CN201432200Y - Rail straightener - Google Patents
Rail straightener Download PDFInfo
- Publication number
- CN201432200Y CN201432200Y CN2009203065661U CN200920306566U CN201432200Y CN 201432200 Y CN201432200 Y CN 201432200Y CN 2009203065661 U CN2009203065661 U CN 2009203065661U CN 200920306566 U CN200920306566 U CN 200920306566U CN 201432200 Y CN201432200 Y CN 201432200Y
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- China
- Prior art keywords
- rail
- straightening
- roll
- cold
- blind area
- 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.)
- Expired - Fee Related
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 238000009499 grossing Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 9
- 229910001018 Cast iron Inorganic materials 0.000 claims description 5
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 5
- 239000000788 chromium alloy Substances 0.000 claims description 5
- 238000005097 cold rolling Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000994 depressogenic effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000881 depressing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Straightening Metal Sheet-Like Bodies (AREA)
Abstract
The utility model discloses a can effectively improve novel rail straightening machine of rail straightening blind area avoids cutting straightening blind area and causes the production extravagant. The straightening machine comprises a straightening roll system arranged on a machine body, wherein a cold roll system consisting of at least one pair of cold rolls with the center connecting line vertical to the running direction of the steel rail is also arranged at the output end of the straightening roll system on the machine body, and roll gaps for the steel rail to pass through are formed between the cold rolls at intervals. The utility model discloses thereby creative add cold rolling equipment on current rail straightening machine and constitute a neotype rail straightening machine, the cold roll of perpendicular to rail traffic direction carries out cold rolling to the rail after straightening through straightening roller system about at least a pair of center line in this cold roll equipment to reduce the rail height of rail straightening blind area, effectively improve the rail height difference of having eliminated rail straightening blind area and rail straightening district even, the effect of correcting also can be played to the fluctuation of the logical length of rail height simultaneously.
Description
Technical field
The utility model 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.
The utility model content
The technical problem that the utility model solved 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 utility model 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 beneficial effects of the utility model are: thus the creationary cold-rolling equipment of setting up on existing rail straghtener of the utility model 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 utility model 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 utility model.
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
Below in conjunction with drawings and Examples the utility model is described further.
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 utility model is at the rail high difference of steel rail straightening blind area with the aligning 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 utility model 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 utility model 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 utility model 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 utility model 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 |
|---|---|---|---|
| CN2009203065661U CN201432200Y (en) | 2009-07-21 | 2009-07-21 | Rail straightener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203065661U CN201432200Y (en) | 2009-07-21 | 2009-07-21 | Rail straightener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201432200Y true CN201432200Y (en) | 2010-03-31 |
Family
ID=42051014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203065661U Expired - Fee Related CN201432200Y (en) | 2009-07-21 | 2009-07-21 | Rail straightener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201432200Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071703A (en) * | 2013-02-19 | 2013-05-01 | 中冶赛迪工程技术股份有限公司 | Section steel straightening device and method |
| CN103157702A (en) * | 2013-03-23 | 2013-06-19 | 鞍钢股份有限公司 | Straightening control method for bending end of heavy rail |
| CN105436248A (en) * | 2015-11-27 | 2016-03-30 | 攀钢集团攀枝花钢钒有限公司 | Extension structure for extension process straightening steel rail end |
| CN105436249A (en) * | 2015-11-27 | 2016-03-30 | 攀钢集团攀枝花钢钒有限公司 | Straightening method for straightening end of steel rail through roller type straightener |
-
2009
- 2009-07-21 CN CN2009203065661U patent/CN201432200Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071703A (en) * | 2013-02-19 | 2013-05-01 | 中冶赛迪工程技术股份有限公司 | Section steel straightening device and method |
| CN103157702A (en) * | 2013-03-23 | 2013-06-19 | 鞍钢股份有限公司 | Straightening control method for bending end of heavy rail |
| CN103157702B (en) * | 2013-03-23 | 2016-09-07 | 鞍钢股份有限公司 | Straightening control method for bending end of heavy rail |
| CN105436248A (en) * | 2015-11-27 | 2016-03-30 | 攀钢集团攀枝花钢钒有限公司 | Extension structure for extension process straightening steel rail end |
| CN105436249A (en) * | 2015-11-27 | 2016-03-30 | 攀钢集团攀枝花钢钒有限公司 | Straightening method for straightening end of steel rail through roller type straightener |
| CN105436248B (en) * | 2015-11-27 | 2018-07-27 | 攀钢集团攀枝花钢钒有限公司 | Epitaxial structure for extension process straightening of kinked rail end |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 617067 Panzhihua city of Sichuan Province East Xiangyang Village, new technology and quality department Patentee after: Pangang Group Steel Vanadium & Titanium Co., Ltd. Address before: 617067 Panzhihua city of Sichuan Province East Xiangyang Village, new technology and quality department Patentee before: Panzhihua New Steel & Vanadium Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100331 Termination date: 20160721 |