CN104148380A - Method for rolling rods with 150 square blanks and 165 square blanks through both rough rolling and intermediate rolling - Google Patents
Method for rolling rods with 150 square blanks and 165 square blanks through both rough rolling and intermediate rolling Download PDFInfo
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- CN104148380A CN104148380A CN201410420132.XA CN201410420132A CN104148380A CN 104148380 A CN104148380 A CN 104148380A CN 201410420132 A CN201410420132 A CN 201410420132A CN 104148380 A CN104148380 A CN 104148380A
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Abstract
The invention discloses a method for rolling rods with 150 square blanks and 165 square blanks through both rough rolling and intermediate rolling. According to the method, six rough rolling mills and four to six intermediate rolling mills are used, wherein no-groove rolling is adopted by the rough rolling mills from t1# to 5#, round hole rolling is adopted by the 6# rough rolling mill, round-oval hole rolling is adopted by the intermediate rolling mills, when five intermediate rolling mills are adopted, the 7# intermediate rolling mill idles, and when six intermediate rolling mills are adopted, the 7# intermediate rolling mill and the 8# intermediate rolling mill idle. According to the method, no-groove rolling is adopted by the racks from 1# to 5#, and the rough rolling hole type and the intermediate rolling hole type are combined into one series; original 12 hole type passes are reduced to 10 passes by changing extending coefficients, the intermediate rolling speed is increased through the speed reduction ratio advantage of the racks from 9# to 12#, and the rotating speed limitation problem is solved; matched rollers of the rolling mills from 1# to 5# are rationalized, and common use of both rough rolling and intermediate rolling is achieved; by adjusting the size and the structure of a sliding guiding and guarding device, all the specifications are in common use. The method has the advantages of being simple, efficient and capable of making replacement easy to perform.
Description
Technical field
The invention belongs to technical field of steel rolling, be specifically related to a kind of simple to operate, cost is low, production efficiency is high, changing the outfit is easy in thick with 150 and 165 square billets roll the method that shares rolled bar material.
Background technology
Pass design is a very important job during steel rolling is produced, pass schedule rationally whether, the correctness of pass design, is directly determining Yield and quality, the lumber recovery of product, and the carrying out smoothly of cost, operating rate and production.Pass design is unreasonable, can cause pass schedule complicated, and transitinal pass kind is too much, makes production cost high, the spare part such as roll and guide and guards kind is many, and occupancy is large, and consumption is large, and occupied fund is many, labor strength is large, and management and operating difficulties, easily cause confusion; And while changing kind, roll change amount is large, the time is long, makes production operational availability low; And while changing kind time long, affected the flexibility of product variety replacing, production & marketing bad adaptability.
The common roughing of bar rolling from Φ 12mm to Φ 28mm specification is 6 rolling mills, as adopt 3 550 milling trains and 3 500 milling trains to form, middle milling train is 6 rolling mills, as adopt 6 420 milling trains, the pass schedule side of being generally---circle and circle---elliptic system, wherein rolling Φ 12mm rolls need minute three series, series of each specification of finish rolling, rolling 165mm * 165mm and series of 150mm * 150mm square billet roughing in Φ 28mm specification.Above pair rolling method cause pass and guide and guard series various, sliver process equipment reserve level is too large, takies a large amount of inventory finances; For coordinating the market demand, Bar Rolling Line needs the frequent kind of changing, and changing kind, to change frame many, the waste plenty of time; Series is more, Roller Machining (turning amount is large), and the workloads such as guide and guard assembling, technique adjustment are large, waste of manpower and financial resources cost; Roll change is frequent, and the proof technology accident such as too much easily skid, causes the waste products such as dimension overproof; Due to the constraint of series to guide and guard, material shape, after the many cuttings of bar transformation, in to roll rotating speed limited, the performance of constraint production capacity.
Summary of the invention
For solving the deficiency of above existence, the object of the present invention is to provide a kind of simple to operate, cost is low, production efficiency is high, changing the outfit is easy in thick with 150 and 165 square billets roll the method that shares rolled bar material.
The object of the present invention is achieved like this: comprise roughing 6 rolling mills and in roll 4～6 rolling mills, 1#～5# roughing milling train adopts grooveless rolling, 6# roughing milling train adopts circular hole rolling, in milling train adopt circle---oval groove rolling, the empty mistake of milling train in 7# in adopting 5 during milling train, the empty mistake of milling train in 7# in adopting 6 during milling train and 8#, 6# roughing milling train when rolling 150 square billets and 165 square billet and in roll design of section of rolling mill and share.
The present invention is by changing pass schedule before roughing 5# frame into slotless, utilize grooveless rolling lengthening coefficient than the feature of large 1.01～1.08 times of groove rolling, by the change of lengthening coefficient, in will be thick, roll pass schedule and merge into series of slotless-circle-oval groove, thereby realize many specifications finished product, to roll pass in thick shared; Further, by the distribution of depressing of roughing 165mm * 165mm and two specification square billets of 150mm * 150mm, appropriate design 1#～5# frame is joined roller, makes it realization and joins sharing of roller; Further, by the size of sliding guide and the adjustment of structure, realize sharing of all specification sliding guides.By above measure, the change of rolling by lengthening coefficient during former 12 pass passages are thick is reduced to 10 passages, has simplified operation, has reduced production cost; By pass, join sharing of roller and guide and guard, make thick in roll process spare part reserve level than original, reduce 60%, significantly reduced time and the working strength of while changing kind, hanging roll change; Utilize in the raising of 9～12# frame speed reducing ratio advantage simultaneously and roll speed, solve rotating speed restricted problem, thereby improve production capacity.The present invention have structure and simple to operate, produce efficient, easy feature changes the outfit.
Accompanying drawing explanation
Fig. 1 is sliding guide structural representation of the present invention;
Fig. 2 is the top view of Fig. 1;
In figure: 1-wear-resistant slide block, 2-is by adjusting bolt, 3-base.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated, but never in any form the present invention is limited, and any conversion or the replacement based on training centre of the present invention, done, all belong to protection scope of the present invention.
The present invention includes roughing 6 rolling mills and in roll 4～6 rolling mills, 1#～5# roughing milling train adopts grooveless rolling, 6# roughing milling train adopts circular hole rolling, in milling train adopt circle---oval groove rolling, the empty mistake of milling train in 7# in adopting 5 during milling train, the empty mistake of milling train in 7# in adopting 6 during milling train and 8#, 6# roughing milling train when rolling 150 square billets and 165 square billet and in roll design of section of rolling mill and share.
It is D that described 1#～5# roughing rolling-mill housing is joined roller
work(working roll footpath)+H
material(material type height)≤D
max, wherein:
D
work---working roll footpath,
H
material---material type height,
D
max---milling train allows big roller footpath.
The sliding guide guide groove of described slotless groove rolling milling train and circular hole rolling milling train is of a size of:
Guide groove height H
lead=H
material+ 8K mm,
Guide groove width B
lead=B
material+ 10K mm,
H
material---material type height,
K---guide groove gap factor, slotless gets 1 ~ 3.5, and groove rolling gets 0.2 ~ 2.0,
B
material---material molded breadth degree.
Described 1#～3# roughing milling train is 550 milling trains, and 4#～6# roughing milling train is 500 milling trains, in milling train be 420 milling trains.
The roll gap height of 1#～5# roughing milling train of rolling 150 square billets is respectively 112mm, 118mm, 73mm, 88mm, 57mm; The roll gap height of 1#～5# roughing milling train of rolling 165 square billets is respectively 115mm, 122mm, 75mm, 88mm, 59mm.
The lengthening coefficient of 1#～5# roughing milling train of described rolling 150 square billets is respectively 1.275,1.289,1.44,1.338,1.334; The lengthening coefficient of 1#～5# roughing milling train of rolling 165 square billets is respectively 1.31,1.42,1.2,1.342,1.299.
The pass height of the 6# roughing milling train of described rolling 150 square billets and 165 square billets is 74mm, and pass width is 76mm.
When in described, milling train is 6, it is oval, round, oval, vertical ellipse that the pass of 9#～12# is respectively; In described 9#, rolling design of section of rolling mill height is 45mm, pass width 80mm; In described 10#, rolling design of section of rolling mill height is 50mm, pass width 52mm; In described 11#, rolling design of section of rolling mill height is 31mm, pass width 72mm; In described 12#, rolling design of section of rolling mill height is 52.8mm, pass width 36.5mm.
In described 7#～12#, the speed ratio of milling train is respectively 10.67,7.653,6.495,5.251,3.897,3.021.
The working roll footpath D of described 1#～3# roughing milling train
workbe φ 515mm to the maximum, minimum φ 465mm; The working roll footpath D of described 4# roughing milling train
workbe φ 470mm to the maximum, minimum φ 415mm; The working roll footpath D of described 5# roughing milling train
workbe φ 510mm to the maximum, minimum φ 415mm.
As illustrated in fig. 1 and 2, the wear-resistant slide block 1 that described sliding guide is inlayed by base 3 and opening one or both sides thereof forms, described wear-resistant slide block 1 by regulate adjustment bolt 2 through base 3 sidewalls in base 3 sidewall inlaid holes in opposite directions or deviate from mobile to regulate guide and guard openings of sizes.
embodiment 1
The roughing of Kun Gang Red River iron company is 3 550 milling trains and 3 500 milling trains, middle milling train is that 6 420 milling trains form, the pass schedule side of being-circle and circle-elliptic system, from Φ 12mm to Φ 28mm specification, roll minute three series, series of each specification of finish rolling, rolling 165mm * 165mm and series of 150mm * 150mm blank coarse rolling, there is following problem in former process program:
1), former technique pass and guide and guard series various, sliver process equipment reserve level is too large, takies a large amount of inventory finances;
2), for coordinating the market demand, Bar Rolling Line needs the frequent kind of changing, changing kind, to change frame many, the waste plenty of time;
3), series more, Roller Machining (turning amount is large), the workloads such as guide and guard assembling, technique adjustment are large, waste of manpower and financial resources cost;
4), roll change is frequent, the proof technology accident such as too much easily skid, causes the waste products such as dimension overproof;
5), due to the constraint of series to guide and guard, material shape, after the many cuttings of bar transformation, in to roll rotating speed limited, the performance of constraint production capacity.
According to above deficiency, taked following measures:
1), pass shares: pass schedule adopts slotless-circle-oval groove system.Change pass schedule before roughing 5# frame into slotless, utilize grooveless rolling to extend the feature of large (lengthening coefficient is than large 1.01～1.08 times of groove rolling), by the change (changing the size of material type) of lengthening coefficient, by rolling pass schedule in thick, merge into a series; Meanwhile, by the suitable adjustment (in Table 3) of percentage elongation, realize two specification square billet 6# of 165mm * 165mm and 150mm * 150mm, many specifications of 8#～12# pass shares and meet rolling requirement, share rolling material type in Table 1.
2), equipment shares: according to blank, depress distributions (in Table 1), utilization D
work(working roll footpath)+H
material(expecting high)≤Dmax(milling train allows big roller footpath) principle, design 1#～5# frame is joined roller and is shared (in Table 2) and meet equipment requirement;
3), spare part shares: according to the material shape of each specification, according to H
material(expecting high)+8Kmm, B(material is wide)+10Kmm, K value (getting 0.2 ~ 3.5) is determined according to material type shape and depth-width ratio, is designed and produced sliding guide (as Fig. 2), by changing the size adjustment guide and guard opening of wear-resistant slide block, the equipment of finally realizing all specifications shares.
Roll process common parameter table during table 1 is thick
Table 2 1#～5# frame working roll footpath scope
Milling train important technological parameters in table 3
By above measure, obtained following effect:
1) thick middle roll process spare part reserve level reduces 60% than original;
2) significantly reduced the time of hanging roll change while changing kind, annual saving adjusted roll changing time approximately 150 hours, creates every year profit approximately 3,600,000;
3) by 12 original pass passages, the change by lengthening coefficient is reduced to 10 passages, utilizes 9#～12# frame speed reducing ratio advantage, rolling mill speed in raising, solve rotating speed restricted problem, significantly promote production capacity, make design produce the Bar Rolling Line of 800,000 tons per year, broken through 1,150,000 tons;
4) simplified significantly operation, all kinds of technology accidents significantly reduce, and within 2012, the annual finished product rate of bar has reached 101.64%.
Claims (10)
1. one kind is rolled the method that shares rolled bar material in thick with 150 and 165 square billets, comprise roughing 6 rolling mills and in roll 4～6 rolling mills, it is characterized in that 1#～5# roughing milling train adopts grooveless rolling, 6# roughing milling train adopts circular hole rolling, in milling train adopt circle---oval groove rolling, the empty mistake of milling train in 7# in adopting 5 during milling train, the empty mistake of milling train in 7# in adopting 6 during milling train and 8#, 6# roughing milling train when rolling 150 square billets and 165 square billet and in roll design of section of rolling mill and share.
2. the method for rolled bar material according to claim 1, is characterized in that it is D that described 1#～5# roughing rolling-mill housing is joined roller
work(working roll footpath)+H
material(material type height)≤D
max, wherein:
D
work---working roll footpath,
H
material---material type height,
D
max---milling train allows big roller footpath.
3. the method for rolled bar material according to claim 1, is characterized in that the sliding guide guide groove of described slotless groove rolling milling train and circular hole rolling milling train is of a size of:
Guide groove height H
lead=H
material+ 8K mm,
Guide groove width B
lead=B
material+ 10K mm,
H
material---material type height,
K---guide groove gap factor, slotless gets 1 ~ 3.5, and groove rolling gets 0.2 ~ 2.0,
B
material---material molded breadth degree.
4. the method for rolled bar material according to claim 1, is characterized in that 1#～3# roughing milling train is 550 milling trains, and 4#～6# roughing milling train is 500 milling trains, in milling train be 420 milling trains.
5. according to the method for rolled bar material described in claim 1 or 4, it is characterized in that the roll gap height of 1#～5# roughing milling train of rolling 150 square billets is respectively 112mm, 118mm, 73mm, 88mm, 57mm; The roll gap height of 1#～5# roughing milling train of rolling 165 square billets is respectively 115mm, 122mm, 75mm, 88mm, 59mm.
6. the method for rolled bar material according to claim 5, is characterized in that the lengthening coefficient of 1#～5# roughing milling train of described rolling 150 square billets is respectively 1.275,1.289,1.44,1.338,1.334; The lengthening coefficient of 1#～5# roughing milling train of rolling 165 square billets is respectively 1.31,1.42,1.2,1.342,1.299.
7. the method for rolled bar material according to claim 5, is characterized in that the pass height of the 6# roughing milling train of rolling 150 square billets and 165 square billets is 74mm, and pass width is 76mm.
8. according to the method for rolled bar material described in claim 1 or 4, it is characterized in that described in milling train while being 6, the pass of 9#～12# is respectively oval, circle, oval, vertical ellipse; In described 9#, rolling design of section of rolling mill height is 45mm, pass width 80mm; In described 10#, rolling design of section of rolling mill height is 50mm, pass width 52mm; In described 11#, rolling design of section of rolling mill height is 31mm, pass width 72mm; In described 12#, rolling design of section of rolling mill height is 52.8mm, pass width 36.5mm.
9. the method for rolled bar material according to claim 8, is characterized in that in 7#～12#, the speed ratio of milling train is respectively 10.67,7.653,6.495,5.251,3.897,3.021.
10. according to the method for rolled bar material described in claim 1 or 2, it is characterized in that the working roll footpath D of described 1#～3# roughing milling train
workbe φ 515mm to the maximum, minimum φ 465mm; The working roll footpath D of described 4# roughing milling train
workbe φ 470mm to the maximum, minimum φ 415mm; The working roll footpath D of described 5# roughing milling train
workbe φ 510mm to the maximum, minimum φ 415mm.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108430659A (en) * | 2016-01-07 | 2018-08-21 | 新日铁住金株式会社 | The manufacturing method and rolling device of H profile steel |
| CN108941217A (en) * | 2018-06-14 | 2018-12-07 | 本钢板材股份有限公司 | A kind of optimization method of steel rolling line inlet guide |
| CN111644461A (en) * | 2020-05-25 | 2020-09-11 | 山东莱钢永锋钢铁有限公司 | Rolling method of rolling equipment |
| CN111842480A (en) * | 2020-07-08 | 2020-10-30 | 鞍钢股份有限公司 | Adjusting method for rolling wire rod product with specification phi of 12.3mm by double-pass system |
| CN112296085A (en) * | 2020-08-14 | 2021-02-02 | 陕钢集团汉中钢铁有限责任公司 | Rough rolling type system for rolling 165 square billets |
| CN113351643A (en) * | 2021-04-23 | 2021-09-07 | 陕钢集团产业创新研究院有限公司 | Rolling method for rapidly switching 150 and 165 square billets in bar and wire steel rolling production |
| CN114147075A (en) * | 2021-04-23 | 2022-03-08 | 红河钢铁有限公司 | Method for rolling wire rod product by using 150 and 160 square blanks together |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61286002A (en) * | 1985-06-14 | 1986-12-16 | Nippon Kokan Kk <Nkk> | Rough rolling method for steel rod and wire |
| JPH03133511A (en) * | 1990-03-16 | 1991-06-06 | Kawasaki Steel Corp | Inlet port guide for flat roll rolling of bar steel/wire rod |
| CN101168166A (en) * | 2007-09-28 | 2008-04-30 | 江苏沙钢集团有限公司 | Improved technique for morgan phi 7mm hole type system |
| CN101543835A (en) * | 2008-03-24 | 2009-09-30 | 宝山钢铁股份有限公司 | Rolling method for idle-away of single machine frame of high-speed wire roughing mill |
| CN202910071U (en) * | 2012-09-29 | 2013-05-01 | 河北唐银钢铁有限公司 | 12mm screw thread four-splitting intermediate and finish rolling pass structure for bar continuous rolling |
| CN203316478U (en) * | 2013-07-01 | 2013-12-04 | 中冶赛迪工程技术股份有限公司 | High-speed wire rod compact type imporous rolling production line |
-
2014
- 2014-08-25 CN CN201410420132.XA patent/CN104148380B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61286002A (en) * | 1985-06-14 | 1986-12-16 | Nippon Kokan Kk <Nkk> | Rough rolling method for steel rod and wire |
| JPH03133511A (en) * | 1990-03-16 | 1991-06-06 | Kawasaki Steel Corp | Inlet port guide for flat roll rolling of bar steel/wire rod |
| CN101168166A (en) * | 2007-09-28 | 2008-04-30 | 江苏沙钢集团有限公司 | Improved technique for morgan phi 7mm hole type system |
| CN101543835A (en) * | 2008-03-24 | 2009-09-30 | 宝山钢铁股份有限公司 | Rolling method for idle-away of single machine frame of high-speed wire roughing mill |
| CN202910071U (en) * | 2012-09-29 | 2013-05-01 | 河北唐银钢铁有限公司 | 12mm screw thread four-splitting intermediate and finish rolling pass structure for bar continuous rolling |
| CN203316478U (en) * | 2013-07-01 | 2013-12-04 | 中冶赛迪工程技术股份有限公司 | High-speed wire rod compact type imporous rolling production line |
Non-Patent Citations (2)
| Title |
|---|
| 何斌强等: "棒线粗中轧孔型共用的工艺设计与应用", 《轧钢》 * |
| 黄文初: "可调组合式滑动进口导卫装置设计与应用", 《轧钢》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108430659A (en) * | 2016-01-07 | 2018-08-21 | 新日铁住金株式会社 | The manufacturing method and rolling device of H profile steel |
| CN108430659B (en) * | 2016-01-07 | 2020-01-10 | 日本制铁株式会社 | Method for producing H-shaped steel and rolling device |
| CN108941217A (en) * | 2018-06-14 | 2018-12-07 | 本钢板材股份有限公司 | A kind of optimization method of steel rolling line inlet guide |
| CN111644461A (en) * | 2020-05-25 | 2020-09-11 | 山东莱钢永锋钢铁有限公司 | Rolling method of rolling equipment |
| CN111842480A (en) * | 2020-07-08 | 2020-10-30 | 鞍钢股份有限公司 | Adjusting method for rolling wire rod product with specification phi of 12.3mm by double-pass system |
| CN112296085A (en) * | 2020-08-14 | 2021-02-02 | 陕钢集团汉中钢铁有限责任公司 | Rough rolling type system for rolling 165 square billets |
| CN113351643A (en) * | 2021-04-23 | 2021-09-07 | 陕钢集团产业创新研究院有限公司 | Rolling method for rapidly switching 150 and 165 square billets in bar and wire steel rolling production |
| CN114147075A (en) * | 2021-04-23 | 2022-03-08 | 红河钢铁有限公司 | Method for rolling wire rod product by using 150 and 160 square blanks together |
| CN113351643B (en) * | 2021-04-23 | 2022-12-02 | 陕钢集团产业创新研究院有限公司 | Rolling method for rapidly switching 150 and 165 square billets in bar and wire steel rolling production |
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