CN201632479U - Pass of steel rail breaking-down mill roller - Google Patents
Pass of steel rail breaking-down mill roller Download PDFInfo
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- CN201632479U CN201632479U CN2009202166400U CN200920216640U CN201632479U CN 201632479 U CN201632479 U CN 201632479U CN 2009202166400 U CN2009202166400 U CN 2009202166400U CN 200920216640 U CN200920216640 U CN 200920216640U CN 201632479 U CN201632479 U CN 201632479U
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- rail
- pass
- roll
- rail head
- turning
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Abstract
The utility model relates to a pass of a steel rail breaking-down mill roller. The inclination of the outer lateral wall of a rail head of the pass of the roller of a steel rail breaking-down mill is larger than that of the inner lateral wall of the rail head; the inclination of the outer lateral wall of the rail head ranges from 20% to 30%; and the inclination of the inner lateral wall of the rail head ranges from 2% to 4%. The design of the pass of the steel rail breaking-down mill roller has the advantages of substantially reducing the single-pass turning amount of the roller, simultaneously being capable of ensuring constant metal amount at the rail head and the rail bottom of a rolled piece conveyed to a universal area after each time of turning, and facilitating straight control for steel tapping of frames in the universal area.
Description
Technical field
The utility model relates to steel rail rolling, and specifically, the utility model relates to a kind of rail big mill roll Pass.
Background technology
Usually, omnipotent production line has seven rolling mills, comprises two big mills (BD1, BD2), three universal mills (U1, U2, UF), two edging mills (E1, E2), and this seven rolling mill adopts vertically and arranges.
Rail adopts universal rolling at omnipotent production line.In two big mills, first big mill BD1 disposes 4 passes: two box-shaped holes, 1 trapezoidal, 1 hat hole, rolling 5 passages or 7 passages altogether; Second big mill BD2 disposes 3 kinds of rail shape holes, sees accompanying drawing 1, each rolling 1 passage, rolling 3 passages altogether.Milling train BD2 adopts and directly rolls pass schedule, and roll pass is: the gradient of rail head sidewall and flange of rail sidewall is 2-4%.According to the Rail Production experience, after the rolling a few kiloton rail of single, the wear extent of the rail head of roll pass, flange of rail sidewall is about 2mm, therefore, roll must roll off the production line turning to guarantee rolling accuracy, in general, the necessary turning 100mm of single (promptly, the turning roll makes its diameter reduce 100mm) could recover the pass design size fully, and the maximum permission of cover roll turning amount is 150mm, will be scrapped for twice so a cover roll only uses.Like this, ton steel production cost only one of the roll consumption of milling train BD2 just up to 100 yuan.
For the access times that improve roll reducing production costs, when breaker roll carries out turning, allow roll pass by broadening quantitatively.Usually, roll during by turning the broadening mode of pass be, rail head, flange of rail two parts are carried out broadening, and web of the rail broadening is not seen accompanying drawing 2, but the shortcoming of this broadening mode is, each roll by turning after, the rail head of the pass of formation, flange of rail two parts amount of metal change, and cause each frame tapping of omnipotent zone crooked, cause backfin, break product defects and equipment breakdowns such as device, influence the production direct motion.
The utility model content
The utility model intention solves the roll consumption that can reduce by second big mill BD2 significantly, can guarantee the straight technical problem of each frame tapping of omnipotent zone again.
In order to solve the problems of the technologies described above, the utility model provides a kind of pass design of rail big mill, the roll pass of this rail big mill is: the web of the rail of this rail big mill roll Pass adopts degree of broadening design, promptly according to each pass abrasion condition design web of the rail width.
According to the utility model, the rail head lateral wall gradient of the roll Pass of this rail big mill is greater than rail head madial wall gradient.
According to the utility model, the rail head sidewall adopts the design of diclinic degree, and promptly rail head lateral wall gradient and rail head madial wall gradient do not wait.According to preferred version of the present utility model be, rail head lateral wall gradient is 20-30%, and rail head madial wall gradient is 2-4%.
In order to solve the problems of the technologies described above better, according to the utility model, the high and web of the rail broadening amount sum of the rail of the high roll pass before turning of the rail of the roll pass after the turning.
Web of the rail broadening amount is 2mm.
Web of the rail broadening amount is divided into the web of the rail broadening amount near the web of the rail broadening amount of flange of rail side and close rail head side, and the web of the rail broadening amount of close flange of rail side is greater than the web of the rail broadening amount near the rail head side.
Web of the rail broadening amount near flange of rail side is 1.2mm, and the web of the rail broadening amount of close rail head side is 0.8mm.
Advantage according to rail big mill of the present utility model is: adopt the utility model can reduce the BD2 roll consumption significantly, and rolled piece rail head, the flange of rail amount of metal that can guarantee to deliver to omnipotent zone are constant, help the straight control of tapping of each frame of omnipotent zone.
Description of drawings
Fig. 1 has shown the Roll Pass Collocation of rail big mill;
Fig. 2 has shown that according to traditional handicraft the roll pass of rail big mill is carried out the schematic diagram of rail head, flange of rail broadening;
Fig. 3 has shown the schematic diagram that is carried out web of the rail broadening according to the roll pass of rail big mill of the present utility model;
Fig. 4 has shown the roll pass rail head place gradient design according to rail big mill of the present utility model;
Fig. 5 has shown that the roll pass according to rail big mill of the present utility model is carried out web of the rail broadening state before;
Fig. 6 has shown that the roll pass according to rail big mill of the present utility model is carried out web of the rail broadening state afterwards.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further detailed.
On the omnipotent production line of section rolling, first big mill BD1 and second big mill BD2 arrange successively, and the steel that enter production line are carried out roughing.
As shown in Figure 1, big mill BD2 disposes 3 kinds of rail shape holes, that is, and and rail shape cutting-in hole 1, rail shape elongated hole 2 and pilot hole 3.Rail is successively rolling length by length by rail shape cutting-in hole, rail shape elongated hole and pilot hole quilt.
When once rolling, for example, a few kiloton steel, afterwards, the wearing and tearing of the roll pass of big mill BD2.At this moment, big mill BD2 must roll off the production line and carry out turning to recover its roll pass.According to the utility model, adopt a broadening web of the rail, and broadening rail head and the two-part mode of the flange of rail are not carried out turning to the roll of big mill BD2, as shown in Figure 3.Solid line among Fig. 3 represents that roll pass is carried out web of the rail broadening state before, dotted line among Fig. 3 represents that roll pass is carried out web of the rail broadening state afterwards, shown in the dotted line among Fig. 3, after the web of the rail was carried out broadening, the rail head and the flange of rail also extended to two sides owing to the broadening of the web of the rail.This broadening mode both can reduce roll consumption significantly, can guarantee that again each the frame tapping of omnipotent zone is straight.
After steel was rolled, the roll pass of big mill BD2 was worn because use.When wear extent arrives when a certain amount of, big mill BD2 must roll off the production line and carry out turning to recover its roll pass, to guarantee effect of rolling.Each roll by turning after, the rail head of the pass of formation, flange of rail two parts amount of metal change, when causing the roll that uses after the turning to carry out steel rolling, tapping is crooked.
Therefore, the rail head place angle of sides that the utility model proposes the breaker roll pass is improved.
Sidewall of pass gradient is the degree that the sidewall of pass tilts.No matter be open pass or closed pass, the sidewall of pass is in no instance perpendicular to the axis that rolls rod, and with the vertical plane of roll axis certain included angle arranged, i.e. angle of sides.The method for expressing of sidewall of pass gradient has following 3 kinds: (1) is represented with percentage (%); (2) represent with the tangent in the vertical line institute angle of the sidewall of pass and roll axis; (3) the angle direct representation of the vertical plane of the usefulness sidewall of pass and roll axis.In the utility model, adopt the mode of percentage to represent gradient.
Sidewall of pass gradient has following effect:
(1) can recover the former width of groove after the pass wearing and tearing.The pass of no angle of sides can't recover the former width of groove, and have the pass of angle of sides after the sidewall wearing and tearing, can recover the former width of groove through loaded vehicle after the sidewall wearing and tearing.
(2) make rolled piece be easy to correctly enter pass.Angled side walls makes groove form a horn mouth, so as to automatic capturing, successfully enters pass when rolled piece is sent into pass, even rolled piece has deflection slightly when importing pass, also the effect of reliable sidewall aligns the pass center exactly.
(3) make rolled piece be easy to take off groove, reduce the curling round the roll accident.If the sidewall of pass is vertical with roll axis, after then rolled piece enters pass, spread being got very tightly by sidewall of pass clamping owing to produce, cause rolled piece to take off the groove difficulty.Even can cause curling round the roll and roll breakage accident, and like this,, then can alleviate the clamping action of the sidewall of pass to rolled piece if the sidewall of pass is gradient, make rolled piece be easy to take off groove.
(4) can reduce the turning amount during loaded vehicle roll, prolong roll service life.Sidewall of pass gradient varies in size, and is also different for recovering the necessary loaded vehicle amount of groove original shape.When wear extent one timing, if sidewall of pass gradient is big more, and then turning amount is just more little, otherwise if sidewall of pass gradient is more little, and then turning amount is just big more.
Therefore, the pass of big angle of sides to the loaded vehicle amount that reduces roll, reduce roll consumption, all there is very big meaning in service life of improving roll.The size of sidewall of pass gradient is decided by that the purposes of pass and the deviation of finished product require (referring to last groove) and other factors.Generally speaking, in order to save roll and the condition of work of improving milling train, wish that the gradient of the sidewall of pass is big as far as possible.But angle of sides can not be excessive, otherwise rolled piece reverses easily, and section configuration also is difficult for guaranteeing.And little angle of sides helps the clamping rolled piece, makes rolled piece stable in pass, and the side processing of rolled piece is good.
Can determine sidewall of pass gradient numerical value according to knowhow.
Traditionally, the rail head angle of sides of pass is a definite value normally, and does not change because of the difference of sidewall locations.Like this, for the less pass of some angles of sides, when roll pass is worn and when needing breaker roll to carry out turning, cause usually pass that the roll after the turning forms at the width of the fore shaft part sidewall intersection of extended two rolls of section of pass (that is, from) greater than design load.
The utility model improves the rail head angle of sides design of pass.
As shown in Figure 4, according to the utility model, the design of diclinic degree is adopted in the roll rail shape cutting-in hole 1 of milling train BD2 and/or the pass rail head sidewall of rail shape elongated hole 2.Specifically, be designed to make rail head lateral wall gradient greater than rail head madial wall gradient in roll rail shape cutting-in hole 1 and/or rail shape elongated hole 2, here, that a part of sidewall outside the rail head lateral wall finger-hole type profile, that is, that part of sidewall of the coincidence between two rolls is by the x indication of Fig. 4, and the rail head madial wall is meant the sidewall of the rail head part in the section of pass, by the y indication of Fig. 4.
The preferred version that the utility model provides is, rail head lateral wall x gradient is 20-30%, and rail head madial wall y gradient is 2-4%.
After rolled steel, the roll wear of milling train BD2 causes roll pass distortion, therefore, need carry out turning to milling train BD2, to guarantee the product quality after the roughing.When milling train BD2 is carried out turning, determine the turning broadening amount of the web of the rail according to the abrasion condition of each roll pass, according to big mill BD2 of the present utility model, when its web of the rail broadening is 2mm, milling train BD2 roll single turning amount is 20mm, therefore, compares with traditional BD2 roll single turning amount, single turning amount according to big mill BD2 of the present utility model reduces greatly, is 20% of traditional BD2 roll single turning amount.
After each turning, the rail height of roll pass (being the distance between the flange of rail and the rail head) changes, according to the utility model, and the high and web of the rail broadening amount sum of the high roll pass rail before turning of the roll pass rail after the turning.Specifically, according to Fig. 5 and shown in Figure 6, the roll pass rail height after the turning is h2, roll pass rail height before the turning is h1, web of the rail broadening amount is divided into the web of the rail broadening amount b near the web of the rail broadening amount a of flange of rail side and close rail head side, therefore, and according to the utility model, h2=h1+a+b, wherein, the value of a, b determines according to the abrasion condition of rail head, flange of rail sidewall, generally speaking, a gets 1.2mm, b gets 0.8mm, a+b=2mm.
According to this design that makes rail head lateral wall gradient greater than rail head madial wall gradient, can avoid the rail head fore shaft width partly of the roll pass of broadening after breaker roll carries out turning excessive, thereby can guarantee further that each frame tapping of omnipotent zone is straight.
Though shown and described some exemplary embodiments of the utility model general plotting, but those skilled in the art should understand that, under the situation of principle that does not break away from the utility model general plotting and spirit, can change these exemplary embodiments, the scope of the utility model general plotting is limited by claim and equivalent thereof.
Applicability on the industry
To come into operation according to big mill BD2 of the present utility model, after rolling 8000 tons of 60kg/m rail once, the roll of big mill BD2 rolled off the production line and carry out turning, web of the rail broadening amount is designed to 2mm, one time the turning amount is approximately 20mm, compare with traditional big mill BD2, turning amount decrease, so increase the service life of roll, and production cost reduces.
Claims (2)
1. a rail big mill roll Pass is characterized in that, the rail head lateral wall gradient of the roll Pass of this rail big mill is greater than rail head madial wall gradient.
2. pass as claimed in claim 1 is characterized in that: rail head lateral wall gradient is 20-30%, and rail head madial wall gradient is 2-4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202166400U CN201632479U (en) | 2009-09-14 | 2009-09-14 | Pass of steel rail breaking-down mill roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202166400U CN201632479U (en) | 2009-09-14 | 2009-09-14 | Pass of steel rail breaking-down mill roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201632479U true CN201632479U (en) | 2010-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202166400U Expired - Fee Related CN201632479U (en) | 2009-09-14 | 2009-09-14 | Pass of steel rail breaking-down mill roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201632479U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284491A (en) * | 2011-07-06 | 2011-12-21 | 徐紫宸 | Kitchen knife forming roll and use method thereof |
| CN113617845A (en) * | 2021-08-10 | 2021-11-09 | 江阴康瑞成型技术科技有限公司 | Roller for bimetal composite rolling |
| EP4289522A1 (en) * | 2022-06-09 | 2023-12-13 | Arcelormittal Poland S.A. | Rolling mill roll for rolling railway and tram rails |
-
2009
- 2009-09-14 CN CN2009202166400U patent/CN201632479U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284491A (en) * | 2011-07-06 | 2011-12-21 | 徐紫宸 | Kitchen knife forming roll and use method thereof |
| CN113617845A (en) * | 2021-08-10 | 2021-11-09 | 江阴康瑞成型技术科技有限公司 | Roller for bimetal composite rolling |
| EP4289522A1 (en) * | 2022-06-09 | 2023-12-13 | Arcelormittal Poland S.A. | Rolling mill roll for rolling railway and tram rails |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20170914 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |