAlso relevant with art such as the tapping temperature of chemical composition, the length of blank heating time, blank of blank and finished product roller footpath in the operation of rolling.Under normal working condition, the length of crop, back-end crop is constant, because cause W
PartiallyThe principal element that changes is a scaling loss in the Ribbed Bar temperature of coming out of the stove and the stove, by to billet weight W
BaseWith example weight W
1METHOD FOR CONTINUOUS DETERMINATION, can be to W
PartiallyForm more accurate estimation.Weight W at the first tie rib steel muscle finished product
Finished productAnd W
TransferWhen value is in time fed back, according to W
PartiallyValue and example weight can make things convenient for, determine timely adjustable scope to obtain optimal minus deviation.The different in process of production conditions of production, as ordinary production, improper production, start rolling temperature difference, fault time be under the square one, W
PartiallyValue may be different, but W
PartiallyValue under same situation, be essentially identical, so can be according to the W of actual measuring and calculating under the different conditions of production
PartiallyValue carry out the accurate estimation of same case.
At the W that obtains to adjust
TransferAfter the value, can adjust this Ribbed Bar production line, the minus deviation control of realizing ideal, these adjustment means are mainly the adjustment of finish rolling section, in not influencing into the scope of dimensional standard, can control minus deviation by the bar shaped of adjusting finishing stand, if W
Finished productGreater than W
Minimum, cocoa is with suitable the turning down of finish rolling bar shaped.The heap that these adjustment means can also be adjusted finishing stand establishes unprincipled connection to control, and regulates heap between finishing stand and puts or draw a little, promptly changes the weight of finished product unit length.
Beneficial effect of the present invention is, the control method of this Ribbed Bar minus deviation is utilized the constant principle of iron and steel density, the method that employing is weighed, according to the difference between Ribbed Bar finished weight and the theoretical minimum weight and the deviation of estimation, realize producing the most timely adjusting, accurately and to greatest extent realize the maximum minus deviation production of Ribbed Bar, significantly improved the control accuracy of minus deviation, reduced the error of minus deviation control, for Ribbed Bar manufacturing enterprise brings living maximum economic benefits.
The specific embodiment
Below in conjunction with concrete Comparative Examples and embodiment the present invention is done into one elaboration.
Wire rod production line that employing U.S. J. P. Morgan ﹠ Co. provides and pass technology are as the objective for implementation of this Ribbed Bar minus deviation control method.
Comparative Examples utilizes Ribbed Bar dimensional measurement mode that nominal diameter is carried out minus deviation control for the Ribbed Bar production of 10mm, 14mm, 18mm and 25mm, after the start of Ribbed Bar production line, sampleman by cold bed sampling room carries out the sampling of Ribbed Bar, use the physical dimension of vernier caliper measurement Ribbed Bar then, possible physical dimension during then according to maximum minus deviation, and will adjust the adjustment worker that the result feeds back to finish rolling workshop section, and carrying out minus deviation control, sampling and measuring is spaced apart 1 hour.The result shows, because each sampling and measuring personnel's subjectivity difference causes the adjustment error of finish rolling workshop section very big, defective work occurs, there is certain proportion in the product quantity that promptly surpasses maximum minus deviation always, and is especially serious in a period of time after sampling personnel handing-over.Simultaneously, find through detection final Ribbed Bar finished product, the control fluctuating range of minus deviation is bigger, nominal diameter is to be 6.4% under the minus deviation optimal cases of Ribbed Bar of 10mm, nominal diameter is to be 4.4% under the minus deviation optimal cases of Ribbed Bar of 14mm, nominal diameter is to be 3.4% under the minus deviation optimal cases of Ribbed Bar of 18mm, and nominal diameter is also to be about 3.4% under the minus deviation optimal cases of Ribbed Bar of 18mm.
The method that embodiment adopts the present invention to weigh is controlled the minus deviation of Ribbed Bar, places a computer on the Ribbed Bar production line, adopts this computer that blank is weighed continuously, obtains the weight change value W of blank
Base, cut the position at the 4# of Ribbed Bar production line, promptly take a sample in the finished product place of cutting, and carries out linear measure longimetry to obtaining sample, and calculate the example weight W at this place
1, and with this W
1The input computer can have the computer contrast to obtain W like this
BaseAnd W
1Deviate W
Partially
The finished product that obtains after the Ribbed Bar process cold bed workshop section is weighed, obtain the finished weight W of Ribbed Bar
Finished product,, can calculate the desirable minimum weight value W under the maximum minus deviation situation of this Ribbed Bar according to the maximum negative bias difference of the corresponding specification among the hot rolled ribbed steel bar national standard B1499-1998
Minimum, finished weight W
Finished productWith minimum weight value W
MinimumDifference W
TransferBe the weight range of adjustable Ribbed Bar.
Utilize the bar size of adjusting finishing stand or the heap of adjusting finishing stand to establish unprincipled connection the Ribbed Bar production line is adjusted, if W
Finished productGreater than W
Minimum, illustrating that every meter weight of finished product can be smaller again, the bar size of finishing mill can be turned down under this situation, perhaps will transfer drawing a little between finishing stand.Otherwise, illustrating that then every meter weight of finished product need be transferred greatly, the bar size of finishing mill can be transferred greatlyyer under this situation, perhaps will transfer the heap point between finishing stand.
In the process of above-mentioned adjustment, continue W
1Carry out measurements and calculations, and obtain W according to the different conditions of production
PartiallyWith W
TransferBetween the relativity that exists, according to
W
Base=W
1+ W
Partially=W
Finished product
This computing formula obtains the W under the different working conditions
2Determined value, further obtaining example weight W
1In time, just can be controlled the reasonable minus deviation of finished product according to this formula timely.
Our experiments show that, this control method is timely, accurately, the defective condition of production of minus deviation can not appear surpassing, check to the Ribbed Bar finished product simultaneously shows, the minus deviation fluctuation range of finished product is very little, nominal diameter is to be 6.6% under the minus deviation average case of Ribbed Bar of 10mm, nominal diameter is to be 4.6% under the minus deviation average case of Ribbed Bar of 14mm, nominal diameter is to be 4.7% under the minus deviation average case of Ribbed Bar of 18mm, nominal diameter is to be about 3.6% under the minus deviation average case of Ribbed Bar of 25mm, can realize good economic benefit.
Claims (7)
1. the control method of a Ribbed Bar minus deviation is used for the control of production process Ribbed Bar minus deviation, it is characterized in that described control method comprises: in the Ribbed Bar production process, the weight of blank weighed continuously obtains a weight W
Base, finished product is cut the sample that workshop section obtains calculates this example weight W
1, according to W
BaseWith example weight W
1Between deviate W
Partially, the Ribbed Bar production line is adjusted, obtain having the final Ribbed Bar finished product of reasonable minus deviation.
2. the control method of Ribbed Bar minus deviation according to claim 1 is characterized in that described control method comprises: the finished product that obtains after the Ribbed Bar process cold bed workshop section is weighed, obtain the actual finished weight W of Ribbed Bar
Finished product, with actual finished weight W
Finished productFinished weight W with the maximum minus deviation of theory
MinimumRelatively, obtain an adjustable deviate W
Transfer, according to W
TransferThe described deviate W of size adjustment
PartiallyAmplitude of variation.
3. the control method of Ribbed Bar minus deviation according to claim 1 is characterized in that described weight to blank is weighed continuously to be meant that direct employing computer weighs continuously to blank, obtains the weight change value W of blank
Base
4. the control method of Ribbed Bar minus deviation according to claim 1 is characterized in that the described Ribbed Bar production line is adjusted comprises: adjust the bar size of finishing stand or the heap of adjustment finishing stand and establish unprincipled connection.
5. require the control method of 1 described Ribbed Bar minus deviation according to power, it is characterized in that described method comprises: the finished product that obtains after the Ribbed Bar process cold bed workshop section is weighed, obtain the actual finished weight W of Ribbed Bar
Finished product, to actual finished weight W
Finished productFinished weight W with the maximum minus deviation of theory
MinimumRelatively, obtain an adjustable deviate W
Transfer, regulate W
PartiallyThe size of value and to regulating W
PartiallyThe adjustable deviate W that is directly obtained during value
Transfer, obtain W
PartiallyValue and adjustable deviate W
TransferBetween corresponding variation relation, according to this correspondence variation relation and W
TransferThe described deviate W of size adjustment
PartiallyAmplitude of variation.
6. require the control method of 1 described Ribbed Bar minus deviation according to power, it is characterized in that described control method specifically comprises:
(1) utilizes computer that the weight of blank is weighed continuously, obtain the minimizing weight W of blank
Base, finished product is cut the sample that workshop section obtains carry out measurements and calculations, obtain example weight W
1, with W
BaseAnd W
1The input computer contrasts continuously, obtains deviate W
Partially
(2) obtain the actual finished weight W of Ribbed Bar to weighing through the Ribbed Bar finished product that obtains after the cold bed workshop section
Finished product, according to the standard of this specification Ribbed Bar with allow maximum negative bias difference to calculate the finished weight W of theoretical maximum minus deviation
Minimum, with W
Finished productWith W
MinimumCompare, obtain an adjustable deviate W
Transfer
(3) the Ribbed Bar production line is adjusted, obtained W
PartiallyWith W
TransferBetween corresponding variation relation, according to this correspondence variation relation and W
TransferSize determine W
PartiallyThe variation size, and adjust the Ribbed Bar production line and make W
PartiallyThe variation of value meets described requirement, obtains the Ribbed Bar finished product of desirable minus deviation.
7. require the control method of 1 described Ribbed Bar minus deviation according to power, it is characterized in that described control method is specific as follows:
(1) utilizes computer that the weight of blank is weighed continuously, obtain the minimizing weight W of blank
Base, finished product cut sample that workshop section obtains carries out linear measure longimetry and weight is calculated, obtain example weight W
1, with W
BaseAnd W
1The input computer contrasts continuously, obtains deviate W
Partially
(2) obtain the actual finished weight W of Ribbed Bar to weighing through the Ribbed Bar finished product that obtains after the cold bed workshop section
Finished product, according to the standard of this specification Ribbed Bar with allow maximum negative bias difference to calculate the finished weight W of theoretical maximum minus deviation
Minimum, with W
Finished productWith W
MinimumCompare, obtain an adjustable deviate W
Transfer
(3) according to adjustable deviate W
TransferValue the Ribbed Bar production line is adjusted, and to adjusted example weight W
1With finished weight W
Finished productCompare, according to formula:
W
Base=W
1+ W
Partially=W
Finished product
Relation determine W under the different conditions of production
PartiallyValue, and according to this W that determines
PartiallyValue and described formula are obtaining example weight W
1The time, estimation W
Finished productValue, carry out the adjustment of Ribbed Bar production line, in time realize the reasonable control of Ribbed Bar minus deviation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101984328A CN101168171A (en) | 2007-12-11 | 2007-12-11 | Method for controlling negative deviation of steel bar with rib |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101984328A CN101168171A (en) | 2007-12-11 | 2007-12-11 | Method for controlling negative deviation of steel bar with rib |
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ID=39389015
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|---|---|---|---|
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| CN102821882A (en) * | 2010-03-25 | 2012-12-12 | 住友金属工业株式会社 | Steel pipe production equipment |
| CN102861770A (en) * | 2012-08-28 | 2013-01-09 | 芜湖新兴铸管有限责任公司 | System for automatically displaying weight minus tolerance trend and application method of system |
| CN103464468A (en) * | 2013-08-15 | 2013-12-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for controlling weight deviation through after-rolling length of hot-rolled steel bar |
| CN104858242A (en) * | 2015-04-07 | 2015-08-26 | 江苏永钢集团有限公司 | Negative deviation monitoring system and negative deviation detection calculation method for ribbed steel bars |
| CN106799406A (en) * | 2016-12-06 | 2017-06-06 | 山东朋海节能科技有限公司 | The full scale intelligence control system of rod type steel and scale control method |
| CN107983778A (en) * | 2017-12-12 | 2018-05-04 | 张家港联峰钢铁研究所有限公司 | One kind is weighed milling method |
| CN108126988A (en) * | 2017-12-13 | 2018-06-08 | 中冶京诚工程技术有限公司 | Bar minus deviation On-line Measuring Method and system |
| CN112207129A (en) * | 2020-09-30 | 2021-01-12 | 盐城市联鑫钢铁有限公司 | Detection control method for out-of-roundness of base circle of hot-rolled ribbed steel bar |
| CN116651927A (en) * | 2023-06-09 | 2023-08-29 | 福建三宝钢铁有限公司 | Preparation device and method for CrHRB 400E-containing hot rolled ribbed steel bar product |
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| CN102821882B (en) * | 2010-03-25 | 2014-12-17 | 新日铁住金株式会社 | Steel pipe production method |
| CN102821882A (en) * | 2010-03-25 | 2012-12-12 | 住友金属工业株式会社 | Steel pipe production equipment |
| CN102861770B (en) * | 2012-08-28 | 2016-01-06 | 芜湖新兴铸管有限责任公司 | A kind of system of automatic display weight minus tolerance trend and application process thereof |
| CN102861770A (en) * | 2012-08-28 | 2013-01-09 | 芜湖新兴铸管有限责任公司 | System for automatically displaying weight minus tolerance trend and application method of system |
| CN103464468A (en) * | 2013-08-15 | 2013-12-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for controlling weight deviation through after-rolling length of hot-rolled steel bar |
| CN103464468B (en) * | 2013-08-15 | 2015-04-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for controlling weight deviation through after-rolling length of hot-rolled steel bar |
| CN104858242A (en) * | 2015-04-07 | 2015-08-26 | 江苏永钢集团有限公司 | Negative deviation monitoring system and negative deviation detection calculation method for ribbed steel bars |
| CN106799406A (en) * | 2016-12-06 | 2017-06-06 | 山东朋海节能科技有限公司 | The full scale intelligence control system of rod type steel and scale control method |
| CN107983778A (en) * | 2017-12-12 | 2018-05-04 | 张家港联峰钢铁研究所有限公司 | One kind is weighed milling method |
| CN108126988A (en) * | 2017-12-13 | 2018-06-08 | 中冶京诚工程技术有限公司 | Bar minus deviation On-line Measuring Method and system |
| CN108126988B (en) * | 2017-12-13 | 2019-08-23 | 中冶京诚工程技术有限公司 | Bar minus deviation On-line Measuring Method and system |
| CN112207129A (en) * | 2020-09-30 | 2021-01-12 | 盐城市联鑫钢铁有限公司 | Detection control method for out-of-roundness of base circle of hot-rolled ribbed steel bar |
| CN116651927A (en) * | 2023-06-09 | 2023-08-29 | 福建三宝钢铁有限公司 | Preparation device and method for CrHRB 400E-containing hot rolled ribbed steel bar product |
| CN116651927B (en) * | 2023-06-09 | 2024-05-28 | 福建三宝钢铁有限公司 | Preparation device and method for CrHRB E-containing hot rolled ribbed steel bar product |
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