CN101642773B - Production line of special section wing rail and manufacturing method thereof - Google Patents
Production line of special section wing rail and manufacturing method thereof Download PDFInfo
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- CN101642773B CN101642773B CN200910169752XA CN200910169752A CN101642773B CN 101642773 B CN101642773 B CN 101642773B CN 200910169752X A CN200910169752X A CN 200910169752XA CN 200910169752 A CN200910169752 A CN 200910169752A CN 101642773 B CN101642773 B CN 101642773B
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Abstract
The invention discloses a production line of special section wing rail and a manufacturing method thereof. The production line comprises a cogging mill and a universal machine set, and is characterized in that the cogging mill comprises an asymmetrical caliber which leads a working edge of a railhead of the special section wing rail is arranged toward the direction below a rolling line, support platforms are mounted on an upper guide and a lower guide at an outlet side of a second edger and a universal finishing mill of the universal machine set to control tapping torque. By adopting the invention, the problems such as reversing, bending and the like caused by uneven deformation due to the asymmetrical section of the special section wing rail can be effectively controlled, and the special section wing rail with a 75m length can be manufactured, which has stable product quality and can satisfy the requirement of high-speed railway construction.
Description
Technical field
The present invention relates to the special section wing rail production field, relate in particular to the production line and the manufacture method thereof of producing special section wing rail by the universal mill production system.
Background technology
Special section wing rail main with the supporting making speed per hour of 60D40 rail be 250 kilometers and above high-speed railway switch, the special section wing rail that uses adopts the method manufacturing (abbreviation " smithwelding special section wing rail ") of " forging+welding " at present.The smithwelding special section wing rail is poor because of quality stability, shape need rely on a large amount of machineds to guarantee, production efficiency is low, and the special section wing rail cut lengths of forging is short, need many root beads to connect, soldered quality and glacing flatness can not reach the high-speed railway standard-required, are difficult to satisfy the development need that China Express Railway is built.
Its steel of special section wing rail is U75V or U71MnK, but the shape of the section configuration of special section wing rail, size and immediate domestic standard section 60kg/m rail also is very different.See Fig. 1, compare the 60kg/m rail, special section wing rail has following characteristics:
(1) be benchmark with the y axle, rail head 1, the web of the rail 2, the flange of rail 3 three parts are all asymmetric;
(2) rail head 1, the web of the rail 2, the flange of rail 3 three part metals allocation proportions are 46.3%, 28.3%, 25.4%, differ greatly, and inhomogeneous deformation is serious;
(3) working edge of rail head (long limb side) width is big, reach 76.7mm, and the 60kg/m rail has only 36.5mm.
It is very big that above characteristics have determined the employing hot-rolling method to make the special section wing rail difficulty.
Summary of the invention
The present invention proposes in order to address the above problem, and its purpose is to provide a kind of can rollingly smoothly lift one's head, waist, the ends three the part all production line and the manufacture method thereof of asymmetric special section wing rail.
In order to reach the foregoing invention purpose, special section wing rail production line provided by the present invention comprises blooming mill and omnipotent unit, wherein said blooming mill comprises asymmetric pass, make the working edge of rail head of special section wing rail towards the arranged beneath of roll line, and be respectively equipped with saddle at second edging mill that described omnipotent unit comprised and the upper and lower guide and guard of outlet side of omnipotent finishing mill, to be used for control tapping moment of torsion.
And described blooming mill comprises first blooming mill that is furnished with box pass and second blooming mill that is furnished with asymmetric pass.Described asymmetric pass comprises trapezoidal hole, hat hole, rail shape hole.
Described omnipotent unit also comprises universal roughing mill and first edging mill and omnipotent middle milling train.
When with the rolled piece of described second edging mill and the rolling special section wing rail of described omnipotent finishing mill, the saddle of guide and guard on the outlet side of described second edging mill and described omnipotent finishing mill, guide and guard down and the gap between the described rolled piece meet the following conditions: S2=S3=S5=S6＜S1=S4, wherein, S1 is the gap that is used in the web of the rail and the last guide and guard to support between the saddle of the web of the rail; S2 is the gap between the saddle that is used in the flange of rail and the last guide and guard at the bottom of the supporting rail; S3 is the gap between the saddle that is used in the flange of rail and the following guide and guard at the bottom of the supporting rail; S4 is the gap that is used in the web of the rail and the following guide and guard to support between the saddle of the web of the rail; S5 is the gap that is used in rail head and the following guide and guard to support between the saddle of rail head; S6 is the gap that is used in rail head and the last guide and guard to support between the saddle of rail head.
In order to reach the foregoing invention purpose, special section wing rail manufacture method provided by the present invention comprises the steps: to utilize first blooming mill that blank is rolled, to be used to roll out the symmetrical blank that meets dimensions; Utilize second blooming mill that described symmetrical blank is rolled, to be used to roll out the asymmetric blank of the shape that tentatively has special section wing rail; Utilize universal roughing mill, first edging mill, omnipotent middle milling train, second edging mill and omnipotent finishing mill that described asymmetric blank is rolled successively, the scope of the horizontal roll drafts of wherein said omnipotent middle milling train is at 5～7mm, the scope of the horizontal roll drafts of described second edging mill is at 0.2～1mm, and the scope of the horizontal roll drafts of described omnipotent finishing mill is at 2～4mm.And the rolling temperature of described first blooming mill is controlled in 1180 ℃～1240 ℃ scopes.
At this, the rolling number of times of described first blooming mill and second blooming mill is respectively each 5～7 passage, the rolling number of times of the described universal roughing mill and first edging mill is respectively each 3 passage, and the rolling number of times of described omnipotent middle milling train and second edging mill and omnipotent finishing mill is respectively each 1 passage.
When described asymmetric blank when described second edging mill and described omnipotent finishing mill shut out, control the tapping moment of torsion by the saddle of the upper and lower guide and guard of outlet side that are located at described second edging mill and described omnipotent finishing mill.
In addition, adopt the tap mode to finish rolling at described second blooming mill.
Aforesaid the present invention has following beneficial effect:
(1) adopt the present invention effectively to control because problems such as reversing of causing of the asymmetric inhomogeneous deformation that brings of section of special section wing rail, bendings;
(2) adopt the present invention can produce the long special section wing rail of 75m, constant product quality can satisfy the high speed railway construction needs.
Description of drawings
Fig. 1 is rail profile figure, and wherein (a) shows the special section wing rail sectional drawing, (b) shows 60kg/m rail profile figure;
Fig. 2 is according to first blooming mill of the embodiment of the invention and the pass layout drawing of second blooming mill;
Fig. 3 is the schematic diagram according to the omnipotent unit of the embodiment of the invention;
Fig. 4 is that wherein, rolled piece is between last guide and guard and following guide and guard according to the sectional view of the guide and guard that are used for special section wing rail of the embodiment of the invention.
The specific embodiment
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.Following embodiment provides in order to make those skilled in the art fully understand content of the present invention, and it can have various other distortion examples, and protection scope of the present invention is not to be confined to the following embodiment that will illustrate.
First blooming mill that provides according to the embodiment of the invention and the pass layout drawing of second blooming mill are provided Fig. 2.
At first, the special section wing rail production line according to present embodiment comprises first blooming mill (BD1), second blooming mill (BD2), omnipotent unit etc.Especially the production line that need to prove the special section wing rail of the embodiment of the invention makes the working edge of rail head of special section wing rail towards the arranged beneath of roll line, and the rolled piece that helps blooming mill like this takes off groove and tapping control.
As shown in Figure 2, BD1 of the present invention and BD2 adopt the less pass schedule of shaped hole, are beneficial to tapping control.Specifically, arrange all box pass 211～216 at BD1, and arrange all asymmetric passes 221～225 at BD2 as symmetrical pass.Wherein, described box pass 211～216 has different basal areas successively respectively, described asymmetric pass comprises a trapezoidal hole 221, hat hole 222, three rail shape holes 223～225, and three rail shape holes respectively are rail shape cutting-in hole 223, rail shape elongated hole 224, pilot hole 225.The working edge of special section wing rail rail head is towards the arranged beneath of roll line as can be seen from the asymmetric pass of BD2, and this arrangement form helps the rail head working edge and is full of, and the rolled piece that is beneficial to blooming mill takes off groove and tapping control.In addition, though arranged 6 box passes 211～216 among the BD1 of present embodiment, when the rolling blank of BD1, only use 2 passes wherein to get final product.And in the present embodiment, though BD1 has arranged 6 passes, BD2 has arranged 5 passes, but the present invention is not limited thereto, those skilled in the art is to be understood that as required at BD1 and BD2 can arrange pass with the present embodiment varying number, for example arrange 2～6 box passes, arrange 5～7 asymmetric passes at BD2 at BD1.
The schematic diagram of the omnipotent unit that provides according to the embodiment of the invention is provided Fig. 3, and Fig. 4 shows the sectional view according to the guide and guard that are used for special section wing rail of the embodiment of the invention, and wherein, rolled piece is between last guide and guard and following guide and guard.As shown in Figure 3, omnipotent unit of the present invention comprises universal roughing mill U1, the first edging mill E1, omnipotent middle milling train U2, the second edging mill E2, omnipotent finishing mill UF.At this, as shown in Figure 4, guide and guard rail head, the flange of rail all are provided with saddle about E2, UF milling train outlet side, to be used for control tapping moment of torsion.Wherein, last guide and guard 41 comprise: saddle 411, be used to support the upper surface of the web of the rail of special section wing rail, and its shape is corresponding with the shape of the upper surface of the web of the rail of described wing rail; Saddle 412 extends left from the left end of saddle 411, and its shape is corresponding with the shape of the upper surface of the flange of rail of described wing rail, with the upper surface of the flange of rail that is used to support described wing rail; Saddle 413 extends to the right from the right-hand member of saddle 411, and its shape is corresponding with the shape of the upper surface of the rail head of described wing rail, with the upper surface of the rail head that is used to support described wing rail.Following guide and guard 42 comprise: saddle 421, be used to support the lower surface of the web of the rail of special section wing rail, and its shape is corresponding with the shape of the lower surface of the web of the rail of described wing rail; Saddle 422 extends left from the left end of saddle 421, and its shape is corresponding with the shape of the lower surface of the flange of rail of described wing rail, with the lower surface of the flange of rail that is used to support described wing rail; Saddle 423 extends to the right from the right-hand member of saddle 421, and its shape is corresponding with the shape of the lower surface of the rail head of described wing rail, with the lower surface of the rail head that is used to support described wing rail.At this, the gap between upper and lower guide and guard 41,42 and the rolled piece 43 should be satisfied: S2=S3=S5=S6＜S1=S4, and wherein S1 is the gap that is used in the web of the rail and the last guide and guard to support between the saddle of the web of the rail; S2 is the gap between the saddle that is used in the flange of rail and the last guide and guard at the bottom of the supporting rail; S3 is the gap between the saddle that is used in the flange of rail and the following guide and guard at the bottom of the supporting rail; S4 is the gap that is used in the web of the rail and the following guide and guard to support between the saddle of the web of the rail; S5 is the gap that is used in rail head and the following guide and guard to support between the saddle of rail head; S6 is the gap that is used in rail head and the last guide and guard to support between the saddle of rail head, thereby make the rail head of special section wing rail and saddle that the flange of rail is used to rail head easily and the saddle that is used for the flange of rail support, like this, not only can reduce the distortion that special section wing rail produces when tapping, and can reduce the scuffing of the oxide skin that adheres on the saddle that is used for the web of the rail to the web of the rail, particularly, special section wing rail is when E2 or UF come out, the flange of rail contacts with guide and guard with rail head, and the web of the rail does not contact with guide and guard, because the contact line length of rail head and the flange of rail and guide and guard has only 20% of the web of the rail, thereby can reduce finished product scratch generation probability greatly.
Next, introduce the method for the production line manufacturing special section wing rail of special section wing rail as mentioned above of utilizing.
At first, in 1180 ℃～1240 ℃ temperature range, utilize BD1 that blank is rolled 5～7 passages, to be used to roll out the symmetrical blank that meets dimensions.Then, utilize BD2 that described symmetrical blank is rolled 5～7 passages,, adopt the tap mode to finish the rolling of BD2 smoothly in order to make production technology at this to be used to roll out the asymmetric blank of the shape that tentatively has special section wing rail.Then, utilize U1/E1 to each rolling 3 passage of described asymmetric blank, utilize each rolling 1 passage of the right title blank of U2/E2 and UF again, wherein the horizontal roll drafts of U2 is controlled at 5～7mm, the horizontal roll drafts of E2 is controlled at 0.2～1mm, and the horizontal roll drafts of UF is controlled at 2～4mm.At this, need to prove when described asymmetric blank when E2 and UF shut out, control the tapping moment of torsion by the saddle of the upper and lower guide and guard of outlet side that are located at E2 and UF.In addition, those skilled in the art is to be understood that the rolling temperature of BD1 is the highest, and each rolling temperature will reduce gradually more backward.
Below, illustrate and pass through the most preferred embodiment of production line manufacturing special section wing rail as mentioned above.
The steel billet material is selected the continuous casting billet of 380 * 280mm (U75V, U71MnK) for use, is comprising rolling special section wing rail on the omnipotent production line of seven frames of BD1-BD2-U1/E1-U2/E2-UF.Especially need to prove that the omnipotent production line of described seven frames makes the working edge of special section wing rail rail head towards the arranged beneath of roll line, the rolled piece that is beneficial to blooming mill takes off groove and tapping control.At first, select for use any 2 box passes on the BD1 under 1200 ℃ temperature (than rolling common rail time high approximately 50 ℃) that described continuous casting billet is rolled, to be used to roll out the symmetrical blank that meets dimensions, thereby provide this symmetry blank to BD2, rolling number of times at this BD1 preferably is controlled at 5 passages, and this 5 passage is the summation of the rolling number of times of 2 box passes choosing in BD1, and for example the rolling number of times of second box pass is controlled at 3 (or 2) passage when the rolling number of times of first box pass is 2 (or 3) passage.Then, symmetrical blank rolling among the BD1 is sent to BD2, and be rolled by asymmetric pass 221～225 successively at BD2, rolling to be used for for tentatively having the asymmetric blank of special section wing rail shape with symmetrical blank, this since blank in each asymmetric pass 221～225 each rolling 1 passage, therefore the rolling number of times summation at BD2 is 5 passages, in other words the rolling number of times of the quantity of asymmetric pass decision BD2 among the BD2 is in addition in order to make production technology adopt the tap mode to finish the rolling of BD2 smoothly.Then, the asymmetric blank that tentatively has the special section wing rail shape is sent to U1/E1 and each rolling 3 passage.Then, the asymmetric blank that U1/E1 is rolled out is sent to U2/E2, and at U2/E2 to each rolling 1 passage of this asymmetric blank, be controlled at 5.8mm (than rolling common rail time big approximately 45%) at the horizontal roll drafts of this U2 milling train, the horizontal roll drafts of E2 milling train is controlled at 0.5mm when rolling common rail (and, E2 does not have drafts).At last, the asymmetric blank that U2/E2 is rolled out is sent to UF, and at UF to rolling 1 passage of this asymmetric blank, be controlled at 2.6mm (than rolling common rail time big approximately 45%) at the horizontal roll drafts of this UF milling train, thereby roll out standard compliant described special section wing rail.At this,, control effectively so can reverse tapping by saddle owing to be equipped with saddle at the upper and lower guide and guard rail head of E2, UF milling train outlet side, the flange of rail of omnipotent unit.
Through the test of present embodiment, successfully rolled out special section wing rail, product quality reaches Ministry of Railways's relevant criterion requirement.
By above description as can be seen, the present invention with inhomogeneous deformation consumption at blooming mill, each frame of omnipotent unit adopts homogeneous deformation rolling, particularly on BD1, arrange box pass entirely, the last complete inhomogeneous pass of arranging of BD2, and, thereby can utilize omnipotent method to come rolling special section wing rail by omnipotent production line with the working edge of special section wing rail rail head arranged beneath towards roll line.Guide and guard rail head, the flange of rail are equipped with saddle up and down at E2, UF milling train outlet side simultaneously, thereby can solve the tapping torsion problem by the balancing rail twisting resistance, improve the stability of production technology simultaneously, reduced the probability that rail blank cut produces, and then improved product quality.
Above-mentioned detailed description is at a kind of preferred possible embodiments explanation of the present invention; only this embodiment is not in order to limit protection scope of the present invention; all other do not break away from the equalization finished under the disclosed technical spirit to be changed and modifies change, all should be contained in the protection domain that the present invention contains.
Claims (8)
1. special section wing rail production line, comprise blooming mill and omnipotent unit, it is characterized in that described blooming mill comprises asymmetric pass, make the working edge of rail head of special section wing rail towards the arranged beneath of roll line, and on the outlet side of second edging mill that described omnipotent unit comprised and omnipotent finishing mill, following guide and guard are respectively equipped with saddle, to be used for control tapping moment of torsion, wherein, when with the rolled piece of described second edging mill and the rolling special section wing rail of described omnipotent finishing mill, guide and guard on the outlet side of described second edging mill and described omnipotent finishing mill, gap between the saddle of following guide and guard and the described rolled piece meets the following conditions:
S2＝S3＝S5＝S6＜S1＝S4，
Wherein, S1 is the gap that is used in the web of the rail and the last guide and guard to support between the saddle of the web of the rail; S2 is the gap between the saddle that is used in the flange of rail and the last guide and guard at the bottom of the supporting rail; S3 is the gap between the saddle that is used in the flange of rail and the following guide and guard at the bottom of the supporting rail; S4 is the gap that is used in the web of the rail and the following guide and guard to support between the saddle of the web of the rail; S5 is the gap that is used in rail head and the following guide and guard to support between the saddle of rail head; S6 is the gap that is used in rail head and the last guide and guard to support between the saddle of rail head.
2. special section wing rail production line according to claim 1 is characterized in that described blooming mill comprises first blooming mill that is furnished with box pass and second blooming mill that is furnished with asymmetric pass.
3. special section wing rail production line according to claim 2 is characterized in that described asymmetric pass comprises trapezoidal hole, hat hole, rail shape hole.
4. special section wing rail production line according to claim 2 is characterized in that described omnipotent unit also comprises universal roughing mill and first edging mill and omnipotent middle milling train.
5. the manufacture method of the special section wing rail of a production line according to claim 4 is characterized in that comprising the steps:
Utilize first blooming mill that blank is rolled, to be used to roll out the symmetrical blank that meets dimensions;
Utilize second blooming mill that described symmetrical blank is rolled, to be used to roll out the asymmetric blank of the shape that tentatively has special section wing rail;
Utilize universal roughing mill, first edging mill, omnipotent middle milling train, second edging mill and omnipotent finishing mill that described asymmetric blank is rolled successively, the horizontal roll drafts of wherein said omnipotent middle milling train is 5～7mm, the horizontal roll drafts of described second edging mill is 0.2～1mm, and the horizontal roll drafts of described omnipotent finishing mill is 2～4mm.
6. special section wing rail manufacture method according to claim 5, the rolling temperature that it is characterized in that described first blooming mill are 1180 ℃～1240 ℃.
7. special section wing rail manufacture method according to claim 5, the rolling number of times that it is characterized in that described first blooming mill and second blooming mill is respectively each 5～7 passage, the rolling number of times of the described universal roughing mill and first edging mill is respectively each 3 passage, and the rolling number of times of described omnipotent middle milling train and second edging mill and omnipotent finishing mill is respectively each 1 passage.
8. special section wing rail manufacture method according to claim 5 is characterized in that adopting the tap mode to finish rolling at described second blooming mill.
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| CN200910169752XA CN101642773B (en) | 2009-08-31 | 2009-08-31 | Production line of special section wing rail and manufacturing method thereof |
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| CN200910169752XA CN101642773B (en) | 2009-08-31 | 2009-08-31 | Production line of special section wing rail and manufacturing method thereof |
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| CN101642773A CN101642773A (en) | 2010-02-10 |
| CN101642773B true CN101642773B (en) | 2011-04-06 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009065B (en) * | 2010-12-15 | 2012-07-18 | 山东钢铁股份有限公司 | Method and device for rolling metal section with asymmetric cross section |
| CN103381424A (en) * | 2012-05-03 | 2013-11-06 | 攀钢集团攀枝花钢钒有限公司 | Steel rail rolling method for reducing inner loosing of steel rail |
| CN103357664B (en) * | 2013-07-19 | 2015-09-23 | 莱芜钢铁集团有限公司 | F shaped roll pass and milling method |
| CN104668287A (en) * | 2014-12-09 | 2015-06-03 | 攀钢集团攀枝花钢钒有限公司 | Universal steel rail rolling mill device and steel rail rolling method |
| CN106391698A (en) * | 2016-09-19 | 2017-02-15 | 石横特钢集团有限公司 | High-tenacity large-specification angle steel production machining technology |
| CN108580560B (en) * | 2018-06-14 | 2019-07-16 | 攀钢集团攀枝花钢钒有限公司 | The method for constructing rail profile specification adjustment optimizing model |
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|---|---|---|---|---|
| DE471152C (en) * | 1927-07-15 | 1929-02-09 | Rudolf Sperling | Method for manufacturing grooved rails |
| US4503699A (en) * | 1982-06-30 | 1985-03-12 | Nippon Steel Corporation | Method and apparatus for rolling rails |
| US5904061A (en) * | 1996-07-13 | 1999-05-18 | Sms Schloemann-Siemag Aktiengesellschaft | Method of rolling finished sections from a preliminary section |
| CN1282820A (en) * | 1999-08-02 | 2001-02-07 | 铁道部宝鸡桥梁工厂 | Wing rail with special cross section for frog of movable rail and its manufacture |
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2009
- 2009-08-31 CN CN200910169752XA patent/CN101642773B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE471152C (en) * | 1927-07-15 | 1929-02-09 | Rudolf Sperling | Method for manufacturing grooved rails |
| US4503699A (en) * | 1982-06-30 | 1985-03-12 | Nippon Steel Corporation | Method and apparatus for rolling rails |
| US5904061A (en) * | 1996-07-13 | 1999-05-18 | Sms Schloemann-Siemag Aktiengesellschaft | Method of rolling finished sections from a preliminary section |
| CN1282820A (en) * | 1999-08-02 | 2001-02-07 | 铁道部宝鸡桥梁工厂 | Wing rail with special cross section for frog of movable rail and its manufacture |
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