CN104668287A - Universal steel rail rolling mill device and steel rail rolling method - Google Patents
Universal steel rail rolling mill device and steel rail rolling method Download PDFInfo
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- CN104668287A CN104668287A CN201410747853.1A CN201410747853A CN104668287A CN 104668287 A CN104668287 A CN 104668287A CN 201410747853 A CN201410747853 A CN 201410747853A CN 104668287 A CN104668287 A CN 104668287A
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Abstract
The invention relates to the field of steel rail rolling equipment, in particular to a universal steel rail rolling mill device and a steel rail rolling method through which 'high points' of steel rails in through-long specification size can be eliminated effectively, number of rolling mills can be reduced, and rolling cycle can be shortened. The universal steel rail rolling mill device comprises a first cogging mill, a second cogging mill, a universal roughing mill, an edging mill and a universal finishing mill, the first cogging mill and the second cogging mill are arranged solely, the universal roughing mill and the edging mill are arranged together to form a universal roughing mill set, and the universal finishing mill is arranged solely. The steel rail rolling method utilizes the universal steel rail rolling mill device. Especially, the defect of rail height 'high points' which cannot be solved through conventional technical means is overcome, stable control on the rail height 'high points' in actual product is realized, and the universal steel rail rolling mill device and the steel rail rolling method are especially suitable for being used in production of high-quality steel rails whose rail height 'high points' need to be controlled effectively.
Description
Technical field
The present invention relates to steel rail rolling apparatus field, especially a kind of steel rail universal mill device and steel rail rolling method.
Background technology
Nowadays, the arrangement of domestic and international large-scale rail factory universal mill mainly contains two kinds: 7 frames layouts and traditional 5 frames layouts.But arrange for 7 frames, have investment large, rolling rhythm is slow, and the defect that the rolling cycle is long.And traditional 5 frames are arranged, then the product quality defect that to have that rolled products surface quality is poor, size fluctuation is large etc. comparatively serious.
Meanwhile, the omnipotent traditional 5 elongated fluctuations of frame tandem rolling arrangement to rail specification show more and more obvious, even can affect the normal production of rail.The impact of the elongated dimensional accuracy of rail on operation stability is more and more outstanding, occurs that " snakelike " swings and parking of reporting to the police when described elongated size fluctuation can cause bullet train to run.Due to the defect of the rail existed in the omnipotent continuous rolling process of heavy rail high " high point ", and in steel rail rolling process, be subject to the impact of rolling mode and law of metal flow, rail is high, bottom width size fluctuation is large, and the flange of rail relevant with bottom width does not directly contact with train wheel, train operation is had an impact hardly.Rail height is the critical size affecting train operation stability, and short wavelength's irregularity as operating in bullet train is exactly that the fluctuation of rail height causes.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of " high point " can effectively eliminated on the elongated specification of rail, and simultaneously reduce milling train quantity, shortening rolling rhythm, thus more high efficiency steel rail universal mill device and the steel rail rolling method obtaining high-quality rail product.
The technical solution adopted for the present invention to solve the technical problems is: steel rail universal mill device, comprise the first blooming mill, the second blooming mill, universal roughing mill, edging mill and universal finishing mill, wherein the first blooming mill and the second blooming mill are arranged separately, universal roughing mill and edging mill are arranged together and form universal roughing mill group, and universal finishing mill is arranged separately.
Steel rail rolling method, comprises the following steps:
A, first steel billet is carried out 5-7 passage split rolling method through the first blooming mill, then steel billet is sent into the second blooming mill;
B, by the steel billet of feeding second blooming mill by the second blooming mill reciprocal rolling 3 passage, obtain mid-rail shape base;
C, the mid-rail shape base obtained sent into after universal roughing mill group carries out the reciprocal rolling of 3 passage, then send into universal finishing mill;
D, rolling 1 passage through universal finishing mill, finally roll out hot under rail finished product.
The invention has the beneficial effects as follows: when reality uses, because production process is successively through the first blooming mill, the second blooming mill, universal roughing mill group and universal finishing mill, the process rolling pass number of whole production can be allowed to reduce, rolling rhythm and rolling cycle are all more reasonable, and the surface quality of the product obtained is better.In addition, the defect solving the rail high " high point " that traditional technological means cann't be solved that the present invention is also especially good, and in actual production, achieving tracking high " high point " stability contorting, the present invention is particularly useful among the production of the high-quality rail effectively controlling rail high " high point ".
Accompanying drawing explanation
Fig. 1 is milling train layout drawing of the present invention.
Fig. 2 is traditional five stand mill layout drawing.
Fig. 3 is the schematic diagram of the rail high point value scope obtained after rolling of the present invention.
Be labeled as in figure: heating furnace 1, first blooming mill 2, second blooming mill 3, universal roughing mill 4, edging mill 5, the omnipotent unit 7 of universal finishing mill 6, three frame.
Detailed description of the invention
Steel rail universal mill device, comprise the first blooming mill 2, second blooming mill 3, universal roughing mill 4, edging mill 5 and universal finishing mill 6, wherein the first blooming mill 2 and the second blooming mill 3 are arranged separately, universal roughing mill 4 and edging mill 5 are arranged together and form universal roughing mill group, and universal finishing mill 6 is arranged separately.And the steel rail universal mill device described in utilizing carries out heat from heating furnace 1 after the steel rail rolling method of steel billet, comprise the following steps: a, first steel billet is carried out 5-7 passage split rolling method through the first blooming mill 2, then steel billet sent into the second blooming mill 3; B, by the steel billet of feeding second blooming mill 3 by the second blooming mill 3 back and forth rolling 3 passage, obtain mid-rail shape base; C, the mid-rail shape base obtained sent into after universal roughing mill group carries out the reciprocal rolling of 3 passage, then send into universal finishing mill 6; D, rolling 1 passage through universal finishing mill 6, finally roll out hot under rail finished product.General, as shown in Figure 1, form first universal roughing mill group by universal roughing mill 4, edging mill 5, and then carry out last rolling 1 passage through universal finishing mill 6 and finally roll out hot under rail finished product.
On the elongated direction of rail, local rail height is extremely higher is called " high point ", and " high point " has a strong impact on the security of operation of bullet train, is that rail for high-speed railway is given prominence to and scabrous mass defect.In currently used mode, the milling train arrangement that universal rolling rail is conventional is tandem, namely first this two framves blooming mill of blooming mill 2, second blooming mill 3 is as shown in Figure 2 arranged separately, and be reversible rolling, rolling pass is respectively 5-7 passage and 3-5 passage.3-7 frame universal mill is then arranged after two frame blooming mills.Along with improving constantly of Electric automation technology, milling train can replace on different milling train different shaped jet holes by rapid adjustment roll gap, thus makes the quantity of universal mill fewer and feweri, greatly reduces investment and production run cost.Develop into the stage that rail produced by employing three universal mills at present, the omnipotent unit 7 of three frames as shown in Figure 2.Conventional arrangement is that rail produced by three frames omnipotent unit 7 tandem rolling i.e. 3 universal mills.But the product that such production technology obtains, can form rail " high point " defect." high point " appears at from rolled piece afterbody about 3.5m and 7m, namely equal with Continuous mill train milling train spacing.The existence of " high point " makes rail on circuit there is Short wave irregularity phenomenon, and can be formed bullet train and impact, cause subgrade settlement, driving vibration and noise, improve operation cost, affect traffic safety.For ensureing rail quality, factory all adopts the mode of polishing to eliminate " high point ", and not only production efficiency is low, labour intensity large, and affects surface quality and the service life of rail.This shortcoming also just the present invention put forth effort solve technical problem.The enterprises such as Anshan iron and steel plant domestic at present, Baogang, Wuhan Iron and Steel Plant all adopt described three frames omnipotent unit 7 arrangement to produce seamed high-speed steel rail, but find that rail exists " high point " defect in the longitudinal direction when detecting flatness at end part, " high point " place's rail height of its product generally can than normal reach height about 0.4-0.6mm.
And study carefully its Producing reason, be exactly in traditional Continuous mill train, there will be the phenomenon of fast " whipping " when rolled piece departs from pass, and the oscillatory forces that " whipping " produces makes the filled with metal of next pass occur condition of instant error, this abnormal filling reflection in-orbit high direction is " high point ".The problem that the present invention will solve " high point ", just needs to look for another way, carries out creationary improvement just can realize current device.
First, merely from equipment, current omnipotent continuous rolling technology is comparatively ripe, problem that the I-steel of rolling symmetric cross-section, channel-section steel, H profile steel do not exist " high point ".Secondly, continuous section rolling significantly can reduce found the factory investment and operating cost, and therefore advanced both at home and abroad Section Steel Production factory all adopts tandem rolling mode.Traditional tandem rolling mode, owing to significantly can reduce found the factory investment and operating cost, obtains applying widely both at home and abroad at present.For the control of " high point ", in fact there is multiple mode, such as optimize lengthening coefficient at the bottom of head, adjust rational guide and guard gap, increase rolling pass and control tandem rolling tension force etc., but these modes all have respective defect, the technical scheme of solution " high point " problem can promoted in practice is produced can not be obtained.The present invention, by adjusting cleverly structure, has also taken into account the needs of the high-quality Section Steel Production such as seamed high-speed steel rail simultaneously, have found the reliable and stable method of solution " high point " problem.As shown in Figure 1, finisher is changed into layout separately to arrange separately by the first blooming mill 2 and the second blooming mill 3, universal finishing mill 6 is arranged separately, avoid the technical bottleneck of " as long as having continuous rolling relationship just to there is the possibility of rail height point ", namely under the prerequisite ensureing steel rolling quality, prevent " high point " problem that three frame omnipotent unit 7 tandem rollings in conventional solution cause, eliminate " high point " that Continuous mill train is formed, especially the scope of " high point " value is allowed to be reduced to below 0.1mm by 0.4-0.6mm, technological improvement effect is very outstanding, and the present invention also has wide marketing prospect.
Embodiment
With the manufacture craft of the rolling of 60kg/m rail, carry out further instruction the present invention.
First, choose the continuous casting billet that steel billet is 280mm × 380mm × 7750mm, heat in heating furnace, after furnace delivery table, high-pressure water descaling, send into the first blooming mill 2 rolling; Next, after 5 passage split rolling methods of the first blooming mill 2, enter reciprocal rolling 3 passes of the second blooming mill 3 and go out mid-rail shape base; Enter universal roughing mill group subsequently and carry out reciprocal rolling 3 passage; Finally rolling 1 passage in universal finishing mill 6, go out hot under rail finished product, finishing pass is without continuous rolling relationship, the operation of rolling is more stable, improve rail profile dimensional accuracy, especially for the control of rail " high point ", ensure that rail " high point " numerical value finally obtained all is less than 0.1mm, " high point " scope of the 0.4-0.6mm of the rail obtained lower than current technology.This 354 seconds average time rolling cycle of producing, 102 seconds average rolling rhythm time, not only the production cycle is shortened, and rolling rhythm is also improved.
Fig. 3 is the number range of the rail " high point " obtained after rolling of the present invention, also after describing the milling method adopting device of the present invention and correspondence fully, the fluctuation of Rail height is little, rail " high point " value is well below the scope of " high point " 0.4-0.6mm of conventional method, general, adopt the rail of this device " high point " numerical value to be all less than 0.1mm.
Claims (2)
1. steel rail universal mill device, it is characterized in that: comprise the first blooming mill (2), the second blooming mill (3), universal roughing mill (4), edging mill (5) and universal finishing mill (6), wherein the first blooming mill (2) and the second blooming mill (3) are arranged separately, universal roughing mill (4) and edging mill (5) are arranged together and form universal roughing mill group, and universal finishing mill (6) is arranged separately.
2. the steel rail rolling method utilizing the steel rail universal mill device described in claim 1 to carry out, comprises the following steps:
A, first steel billet is carried out 5-7 passage split rolling method through the first blooming mill (2), then steel billet is sent into the second blooming mill (3);
B, by the steel billet of feeding second blooming mill (3) by the second blooming mill (3) back and forth rolling 3 passage, obtain mid-rail shape base;
C, the mid-rail shape base obtained sent into after universal roughing mill group carries out the reciprocal rolling of 3 passage, then send into universal finishing mill (6);
D, rolling 1 passage through universal finishing mill (6), finally roll out hot under rail finished product.
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| CN201410747853.1A CN104668287A (en) | 2014-12-09 | 2014-12-09 | Universal steel rail rolling mill device and steel rail rolling method |
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| CN201410747853.1A CN104668287A (en) | 2014-12-09 | 2014-12-09 | Universal steel rail rolling mill device and steel rail rolling method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105414172A (en) * | 2015-12-16 | 2016-03-23 | 武汉科技大学 | Method for eliminating salient points at tail end of continuous rolled steel rail |
| CN106040749A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Rough rolling rhythm control method |
| CN106424138A (en) * | 2016-10-26 | 2017-02-22 | 攀钢集团攀枝花钢钒有限公司 | Layout structure of universal rolling mill and rolling method |
| CN111468534A (en) * | 2020-04-29 | 2020-07-31 | 山东德坊新材料科技有限公司 | High-strength light H-shaped steel and hot rolling forming process thereof |
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| US3657912A (en) * | 1968-12-09 | 1972-04-25 | Nippon Steel Corp | Universal method of rolling rails and a mill train for the same |
| GB1380302A (en) * | 1971-01-11 | 1975-01-15 | Arbed | Hotrolling process for forming girders having asymmetrical parallel flanges |
| CN101642773A (en) * | 2009-08-31 | 2010-02-10 | 攀枝花新钢钒股份有限公司 | Production line of special section wing rail and manufacturing method thereof |
| CN103071673A (en) * | 2013-02-01 | 2013-05-01 | 中冶赛迪工程技术股份有限公司 | Compact universal vertical steel rail rolling method |
| CN103978029A (en) * | 2013-12-03 | 2014-08-13 | 程向前 | Production method for once formed hot-rolling automotive girder |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3657912A (en) * | 1968-12-09 | 1972-04-25 | Nippon Steel Corp | Universal method of rolling rails and a mill train for the same |
| GB1380302A (en) * | 1971-01-11 | 1975-01-15 | Arbed | Hotrolling process for forming girders having asymmetrical parallel flanges |
| CN101642773A (en) * | 2009-08-31 | 2010-02-10 | 攀枝花新钢钒股份有限公司 | Production line of special section wing rail and manufacturing method thereof |
| CN103071673A (en) * | 2013-02-01 | 2013-05-01 | 中冶赛迪工程技术股份有限公司 | Compact universal vertical steel rail rolling method |
| CN103978029A (en) * | 2013-12-03 | 2014-08-13 | 程向前 | Production method for once formed hot-rolling automotive girder |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105414172A (en) * | 2015-12-16 | 2016-03-23 | 武汉科技大学 | Method for eliminating salient points at tail end of continuous rolled steel rail |
| CN106040749A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Rough rolling rhythm control method |
| CN106040749B (en) * | 2016-06-21 | 2018-06-22 | 首钢京唐钢铁联合有限责任公司 | A kind of roughing mill pace control method |
| CN106424138A (en) * | 2016-10-26 | 2017-02-22 | 攀钢集团攀枝花钢钒有限公司 | Layout structure of universal rolling mill and rolling method |
| CN111468534A (en) * | 2020-04-29 | 2020-07-31 | 山东德坊新材料科技有限公司 | High-strength light H-shaped steel and hot rolling forming process thereof |
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Application publication date: 20150603 |
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