CN109078988A - The method for controlling rail head bottom lengthening coefficient - Google Patents
The method for controlling rail head bottom lengthening coefficient Download PDFInfo
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- CN109078988A CN109078988A CN201810872250.2A CN201810872250A CN109078988A CN 109078988 A CN109078988 A CN 109078988A CN 201810872250 A CN201810872250 A CN 201810872250A CN 109078988 A CN109078988 A CN 109078988A
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- rail
- length
- rail head
- web
- rolled piece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2271/00—Mill stand parameters
- B21B2271/02—Roll gap, screw-down position, draft position
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The present invention relates to steel rail rolling method fields, especially a kind of effectively control rail head bottom lengthening coefficient, to mitigate the method for controlling rail head bottom lengthening coefficient of high point, rail head, the web of the rail and rail bottom including rolled piece, it will be left before finished product when passage in rolled piece, the relative length of the rolled piece rolling rail head of tail end, the web of the rail and rail bottom is handled, is i.e. the length of the guarantee rail head and rail bottom length that is longer than the web of the rail, wherein, the range of length difference is 10-50mm.The length of present invention guarantee rail head and rail bottom is longer than the length of the web of the rail, wherein the range of length difference is 10-50mm.After handling in this way, significantly eliminates horizontal roller and be later than the time difference that edger roll is detached from rolled piece, to also be effectively controlled the generation of high point, the quality of product is greatly improved, meanwhile, this improved method is to existing equipment without transformation, therefore, it may have very wide market promotion prospect.Present invention is particularly suitable among the technology controlling and process for mitigating rail high point in omnipotent tandem rolling.
Description
Technical field
The present invention relates to steel rail rolling method field, especially a kind of method for controlling rail head bottom lengthening coefficient.
Background technique
By upper and lower horizontal roller and two sides edger roll, totally four rolls form universal mill, and edging mill is by upper and lower two horizontal roller groups
At two milling trains are at a distance of 3 meters of formation, one Continuous mill train.In general, the horizontal roller diameter 1200mm (drive roll) of universal mill, stands
Roller diameter 800mm (passive guide roller), the horizontal roller diameter 800mm of edging mill.
In actual use, since omnipotent line milling train layout is two frame roughing, a frame or two frame tandem rolling (omnipotent and edging
Machine), a frame UF mm finishing mill unit.In reduction distribution, the drafts of the last a time of tandem mill cannot be too small, causes becoming greatly
In the case where shape amount, tension variation when rail tail portion is detached from universal mill, so that whipping variation is very greatly, to make specification at this
There is big fluctuation in moment.According to records, maximum rail height fluctuation reaches 0.8mm, usual situation fluctuation range 0.4-0.8mm.It cannot
Meet the requirement of high-speed rail straightness.By " high point " state of the rail of field observation at 500-700 DEG C, roll hole is found
Type has significant change in rail head opening full condition, obvious in the boundary line that rail head opening contacts with roll pass at " high point "
It narrows, illustrating " high point ", partially amount of metal is relatively more before finished hole, causes at finished hole " high point " than other parts degree of filling
It is higher, form " high point " in the high direction of rail.Pass through the high point situation of Entity measurement under rail cold conditions.Actual measurement is in 120mm length
The fluctuation of 0.25mm is produced, this has been the lower fluctuation situation of the whole industry, but still is wanted beyond rail body≤0.2mm/1m
It asks, the method generallyd use is polished polishing, and human cost greatly improved.
And the reason of leading to above-mentioned fluctuation, is: as shown in figure 3, the tip of rail is the long part of waist in actually rolling, and
Rail head rail bottom part is shorter, simultaneously because the difference of omnipotent roller diameter, causes asynchronous region length difference larger greatly, to cause
Edger roll leaves rolled piece when whipping, and horizontal roller is later than edger roll and is detached from rolled piece.Edger roll moment is detached from rolled piece (edger roll is passive guide roller) at this time
Roll-force decline to a great extent, motor drag reduction causes corresponding revolving speed to increase, generate before horizontal roller clips one of rail and send power,
By sending power up to 6-10 tons or so before calculating, it is sufficient to cause rail in the abnormal deformation of edging mill part.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of effectively control rail head bottom lengthening coefficients, to mitigate height
The method of the control rail head bottom lengthening coefficient of point.
The technical solution adopted by the present invention to solve the technical problems is: the method for control rail head bottom lengthening coefficient, packet
The rail head, the web of the rail and rail bottom for including rolled piece will leave before finished product when passage in rolled piece, to rail head, the rail of rolled piece rolling tail end
The relative length of waist and rail bottom is handled, i.e., the length of guarantee rail head and rail bottom is longer than the length of the web of the rail, wherein length difference
Range is 10-50mm.
Further, including hat hole, the method by increasing hat hole roll gap realizes the length of rail head and rail bottom tip
Degree is longer than the length of the web of the rail, wherein increase hat hole roll gap range is 2-8mm.
Further, including cutting hole, rolled piece enters cutting hole after overturning via hat hole and continues to roll.
Further, the central axis of the omnipotent horizontal upper roller and omnipotent horizontal lower roller is to be arranged in parallel.
Further, the central axis of the left roller of omnipotent edger roll and the right roller of omnipotent edger roll and omnipotent horizontal upper roller and ten thousand
The orthogonal arrangement of central axis of energy horizontal lower roller.
The beneficial effects of the present invention are: true form of the rail rolled piece in rolling is " web of the rail portion due in existing rolling
Divide long and rail head and rail bottom part short ", i.e., the tip of rail is the long part of waist, and rail head rail bottom part is shorter, simultaneously because
The difference of omnipotent roller diameter causes the edger roll in whipping to be first away from rolled piece, and horizontal roller is then later than edger roll and is detached from rolled piece, in this way
The small time difference then will lead to and be detached from rolled piece as the edger roll moment of passive guide roller, while roll-force declines to a great extent, to go out
This defect of tail portion high point is showed.The present invention is directed to this status, and taking will leave before finished product when passage in rolled piece, to rolling
The relative length of the part rolling rail head of tail end, the web of the rail and rail bottom is handled, and guarantees that the length of rail head and rail bottom is longer than the web of the rail
Length, wherein the range of length difference is 10-50mm.After handling in this way, significantly eliminates horizontal roller and be later than edger roll disengaging rolled piece
Time difference the quality of product is greatly improved to also be effectively controlled the generation of high point, meanwhile, this improvement side
Method is not necessarily to transformation to existing equipment, therefore, it may have very wide market promotion prospect.Present invention is particularly suitable for omnipotent companies
It rolls among the technology controlling and process for mitigating rail high point.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of roll of the invention.
Fig. 2 is the schematic diagram of the rail of rolling of the invention
Fig. 3 is in practical rolling, and the web of the rail elongates and rail head and the low shortened structural schematic diagram of rail.
Fig. 4 is the structural schematic diagram that carries out that treated to the relative length of the rolled piece rolling rail head of tail end, the web of the rail and rail bottom.
Fig. 5 is the structural schematic diagram in hat hole.
Fig. 6 is the structural schematic diagram of cutting hole.
Fig. 7 is the positional diagram of each component in practical rolling.
In the figure, it is marked as the left roller 3 of omnipotent horizontal upper roller 1, omnipotent horizontal lower roller 2, omnipotent edger roll, the right roller 4 of omnipotent edger roll, steel
Rail rolls that roll gap 5, rail head 6, the web of the rail 7, rail be low 8, edging mill upper roller 9, edging mill lower roll 10, rail 11, hat hole 12, cutting hole
13, length difference D, increase hat hole roll gap H.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
The method of control rail head bottom lengthening coefficient as shown in Figures 1 to 7, rail head 6,7 and of the web of the rail including rolled piece 11
Rail bottom 8 will leave before finished product when passage in rolled piece 11, roll the rail head 6 of tail end, the phase of the web of the rail 7 and rail bottom 8 to rolled piece 11
Length is handled, i.e., the length of guarantee rail head 6 and rail bottom 8 is longer than the length of the web of the rail 7, wherein the range of length difference D is
10-50mm。
Firstly, the side schematic view of rail, by Fig. 3, it can be seen that, the web of the rail 7 is drawn when Fig. 3 shows practical rolling
Long, opposite rail head 6 is low with rail 8 shorter, and such shape will lead to such a result: low with rail head 6 and rail 8 contact
Edger roll is first away from rolled piece, and omnipotent horizontal upper roller 1 and omnipotent horizontal lower roller 2 are then later than edger roll and are detached from rolled piece, this is also just inevitable
Cause the edger roll moment as passive guide roller to be detached from rolled piece and whipping occur, while roll-force declines to a great extent, and points out so as to cause height
It is existing.For this problem core, the present invention is designed: will be left before finished product when passage in rolled piece 11, be rolled to rolled piece 11
The relative length of the rail head 6 of tail end, the web of the rail 7 and rail bottom 8 is handled, i.e. the length of guarantee rail head 6 and rail bottom 8 is longer than the web of the rail 7
Length, wherein the range of length difference D be 10-50mm.After the above method, as shown in figure 4, at this point, universal mill from
It opens moment, omnipotent horizontal upper roller 1 and omnipotent horizontal lower roller 2 and the left roller 3 of omnipotent edger roll and the right roller 4 of omnipotent edger roll are detached from the rolled piece time
It is almost the same, it alleviates because edger roll leaves rolled piece and causes the horizontal roller of roll-force reduction generation to pre-feed possibility too early
Property, to effectively control high point.In general, it is preferred that the central axis of the omnipotent horizontal upper roller 1 and omnipotent horizontal lower roller 2 is flat
The central axis and omnipotent horizontal upper roller 1 and omnipotent water of row setting and the left roller 3 of the omnipotent edger roll and the right roller 4 of omnipotent edger roll
The orthogonal arrangement of central axis of flat lower roll 2.
In order to guarantee that the smooth of production carries out, can choose such scheme realize to rolled piece 11 roll tail end rail head 6,
The relative length of the web of the rail 7 and rail bottom 8 is handled, it may be assumed that including hat hole 12, the method by increasing hat hole roll gap H is realized
The length of 8 tip of rail head 6 and rail bottom is longer than the length of the web of the rail 7, wherein increase hat hole roll gap H range is 2-8mm.In general,
In operation of rolling itself, in tail state before omnipotent tandem rolling is last together, when the web of the rail 7 is lower with rail by 8 than rail head 6, to grow part small
In the case where 200mm, 13 type of cutting hole has certain underfill surplus, and the method that live roll gap adjustment can be used increases hat
The increase hat hole roll gap H range in hole 12 is 2-8mm (in the case where guaranteeing that cutting hole does not over-fill), belongs to later period head down payment and increases
Add, so that discount bottom elongation is longer than waist 10-50mm or so, realizes corresponding length adjustment.Generally, above-mentioned increasing is completed
After capped shape hole roll gap H is adjusted, it can choose and continue to roll into cutting hole 13 after overturning rolled piece 11 via hat hole 12
System.
The length of present invention guarantee rail head and rail bottom is longer than the length of the web of the rail, wherein the range of length difference is 10-50mm.
After handling in this way, significantly eliminates horizontal roller and be later than the time difference that edger roll is detached from rolled piece, to also be effectively controlled high point
Generation, the quality of product is greatly improved, meanwhile, this improved method to existing equipment without transformation, therefore, it may have
Very wide market promotion prospect.Present invention is particularly suitable among the technology controlling and process for mitigating rail high point in omnipotent tandem rolling.
Claims (5)
1. the method for controlling rail head bottom lengthening coefficient, rail head (6), the web of the rail (7) and rail bottom (8) including rolled piece (11) are special
Sign is: will be left before finished product when passage in rolled piece (11), to rolled piece (11) rolling rail head (6) of tail end, the web of the rail (7) and
The relative length of rail bottom (8) is handled, i.e., the length of guarantee rail head (6) and rail bottom (8) is longer than the length of the web of the rail (7), wherein
The range of length difference (D) is 10-50mm.
2. the method for control rail head bottom lengthening coefficient as described in claim 1, it is characterised in that: including hat hole (12),
Method by increasing hat hole roll gap (H) realizes that the length of rail head (6) and rail bottom (8) tip is longer than the length of the web of the rail (7),
In, increase hat hole roll gap (H) range is 2-8mm.
3. the method for control rail head bottom lengthening coefficient as claimed in claim 2, it is characterised in that: including cutting hole (13),
Rolled piece (11) enters cutting hole (13) after overturning via hat hole (12) and continues to roll.
4. the method for control rail head bottom lengthening coefficient as claimed in claim 1 or 2, it is characterised in that: the omnipotent level
The central axis of upper roller (1) and omnipotent horizontal lower roller (2) is to be arranged in parallel.
5. the method for control rail head bottom lengthening coefficient as claimed in claim 1 or 2, it is characterised in that: the omnipotent edger roll
The central axis of the central axis of left roller (3) and the right roller of omnipotent edger roll (4) and omnipotent horizontal upper roller (1) and omnipotent horizontal lower roller (2)
The orthogonal arrangement of line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810872250.2A CN109078988B (en) | 2018-08-02 | 2018-08-02 | Method for controlling extension coefficient of rail head bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810872250.2A CN109078988B (en) | 2018-08-02 | 2018-08-02 | Method for controlling extension coefficient of rail head bottom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109078988A true CN109078988A (en) | 2018-12-25 |
| CN109078988B CN109078988B (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810872250.2A Active CN109078988B (en) | 2018-08-02 | 2018-08-02 | Method for controlling extension coefficient of rail head bottom |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953333A (en) * | 2021-10-20 | 2022-01-21 | 攀钢集团攀枝花钢钒有限公司 | Method for determining roll gap value in section bar universal method rolling procedure |
Citations (5)
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| CN102581024A (en) * | 2012-03-09 | 2012-07-18 | 攀钢集团攀枝花钢钒有限公司 | Control method for full-length fluctuation of steel rail height |
| CN102601124A (en) * | 2012-03-09 | 2012-07-25 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling bottom width full-length fluctuation of steel rail |
| CN104941998A (en) * | 2015-05-07 | 2015-09-30 | 内蒙古包钢钢联股份有限公司 | Vertical steel rail rolling 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 |
| CN107597841A (en) * | 2017-07-28 | 2018-01-19 | 包头钢铁（集团）有限责任公司 | The method of complete universal four-roller last groove roll out steel rail |
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2018
- 2018-08-02 CN CN201810872250.2A patent/CN109078988B/en active Active
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| CN102581024A (en) * | 2012-03-09 | 2012-07-18 | 攀钢集团攀枝花钢钒有限公司 | Control method for full-length fluctuation of steel rail height |
| CN102601124A (en) * | 2012-03-09 | 2012-07-25 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling bottom width full-length fluctuation of steel rail |
| CN104941998A (en) * | 2015-05-07 | 2015-09-30 | 内蒙古包钢钢联股份有限公司 | Vertical steel rail rolling 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 |
| CN107597841A (en) * | 2017-07-28 | 2018-01-19 | 包头钢铁（集团）有限责任公司 | The method of complete universal four-roller last groove roll out steel rail |
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|---|
| 朱虎: "基于万能轧制法钢轨连轧变形机理研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953333A (en) * | 2021-10-20 | 2022-01-21 | 攀钢集团攀枝花钢钒有限公司 | Method for determining roll gap value in section bar universal method rolling procedure |
| CN113953333B (en) * | 2021-10-20 | 2023-11-21 | 攀钢集团攀枝花钢钒有限公司 | Method for determining roll gap value in universal rolling procedure of profile |
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| Publication number | Publication date |
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| CN109078988B (en) | 2020-04-07 |
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