CN101602164A - Rail straghtener - Google Patents
Rail straghtener Download PDFInfo
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- CN101602164A CN101602164A CNA2009103046006A CN200910304600A CN101602164A CN 101602164 A CN101602164 A CN 101602164A CN A2009103046006 A CNA2009103046006 A CN A2009103046006A CN 200910304600 A CN200910304600 A CN 200910304600A CN 101602164 A CN101602164 A CN 101602164A
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- rail
- roll
- cold
- straightening
- straghtener
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Abstract
The invention discloses a kind of novel rail straghtener that can effectively improve steel rail straightening blind area, avoid the straightening blind area excision is caused the production waste.This straightener comprises the smoothing roll system that is arranged on the body, being positioned at smoothing roll on described body is that output also is provided with the cold roll system that is made up of perpendicular to the cold roll of rail traffic direction up and down at least one pair of line of centres, and this is to forming the roll gap that rail is passed through at interval between the cold roll.Thereby the cold-rolling equipment of setting up on existing rail straghtener of the invention constitutes a kind of novel rail straghtener, carry out cold rolling perpendicular to the cold roll of rail traffic direction to the rail behind smoothing roll system aligning up and down by at least one pair of line of centres in this cold roll equipment, thereby reduce the rail height of steel rail straightening blind area, effectively improve even eliminated the high difference of rail in steel rail straightening blind area and steel rail straightening district, high elongated fluctuation also can be played the effect of correction to the rail rail simultaneously.
Description
Technical field
The present invention relates to a kind of rail straghtener.
Background technology
Also to align after the steel rail rolling moulding.Existing rail straghtener comprises the smoothing roll system that is made up of upper straightening roll group and following smoothing roll group, and the following smoothing roll in upper straightening roll in the described upper straightening roll group and the following smoothing roll group is crisscross arranged along the rail traffic direction.Because described upper straightening roll and play smoothing roll are crisscross arranged, so rail is when by smoothing roll being, the two ends of rail can't 3 force balances, and there is straightening blind area all the time in the two ends of rail so align afterwards.The straightening blind area of rail exceeds 0.4～0.6 millimeter than steel rail straightening district rail height, the web of the rail is wide to go out 0.2 millimeter, bottom width is wide to go out 0.1 millimeter, so the existence of steel rail straightening blind area not only causes rail specification not conform to, and has a strong impact on the glacing flatness at rail two ends.The way of improving steel rail straightening blind area at present only reduces a kind of mode of straightener pitch.Can influence leveling effect but too reduce pitch, therefore improve steel rail straightening blind area in this way and lose more than gain.Reality can only be selected the straightening blind area of rail is excised in producing.Present because of the lumber recovery that excision the caused loss to steel rail straightening blind area has reached about 3%, as produce 1000000 tons of rail per year and need cut useless 30,000 tons, economic loss reaches more than 1.5 hundred million yuan.
In sum, rail exists the problem of straightening blind area to bring serious production waste, though this problem exists always, does not have effective solution all the time.
Summary of the invention
Technical problem solved by the invention is: a kind of novel rail straghtener that can effectively improve steel rail straightening blind area is provided, avoids the straightening blind area excision is caused the production waste.
For solving the problems of the technologies described above, this novel rail straghtener provided by the present invention comprises the smoothing roll system that is arranged on the body, being positioned at smoothing roll on described body is that output also is provided with the cold roll system that is made up of perpendicular to the cold roll of rail traffic direction up and down at least one pair of line of centres, and this is to forming the roll gap that rail is passed through at interval between the cold roll.
The invention has the beneficial effects as follows: thus the cold-rolling equipment of setting up on existing rail straghtener of the invention constitutes a kind of novel rail straghtener, carry out cold rolling perpendicular to the cold roll of rail traffic direction to the rail behind smoothing roll system aligning up and down by at least one pair of line of centres in this cold roll equipment, thereby reduce the rail height of steel rail straightening blind area, effectively improve even eliminated the high difference of rail in steel rail straightening blind area and steel rail straightening district, high elongated fluctuation also can be played the effect of correction to the rail rail simultaneously.Test shows, adopt rail straghtener of the present invention can make the specification of steel rail straightening blind area and the level that glacing flatness reaches the aligning district, and indexs such as the residual stress of steel rail straightening blind area, fracture toughness also fully with the aligning district quite even be better than the aligning district, make rail satisfy instructions for use fully, it is long-standing because of the high problem of lumber recovery that straightening blind area causes loss to efficiently solve the Rail Production field.
Description of drawings
Fig. 1 is the structural representation of rail straghtener of the present invention.
Direction shown in the arrow is the rail direction of motion among Fig. 1.
Be labeled as among the figure: body 1, smoothing roll are 2, upper straightening roll group 21, upper straightening roll 211, down smoothing roll group 22, down smoothing roll 221, cold roll be 3, cold roll 31, cold roll 32, rail 4.
The specific embodiment
The present invention is described further below in conjunction with drawings and Examples.
As shown in Figure 1, this rail straghtener comprises that the smoothing roll that is arranged on the body 1 is 2, being positioned at smoothing roll and being 2 outputs on described body 1, also to be provided with by at least one pair of line of centres be 3 perpendicular to cold roll 31,32 cold rolls of being formed of rail 4 traffic directions up and down, and this is to forming the roll gap that rail 4 is passed through at interval between the cold roll 31,32.Wherein, smoothing roll is 2 to be existing structures, is made up of upper straightening roll group 21 and play smoothing roll group 22, and upper straightening roll 211 in the described upper straightening roll group 21 and the following smoothing roll 221 in the following smoothing roll group 22 are crisscross arranged along rail 4 traffic directions.Because the high difference of rail is the subject matter that straightening blind area brings, it is the principal element of decision rail precision and glacing flatness, therefore the present invention is directed to steel rail straightening blind area and the high difference of rail of aligning the district, by this cold roll is that at least one pair of line of centres in 3 is up and down perpendicular to the cold roll 31 of rail traffic direction, 32 pairs through smoothing roll be 2 the aligning after rail 4 carry out cold rolling, thereby reduce the rail height of steel rail straightening blind area, effectively improve even eliminated the high difference of rail in steel rail straightening blind area and steel rail straightening district, high elongated fluctuation also can be played the effect of correction to the rail rail simultaneously, makes the specification of straightening blind area and the level that glacing flatness reaches the aligning district.
Moreover, adopt rail straghtener of the present invention to align after, also can bring unexpected effect to the performance indications of rail.Cold rollingly cause the rolled piece toughness index to descend by continuous cold deformation meeting, therefore for this performance requirement high product of rail, those skilled in the art generally can not expect behind aligning further cold rolling to rail.Yet, compare with steel rail straightening owing to cold rolling, cold rolling influence to the rail toughness index is on the contrary less than aligning, and the rail of the present invention after to aligning carry out cold rolling in fact main be exactly that straightening blind area to rail is rolled, therefore as long as cold rolling reduction is controlled at reasonable range, indexs such as the residual stress of the straightening blind area of rail after cold rolling, fracture toughness are intact even also can be better than the aligning district, the overall performance of therefore cold rolling back rail does not only descend, increase on the contrary, make rail satisfy instructions for use fully.
In order to eliminate the high difference of rail in steel rail straightening blind area and steel rail straightening district fully, the height of described roll gap equals the high value of rail in rail 4 its steel rail straightening district after smoothing roll is 2 alignings.Behind the steel rail straightening, rail is high can be reduced.In general, the rail height in its aligning district can reduce about 0.3～0.7 millimeter behind the steel rail straightening before aligning.Therefore, can before aligning, detect by the rail height to rail 4, after being 2 alignings, smoothing roll again the rail height in its central straightening deformation district is detected when rail 4 then, the two difference is exactly the rail high compression value of rail 4 through aligning district, aligning back, determine that according to this difference cold roll is a drafts of going up cold roll in 3 then, making cold roll is that the drafts of going up cold roll in 3 equals the high difference of rail, thereby guarantee that cold roll is that to equal rail 4 be the rail high value in its steel rail straightening district, 2 aligning back through smoothing roll for roll gap height in 3, make the high generation of the rail compression of the straightening blind area of rail 4, reach unanimity with steel rail straightening district rail height, eliminate the high difference of rail in steel rail straightening blind area and steel rail straightening district fully.
In order to guarantee the glacing flatness of rail 4, prevent from when cold rolling that rail 4 produces to go up curvedly or curved down that the diameter of described at least one pair of cold roll 31,32 is consistent with the rotating speed size.In addition, because the cold roll of unlike material can satisfy the requirement difference of roll strength, as the little roll of the optional diameter of steel rider, iron roll then selects the big roll of diameter.The diameter of at least one pair of cold roll 31,32 can be set at 400～600 millimeters, like this no matter the roll of which kind of material can both satisfy the requirement of roll strength.
In addition, glue iron scale in order to prevent roll, the material of described at least one pair of cold roll 31,32 is high-chromium alloy cast-iron.The high-chromium alloy cast-iron roll is owing to contain chromium, so the intensity height, again owing to carbon content height in the material, lubricate is so be difficult for sticking iron sheet.
Embodiment 1
Adopting rail straghtener of the present invention is that 60 heavy rails of U75V are aligned test to material, being positioned at smoothing roll in this straightener is the diameter selection requirement unanimity of the cold roll 31,32 of 2 outputs, be 400～600 millimeters, power of motor is 500KW, the rotating speed of described cold roll 31,32 requires consistent, and roll material is high-chromium alloy cast-iron.Roll gap between the cold roll 31,32 is depressed to hydraulic pressure and is depressed, the value of depressing is 2 millimeters, and cold rolling back straightening blind area specification and flatness at end part reach the level of aligning the district, and it is 186Mpa that row detection residual stress is sent in the back sampling to, less than rail in high speed railway standard 250Mpa, fracture toughness K
1CSingle minimum of a value is 32Mpa.m
1/2, greater than the 26Mpa.m of rail in high speed railway standard
1/2
Embodiment 2
Adopting rail straghtener of the present invention is that 60 heavy rails of U71Mn are aligned test to aligning the back material, being positioned at smoothing roll in this straightener is the diameter selection requirement unanimity of the cold roll 31,32 of 2 outputs, be 400～600 millimeters, power of motor is 500KW, the rotating speed of described cold roll 31,32 requires consistent, and roll material is high-chromium alloy cast-iron.Roll gap between the cold roll 31,32 is depressed to hydraulic pressure and is depressed, the value of depressing is 2 millimeters, and cold rolling back straightening blind area specification and flatness at end part reach the level of aligning the district, and it is 178Mpa that row detection residual stress is sent in the back sampling to, less than rail in high speed railway standard 250Mpa, fracture toughness K
1CSingle minimum of a value is 37Mpa.m
1/2, greater than the 26Mpa.m of rail in high speed railway standard
1/2
Claims (5)
1. rail straghtener, comprise the smoothing roll system (2) that is arranged on the body (1), it is characterized in that: be positioned at smoothing roll system (2) output and also be provided with the cold roll system (3) that is made up of perpendicular to the cold roll (31,32) of rail (4) traffic direction up and down at least one pair of line of centres on described body (1), this is to forming the roll gap that rail (4) is passed through at interval between the cold roll (31,32).
2. rail straghtener as claimed in claim 1 is characterized in that: the diameter of described at least one pair of cold roll (31,32) is consistent with the rotating speed size.
3. rail straghtener as claimed in claim 1 or 2 is characterized in that: the diameter of described at least one pair of cold roll (31,32) is 400～600 millimeters.
4. rail straghtener as claimed in claim 1 or 2 is characterized in that: the material of described at least one pair of cold roll (31,32) is high-chromium alloy cast-iron.
5. rail straghtener as claimed in claim 1 or 2 is characterized in that: the height of described roll gap equals the high value of rail in rail (4) its steel rail straightening district behind smoothing roll system (2) aligning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103046006A CN101602164A (en) | 2009-07-21 | 2009-07-21 | Rail straghtener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103046006A CN101602164A (en) | 2009-07-21 | 2009-07-21 | Rail straghtener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101602164A true CN101602164A (en) | 2009-12-16 |
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ID=41468136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009103046006A Pending CN101602164A (en) | 2009-07-21 | 2009-07-21 | Rail straghtener |
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| CN (1) | CN101602164A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056198A (en) * | 2012-09-26 | 2013-04-24 | 攀钢集团攀枝花钢钒有限公司 | Speed regulating method and system of straightening roller of vertical roller type straightener |
| CN103056199A (en) * | 2012-09-26 | 2013-04-24 | 攀钢集团攀枝花钢钒有限公司 | Method and system for adjusting and controlling speed of strengthening roll of horizontal roll type straightening machine |
| CN104368636A (en) * | 2014-10-21 | 2015-02-25 | 安徽大为汽车配件有限公司 | Fixture special for straightening and correcting vehicle door profile |
| CN105728503A (en) * | 2016-03-08 | 2016-07-06 | 攀钢集团攀枝花钢钒有限公司 | Device arrangement structure capable of improving uniformity of after-straightened section of steel rail |
-
2009
- 2009-07-21 CN CNA2009103046006A patent/CN101602164A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056198A (en) * | 2012-09-26 | 2013-04-24 | 攀钢集团攀枝花钢钒有限公司 | Speed regulating method and system of straightening roller of vertical roller type straightener |
| CN103056199A (en) * | 2012-09-26 | 2013-04-24 | 攀钢集团攀枝花钢钒有限公司 | Method and system for adjusting and controlling speed of strengthening roll of horizontal roll type straightening machine |
| CN103056198B (en) * | 2012-09-26 | 2015-03-04 | 攀钢集团攀枝花钢钒有限公司 | Speed regulating method and system of straightening roller of vertical roller type straightener |
| CN103056199B (en) * | 2012-09-26 | 2015-06-03 | 攀钢集团攀枝花钢钒有限公司 | Method and system for adjusting and controlling speed of strengthening roll of horizontal roll type straightening machine |
| CN104368636A (en) * | 2014-10-21 | 2015-02-25 | 安徽大为汽车配件有限公司 | Fixture special for straightening and correcting vehicle door profile |
| CN105728503A (en) * | 2016-03-08 | 2016-07-06 | 攀钢集团攀枝花钢钒有限公司 | Device arrangement structure capable of improving uniformity of after-straightened section of steel rail |
| CN105728503B (en) * | 2016-03-08 | 2018-04-13 | 攀钢集团攀枝花钢钒有限公司 | Improve rail and rectify rear homogeneity of fault plane device arrangement |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091216 |