CN112380634B - Method for improving effective working layer of finish rolling working roll suitable for hot rolling old rolling mill - Google Patents
Method for improving effective working layer of finish rolling working roll suitable for hot rolling old rolling mill Download PDFInfo
- Publication number
- CN112380634B CN112380634B CN201910688526.6A CN201910688526A CN112380634B CN 112380634 B CN112380634 B CN 112380634B CN 201910688526 A CN201910688526 A CN 201910688526A CN 112380634 B CN112380634 B CN 112380634B
- Authority
- CN
- China
- Prior art keywords
- roll
- rolling
- working
- diameter
- effective
- 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.)
- Active
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005098 hot rolling Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/02—Roll dimensions
- B21B2267/06—Roll diameter
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a method for improving an effective working layer of a finish rolling working roll, which is suitable for a hot rolling old rolling mill, and belongs to the technical field of rolling mills; the method comprises the following steps: determining the diameter of a supporting roll of the steel rolling; step two: determining the variation amplitude of the allowable steel rolling conditions; step three: determining an effective working layer of a working roller, and determining a center distance of the working roller when the working roller is replaced; step four: the proportion of the supporting roller meeting the requirement of a larger working roller range; step five: solving the increment of the effective working layer in the fourth step; step five: setting the diameter increment of the working roller; step six: determining and calculating the diameter increment of the working roll; the diameter of the working roll meeting the requirements of the steel rolling condition and the roll changing condition is calculated to obtain the working roll most matched with the supporting roll, so that the roll consumption of the old rolling mill is reduced.
Description
Technical Field
The invention relates to a method for improving an effective working layer of a finish rolling working roll, which is suitable for a hot rolling old rolling mill, and belongs to the technical field of rolling mills.
Background
As the rolling mill manufacturing level and the roller manufacturing level are improved, the effective working layer of the roller of the new generation of rolling mill is obviously improved, for example, the effective working layer of the working roller at the front section of finish rolling reaches 100mm, and the effective working layer of the working roller at the rear section reaches 90mm.
The front working roll of the general old rolling mill is obviously improved by about 80mm and the rear working roll of the general old rolling mill is obviously improved by about 60 mm. The factor of the working layer causes a 20% rise in work roll consumption compared to the new mill.
In the prior art, a device or a method for optimizing a working roll of an old rolling mill is lacked, and a method for effectively reducing high roll consumption of the old rolling mill is lacked.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a method for reducing the roll consumption of an old rolling mill, which is high in work roll consumption of the old rolling mill.
The invention adopts the technical scheme that: the method for improving the effective working layer of the finish rolling working roll, which is suitable for a hot rolling old rolling mill, is characterized by comprising the following steps of:
step one: determining the maximum diameter D2 and the minimum diameter D1 of the diameter D of a support roll of the steel rolling; maximum diameter d2 and minimum diameter d1 of work roll diameter d and rolling allowance condition B;
the steel rolling allowable condition B is as follows: b=d/2+d,
the maximum range max=d2/2+d2 of the rolling allowable condition B,
the minimum range min=d1/2+d1 of the rolling allowable condition B;
step two: determining the variation range of the steel rolling allowable condition B as L, wherein the variation range is L which is the effective diameter of the working roll plus half of the effective diameter of the supporting roll,
L=（D2-D1）/2+（d2-d1）；
step three: determining an effective working layer X of the working roll, presetting a center distance Y of the working roll during roll changing, wherein the increase of the center distance is Y, and the increase of the effective working layer is X;
when the increase of the center distance is the same as the increase of the effective working layer, i.e., x=y;
the rolling conditions Dx need to be satisfied: dx/2+d2+x is less than or equal to D2/2+d2, dx is less than or equal to D2-2x, and the roll changing condition Dy needs to be satisfied: dy/2+ (d2+x)/2 is less than or equal to D2/2+d2/2-x to obtain Dy is less than or equal to D2-3x,
when the steel rolling condition Dx and the roll changing condition Dy are satisfied at the same time, the support roll diameter D needs to satisfy: d is less than or equal to D2-3x;
step four: the proportion of the supporting roller meeting the requirement of the range of the larger working roller is required to be larger than or equal to that of the larger working roller, otherwise, the small supporting roller is absent, so the increment x of the effective working layer is required to meet the following conditions:
x/（x+d2-d1）≤（D2-3x-D1）/（D2-D1）；
step five: when the increment x of the effective working layer is just satisfied, namely x/(x+d2-D1) = (D2-3 x-D1)/(D2-D1), solving the increment x of the effective working layer in the fourth step,
and (3) solving: x is x 2 +（d2-d1）x-（d2-d1）（D2-D1）=0；
Step five: let the work roll diameter increase be a, where a = kx, k be the effective coefficient;
step six: the work roll diameter increase a is determined and calculated.
A further improvement of the above scheme is that in an ideal state, k takes a value of 1; when the working roller is in a real environment, the k takes a value of 0.3-0.9.
The invention has the beneficial effects that: the diameter of the working roll meeting the requirements of the steel rolling condition and the roll changing condition is calculated to obtain the working roll most matched with the supporting roll, so that the roll consumption of the old rolling mill is reduced.
Detailed Description
By describing the embodiments, the detailed description of the present invention, such as the mutual positions and connection relations between the parts, the roles and working principles of the parts, the operation and use methods, etc., is further described in detail, so as to help those skilled in the art to more completely, accurately and deeply understand the concept and technical solution of the present invention.
Examples
The 1422 production line finishing mill group of Shanghai Meishan iron and steel stock company is an old rolling mill, the later section rolling mill is an old rolling mill with the model of F4-6, the maximum diameter of a supporting roll of F4-6 is 1380, the minimum diameter of the supporting roll is 1260, the maximum diameter of a working roll is 710, and the minimum diameter of the working roll is 645.
According to the method for improving the effective working layer of the finish rolling working roll, which is suitable for a hot rolling old rolling mill, the method comprises the following steps:
step one: determining the maximum diameters 1380 and 710 and the minimum diameters 1260 and 645 of the supporting roller diameter D and the working roller diameter D of the steel rolling and the steel rolling allowable condition B;
the steel rolling allowable condition B is: b=d/2+d;
as can be seen, the maximum range max=1380/2+710=1400 of the rolling allowable condition B, and the minimum range min=1260/2+645=1275 of the rolling allowable condition B;
step two: the variation amplitude of the steel rolling allowable condition B is determined to be L, wherein the variation amplitude is L is the effective diameter of the working roll plus half of the effective diameter of the supporting roll:
L=（D2-D1）/2+（d2-d1）=125；
step three: determining an effective working layer X of a working roller, a center distance Y of the working roller during roller changing, wherein the increase of the center distance is Y when the roller changing is preset, and the increase of the effective working layer is X; when the increase in center distance is the same as the increase in effective working layer, i.e., x=y;
the rolling conditions Dx need to be satisfied: dx/2+d2+x is less than or equal to D2/2+d2, so that Dx is less than or equal to D2-2x, namely Dx is less than or equal to 1380-2x;
the roll changing condition Dy needs to be satisfied: dy/2+ (d2+x)/2 is less than or equal to D2/2+d2/2-x, so that Dy is less than or equal to D2-3x, namely Dy is less than or equal to 1380-3x;
when the steel rolling condition Dx and the roll changing condition Dy are satisfied at the same time, the diameter D of the backup roll needs to satisfy: d is less than or equal to 1380-3x;
step four: the proportion of the supporting roller meeting the requirement of the range of the larger working roller is required to be larger than or equal to that of the larger working roller, otherwise, the small supporting roller is absent, so that the increment x of the effective working layer is required to meet the following conditions: x/(x+65) is less than or equal to (120-3 x)/(120);
step five: when the increment x of the effective working layer is just satisfied, namely solving the increment x of the effective working layer in the fourth step,
and (3) solving: x is x 2 ++ (D2-D1) X- (D2-D1) =0, solving for x=28.3;
step five: let the diameter increase of the work rolls be a, where a=kx, k be the effective coefficient, which is here taken to be 0.707 according to the magnitude of the friction of the production line;
step six: the work roll diameter increase a=0.707×28.3=20 is determined and calculated.
So the diameter of the working roll is increased by 20, the separating pile of the working roll bearing seat is increased by 20, the flat head fixing device of the working roll on the roll changing is increased by 20, and the maximum working diameter of the rear rolling mill F4-6 of the 1422 production line is increased from 65 to 85.
The invention is not limited to the above embodiments, and all technical solutions formed by equivalent substitution fall within the protection scope of the invention.
Claims (1)
1. The method for improving the effective working layer of the finish rolling working roll, which is suitable for a hot rolling old rolling mill, is characterized by comprising the following steps of:
step one: determining the maximum diameter D2 and the minimum diameter D1 of the diameter D of a support roll of the steel rolling; maximum diameter d2 and minimum diameter d1 of work roll diameter d and rolling allowance condition B;
the steel rolling allowable condition B is as follows: b=d/2+d,
the maximum range max=d2/2+d2 of the rolling allowable condition B,
the minimum range min=d1/2+d1 of the rolling allowable condition B;
step two: determining the variation amplitude of the steel rolling allowable condition B as L,
the change amplitude is L which is the effective diameter of the working roll plus half of the effective diameter of the supporting roll,
L=（D2-D1）/2+（d2-d1）；
step three: determining an effective working layer X of the working roll, presetting a center distance Y of the working roll during roll changing, wherein the increase of the center distance is Y, and the increase of the effective working layer is X;
when the increase of the center distance is the same as the increase of the effective working layer, i.e., x=y;
the rolling conditions Dx need to be satisfied: dx/2+d2+x is less than or equal to D2/2+d2, so as to obtain Dx is less than or equal to D2-2x,
the roll changing condition Dy needs to be satisfied: dy/2+ (d2+x)/2 is less than or equal to D2/2+d2/2-x to obtain Dy is less than or equal to D2-3x,
when the steel rolling condition Dx and the roll changing condition Dy are satisfied at the same time, the support roll diameter D needs to satisfy:
D≤D2-3x；
step four: the proportion of the supporting rollers meeting the requirement of a larger working roller range is greater than or equal to that of the working rollers, otherwise, the small supporting rollers are absent, so that the increment x of the effective working layer is required to meet the following conditions:
x/（x+d2-d1）≤（D2-3x-D1）/（D2-D1）；
step five: when the increment x of the effective working layer is just satisfied, namely x/(x+d2-D1) = (D2-3 x-D1)/(D2-D1), solving the increment x of the effective working layer in the fourth step,
and (3) solving: x is x 2 +（d2-d1）x-（d2-d1）（D2-D1）=0；
Step five: let the work roll diameter increase be a, where a = kx, k be the effective coefficient; in an ideal state, k takes a value of 1; when the working roller is in a real environment, the k value is 0.3-0.9;
step six: the work roll diameter increase a is determined and calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910688526.6A CN112380634B (en) | 2019-07-29 | 2019-07-29 | Method for improving effective working layer of finish rolling working roll suitable for hot rolling old rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910688526.6A CN112380634B (en) | 2019-07-29 | 2019-07-29 | Method for improving effective working layer of finish rolling working roll suitable for hot rolling old rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112380634A CN112380634A (en) | 2021-02-19 |
| CN112380634B true CN112380634B (en) | 2024-03-01 |
Family
ID=74585909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910688526.6A Active CN112380634B (en) | 2019-07-29 | 2019-07-29 | Method for improving effective working layer of finish rolling working roll suitable for hot rolling old rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112380634B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986088A (en) * | 2006-12-22 | 2007-06-27 | 中冶南方工程技术有限公司 | Method of raising utilization rate of roll |
| CN101433918A (en) * | 2008-12-15 | 2009-05-20 | 武汉钢铁(集团)公司 | Control method for full-automatically changing work roll of hot rolling finisher |
| CN101927264A (en) * | 2009-06-23 | 2010-12-29 | 宝山钢铁股份有限公司 | Control method of local high spot of fine-rolling strip steel |
| CN102066015A (en) * | 2008-06-19 | 2011-05-18 | 西门子Vai金属科技有限公司 | Method for changing a roller in a roll mill for a continuously running steel strip |
| CN102527739A (en) * | 2011-12-29 | 2012-07-04 | 中冶南方（武汉）自动化有限公司 | Time-optimization based automatic speed control equipment and method of reversible hot mill |
| CN103056391A (en) * | 2011-10-19 | 2013-04-24 | 上海宝钢工业检测公司 | Remanufacturing method of scrap finish rolling high speed steel working roll |
| CN106180201A (en) * | 2015-04-30 | 2016-12-07 | 宝钢特钢有限公司 | Roller method and system joined online by a kind of 20 roller sendzimir mill working rolls |
| CN108144971A (en) * | 2016-12-05 | 2018-06-12 | 上海梅山钢铁股份有限公司 | It is suitable for roll profile optimization method of the six roller tandem mills with the prevention of quick-fried roller for target |
| CN109550782A (en) * | 2018-12-10 | 2019-04-02 | 北京首钢股份有限公司 | A kind of template process control method, roughing mill working roll and roughing mill |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2467877C (en) * | 1998-02-27 | 2007-10-30 | Nippon Steel Corporation | A method and a device for calibrating a rolling mill |
| US8365563B2 (en) * | 2009-11-16 | 2013-02-05 | Quad Engineering, Inc. | Methods for reducing ridge buckles and annealing stickers in cold rolled strip and ridge-flattening skin pass mill |
-
2019
- 2019-07-29 CN CN201910688526.6A patent/CN112380634B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986088A (en) * | 2006-12-22 | 2007-06-27 | 中冶南方工程技术有限公司 | Method of raising utilization rate of roll |
| CN102066015A (en) * | 2008-06-19 | 2011-05-18 | 西门子Vai金属科技有限公司 | Method for changing a roller in a roll mill for a continuously running steel strip |
| CN101433918A (en) * | 2008-12-15 | 2009-05-20 | 武汉钢铁(集团)公司 | Control method for full-automatically changing work roll of hot rolling finisher |
| CN101927264A (en) * | 2009-06-23 | 2010-12-29 | 宝山钢铁股份有限公司 | Control method of local high spot of fine-rolling strip steel |
| CN103056391A (en) * | 2011-10-19 | 2013-04-24 | 上海宝钢工业检测公司 | Remanufacturing method of scrap finish rolling high speed steel working roll |
| CN102527739A (en) * | 2011-12-29 | 2012-07-04 | 中冶南方（武汉）自动化有限公司 | Time-optimization based automatic speed control equipment and method of reversible hot mill |
| CN106180201A (en) * | 2015-04-30 | 2016-12-07 | 宝钢特钢有限公司 | Roller method and system joined online by a kind of 20 roller sendzimir mill working rolls |
| CN108144971A (en) * | 2016-12-05 | 2018-06-12 | 上海梅山钢铁股份有限公司 | It is suitable for roll profile optimization method of the six roller tandem mills with the prevention of quick-fried roller for target |
| CN109550782A (en) * | 2018-12-10 | 2019-04-02 | 北京首钢股份有限公司 | A kind of template process control method, roughing mill working roll and roughing mill |
Non-Patent Citations (2)
| Title |
|---|
| 热轧精轧轧辊辊型设计与优选;吴进等;《材料与冶金学报》(第2期);151-153 * |
| 轧钢机轧辊直径的最优化设计;康贵信等;《重型机械》(第1期);1-12 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112380634A (en) | 2021-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100551567C (en) | Control method for rolling load balance of double-motor transmission cold-strip steel rolling mill | |
| CN110385340B (en) | Rolling method and device of double-stand temper mill | |
| CN110202001A (en) | Preparation Method and milling method are matched by the roller system of ultra-thin ultra-wide stainless steel product rolling | |
| CN105251768B (en) | Rolling method of ultrathin cold-rolled tinning raw plate | |
| CN113263058A (en) | Roll shifting control method of hot continuous rolling finishing mill group considering hot roll shape | |
| CN112380634B (en) | Method for improving effective working layer of finish rolling working roll suitable for hot rolling old rolling mill | |
| CN110340149B (en) | Method for grinding a roll | |
| CN102554577A (en) | Process for manufacturing large high-chromium medium-carbon alloy forging back-up rolls | |
| CN117505548A (en) | Control method for smooth surface rolling of thin-specification double-side waves of cold continuous rolling mill | |
| CN203408983U (en) | Square tube squaring machine | |
| CN109530437A (en) | A kind of cold rolling process and stainless steel band of stainless steel band | |
| CN101637782A (en) | Method for controlling edge thinning of cold-rolled electrical steel of HC rolling mill | |
| CN109551306B (en) | Chamfering grinding method for end part of intermediate roll body of HC six-roll mill | |
| CN108393360A (en) | Method for improving surface quality of medium plate | |
| CN111530923B (en) | Production process of high-carbon steel wire rod | |
| CN113688501A (en) | Variable contact supporting roller shape design method considering rolling of plate strips with various widths | |
| CN105880299B (en) | It is a kind of to determine the method that cold rolling mill work roller moves horizontally distance | |
| CN106424138A (en) | Layout structure of universal rolling mill and rolling method | |
| CN117299816A (en) | Design method for thickness of working layer of hot rolling and finish rolling supporting roller | |
| CN112355057B (en) | Roller supporting roller for controlling edge shoulder-off and meat falling | |
| CN114669628B (en) | Method for eliminating longitudinal indentation of new roller tying machine of thermal straightening machine | |
| CN110385339A (en) | A kind of levelling method of half technique steel | |
| CN109926451A (en) | A kind of reducing rate distribution method of seamless steel pipe sizing hot rolling technology | |
| CN115625211B (en) | Plate shape control method of ultrathin galvanized aluminum magnesium cold-rolled substrate | |
| CN203791339U (en) | Fourteen-roller rolling mill |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |