CN102962259B - Roll shape structure of roughing mill for rolling H-section steel - Google Patents

Roll shape structure of roughing mill for rolling H-section steel Download PDF

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Publication number
CN102962259B
CN102962259B CN201210533099.2A CN201210533099A CN102962259B CN 102962259 B CN102962259 B CN 102962259B CN 201210533099 A CN201210533099 A CN 201210533099A CN 102962259 B CN102962259 B CN 102962259B
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steel
rolling
angle
rolled
roll shape
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CN201210533099.2A
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Chinese (zh)
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CN102962259A (en
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孙会朝
梁栋
孙庆亮
许荣昌
吴允
陈学涛
尹德全
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莱芜钢铁集团有限公司
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Abstract

The invention provides a roll shape structure of a roughing mill for rolling H-section steel, which is applied to a horizontal rolling groove of a roller of the roughing mill. The section of a collar R angle part of the horizontal rolling pass is in a wave form of a sine curve, a start point (A) is a position where the collar R angle part is tangent to the roller surface of the roller collar, and an end point (B)is a position where the collar R angle part is tangent to the side surface of the roller collar; the analytic formula for the sine curve is y=A*sin(0.2542*x-5.205)-0.002; and an arc from the start point to the end point and corresponding to the R angle part is divided into n sections uniformly, wherein n is a natural number, each section is defined as a node unit, the value range of x covers integrates from 1 to n, y refers to the distance from points on the sine curve to a position corresponding to the R angle when non-sine design is adopted, the direction of x is in the arc length direction of the R angle, the direction of y is the normal direction of a point located at the R-angle part and corresponding to the value of x, and A is a constant.

Description

The blooming mill roll shape structure of rolled h-section steel beam
Technical field
The present invention relates to a kind of roll profile structure, especially a kind of roll shape structure of blooming mill horizontal roll of rolled h-section steel beam, belongs to Metal Forming field shaping technique.
Background technology
H shaped steel is as a kind of economic section shaped steel, compare with common I-steel have that modulus of section is large, bending resistance is strong, light unit weight, good looking appearance, structure are convenient, save man-hour, reduce construction costs and can be processing regenerated etc. advantage, beam, rod structure member in industry and civil buildings steel construction are widely used in, the steel construction support bracket of industrial structure, the industrial equipment such as petrochemical industry and electric power framework, LARGE SPAN STEEL BRIDGE member, machinery, vehicle, boats and ships frame structure, in the engineering structures such as underground railway and overpass member.Along with the increase of China H shaped steel demand, domestic H shaped steel output, also in continuous increase, was also deepening constantly the theoretical research of H rolling of sectional iron in recent years.
As the Chinese patent of publication number CN101306430A discloses a kind of light thin wall H shaped steel concurrent heating and rolling method, first the method adopts common H rolling of sectional iron technique, billet rolling is become to have to " H " shape rolled piece on web and the edge of a wing, in rolled piece enters, in finishing mill process, in the time that web or edge of a wing thickness are rolled down to below 8mm, by the induction heating apparatus that is arranged on production line, web and the edge of a wing are carried out respectively to supplementary heating, be then rolled.Adopt the method, make the temperature of rolled piece in the operation of rolling too low because rolled piece wall thickness is excessively thin with compensation, reduce rolling force and moment, solved due to light thin wall H shaped steel wall and the thin temperature drop causing of the thick difference of edge of a wing web is too fast, final rolling temperature is too low and web and edge of a wing non-uniform temperature etc. cause production hot rolling light thin wall H shaped steel dimension overproof and the unequal problem of performance.As the Chinese patent of publication number CN1935402A discloses a kind of H shape steel vertical rolling method and device, be characterized in that rolled piece is in entering, before finishing mill, having lifting finger to turn over turn 90 degrees, rolled piece is " work " shape by the upset of " H " shape, web enter in vertical state vertical universal mill, edging mill carry out in, finish rolling, rolling to rolled piece height and flange width on one side, rolls attenuate to web, the edge of a wing on one side; After roll forming, cut off, after upper cold bed, turn over again turn 90 degrees carry out cooling.Compared with prior art, advantage is that rolled piece temperature drop significantly reduces, and rolled piece can remain on rolling at higher temperature, and roll-force is little, has reduced the energy consumption that steel rolling is produced.As the Chinese patent of publication number CN1030538A discloses a kind of rolling process for steel section, this production method is by the milling train at processing hot rolling steel billet, adopts working roll footpath to exist big difference to realize.Not needing increases any equipment, and raw material cross dimensions is increased, and reaches minimizing rolling pass, improve the milling train ability of nipping, thereby improve mill capacity more than 7%, it can improve the stability of unit consumption, dimensional accuracy and the rolling of roll, and has high productivity ratio.Make the material being wanted to be rolled by one or more big mill (BD) or analog roughing dog bone shape by use middle universal mill (UR), a rapid moving that carries out X-shaped rolling change vertical miller (QE) and one for carry out the rolling of H shape form in both sides thus the edge of a wing universal finishing mill (UF) and by reversible rolling.
Although rolling process for steel section patent is many both at home and abroad, also do not find so far for the folding patent of studying of web.The folding rolling defect that belongs to of web, because pass design is improper or adjustment of rolling mill is improper, form the ears or side handles of a utensil at pass opening part because interference is full of, then the ears or side handles of a utensil are pressed in people's rolled piece body through rolling, but can not form with body seam, its degree of depth depends on the height of the ears or side handles of a utensil.In addition, between waist, leg, the improper or serious wear of designed arc-shaped appearance, cause rolled piece surface to occur after ditch, rib, then rolling also can form folding.It is X-H rolling that the H of the production of hot rolling both at home and abroad at present shaped steel uses a kind of technique comparatively widely, and milling train is configured to one or two big mills (BD milling train) and three reversible tandem rolling units (Ur-E-Uf).The general blank adopting is Hot Metal in Beam Blank.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of blooming mill roll shape structure of rolled h-section steel beam is provided.This blooming mill roll shape structure is mainly for the H shaped steel specification that contains rolling on edge in split rolling method (BD rolling).
Find by theory analysis, the distortion of H shaped steel (see figure 1) R angular position 3 of H shaped steel in split rolling method process of containing rolling on edge is cosine rule (see figure 2).Straight line 4 in figure represents the matching radius of R angular position, and curve 5 represents the physical location of R angular position, and vertical range between straight line 4 is exactly to depart from the deviation of ideal position.
The blooming mill roll shape structure of rolled h-section steel beam provided by the invention, for the horizontal rolling groove of blooming mill, the section of the collars R angular position of described horizontal rolling groove is sinusoidal waveforms (based on the shaped form of following analytic formula),
One end (starting point A) of described collars R angular position is the position tangent with the roll surface of collars, and the other end (terminal B) is the position tangent with collars side.
This sinusoidal analytic formula is:
y=A×sin(0.2542×x-5.205)-0.002,
Wherein, arc length corresponding R angular position is evenly divided into 30 parts (the non-sine design circular arc (namely traditional R angle design) that is about to the R angular position from A to B is evenly divided into 30 parts), every portion is defined as to a node unit, so the span of x be exactly 1 to 30(A point be 1, B point is 30), and be all integer, what the x axle in formula represented is exactly these 30 nodes, what y axle represented is the distance that on sine curve, each point designs the R angle opposite position of (traditional design) to non-sine, the mm of unit.X direction is along the arc length direction at R angle, y direction in Fig. 4, done and marked (be y direction along with x point changes, be exactly the radial direction along R angle in fact because x difference, radial direction is also difference; In addition, the positive axis of y axle is to point to the center of circle direction at R angle.
In the present invention, consider on-site actual situations, only get 1/2 curved unit, x gets 8 to 21(and this means that x is that 1~7 and 22~30 position still adopts the design of original R angle).A in formula is a constant, need to adjust according to H shaped steel specification.
Do not changing on the basis of original technique, the position section suitable in the pass R angular position of the horizontal rolling of split rolling method is processed into sine curve.The horizontal range of the following portion in this sinusoidal vertex position (maximum y value) corresponding x point position and R angular position is that 34.15mm(is shown in Fig. 3, Fig. 4), in actual production, this place is also the position that occurs that web is folding.The following portion in described R angular position is the tangent position A of the roll surface of collars and R angle circular arc.And the distance of so-called 34.15mm be hump the projector distance (this distance be between 2 be also the projector distance in collars horizontal direction in roll horizontal direction) of collars horizontal direction between corresponding x point position and above-mentioned points of tangency, it is following (such as in embodiment 1 below that peak height is controlled at 0.1mm-0.28mm, actual adding, adopts the mode control peak value rounding up man-hour below 0.282mm or below 0.1mm as required), sinusoidal cycles is 24.7175, and initial phase angle is-5.205.The implication of sinusoidal cycles is: T=2 π/| ω |, ω is exactly the coefficient before x in function, can think the width between two intersection points of x axle in sine curve figure.The implication of initial phase angle is: phase place when x=0; Be reflected on coordinate system is moving left and right of image.
Blooming mill roll shape structure ratio of the present invention is more suitable for the H shaped steel of rolling H N250 × 255, HN305 × 305, HN800 × 300, HN700 × 300, HN900 × 300 and work 63 specifications.
In a word, the invention provides a kind of blooming mill roll shape structure of rolled h-section steel beam, for the horizontal rolling groove of the roll of blooming mill, it is characterized in that,
The section of the collars R angular position of described horizontal rolling groove is sinusoidal waveforms,
The starting point (A) of described collars R angular position is the position tangent with the roll surface of roll collars, and terminal (B) is the position tangent with the side of roll collars;
This sinusoidal analytic formula is:
y=A×sin(0.2542×x-5.205)-0.002,
Wherein, circular arc corresponding R angular position from described starting point to described terminal is evenly divided into n part, n is natural number, every portion is defined as to a node unit, and the span of x is exactly 1 to n integer so, and what y represented is the distance of R angle opposite position when each point is to non-sine design on sine curve, the mm of unit, the direction of x is along the arc length direction at R angle, and y direction is the normal direction of corresponding some position of x value on R angular position, and A is constant.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferably: n=30.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferably: x is more than or equal to 8 and is less than or equal to 21.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferably: the absolute value of y is less than or equal to 0.28mm, and more preferably the absolute value of y is less than or equal to 0.25mm, further preferably the absolute value of y is less than or equal to 0.1mm.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferably: the projector distance between the described corresponding x in sinusoidal summit and described starting point in the horizontal direction of described collars is 34.15mm.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferably: A is 0.0917 or 0.251.
Beneficial effect of the present invention: first, adopt blooming mill roll shape structure rolled h-section steel beam of the present invention substantially to stop the folding appearance of web; Secondly,, because the collars R angular position of roll adopts sinusoidal form, even if there are wearing and tearing also can get back to gradually the pass before improving, so also just mean and increased steel transportation amount.So the present invention has improved production efficiency, improve the quality of production, reduce waste product incidence.
Brief description of the drawings
Fig. 1 is H shaped steel schematic diagram.
Fig. 2 is R angular position deformation rule curve map in H shaped steel split rolling method rolling on edge process.
Fig. 3 is the roll sectional schematic diagram with the horizontal rolling groove of sinusoidal designs of the present invention.
Fig. 4 is the partial enlarged drawing of Fig. 3.
Wherein, description of reference numerals is as follows: 1, the edge of a wing, 2, web, 3, the R angular position of H shaped steel, 4, matching radius, 5, R angular position offset deviation, 6, edging pass (box hole), 7, the Fig. 3 shown in Fig. 4 amplifies position, 8, horizontal rolling groove, 9, the following portion in R angular position of collars, 10, sinusoidal line.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described, but be not limited to this.
Embodiment 1
The H shaped steel that certain factory's production specification is UC305mm × 305mm, adopts X-H rolling, milling train be configured to a big mill and three reversible tandem rolling units (UR-E-UF, UR is a universal roughing mill; E is 1 edging mill; UF is a universal finishing mill):
Blank is Hot Metal in Beam Blank;
The pass of described big mill is designed to a horizontal rolling groove 8 and an edging pass 6, see Fig. 3, and the roll R angle of horizontal rolling groove 8 is processed as sinusoidal shape, be that peak value is controlled at 0.1mm(and can adopts the mode rounding up to control), sinusoidal cycles is 24.7175, initial phase angle is-5.205, and analytic formula is: y=0.0917 × sin (0.2542 × x-5.205)-0.002.
The design of pass R angular position is according to carrying out as following table 1.
Table 1 pass design parameter
??x ??y/mm
??8 ??0.007
??9 ??-0.022
??10 ??-0.044
??11 ??-0.063
??12 ??-0.079
??13 ??-0.089
??14 ??-0.093
??15 ??-0.092
??16 ??-0.085
??17 ??-0.073
??18 ??-0.056
??19 ??-0.036
??20 ??-0.013
??21 ??0.01
Rolled piece carries out universal rolling after blooming mill rolling on universal frame, two universal mill rollings simultaneously, and universal roughing mill uses the design of X pass, and universal finishing mill becomes H roll shape according to final product design.Rolled piece comes and goes rolling 5-7 time in universal mill group.
Adopt the H shaped steel produced of said method not only not occur web Fold, and surface quality is very good, steel transportation amount is brought up to 3500 tons/time by original 2500 tons/time.
Embodiment 2
Certain factory's production specification is HN255mm × 205mm specification H shaped steel, adopts X-H rolling, milling train be configured to a big mill and three reversible tandem rolling units (UR-E-UF, UR is a universal roughing mill; E is 1 edging mill; UF is a universal finishing mill):
Blank is Hot Metal in Beam Blank;
The pass of described big mill is designed to a horizontal rolling groove 8 and an edging pass 6, see Fig. 3, and the roll R angle of horizontal rolling groove 8 is processed as sinusoidal shape, be that peak value is controlled at 0.252mm(and can adopts the mode rounding up to control), sinusoidal cycles is 24.7175, initial phase angle is-5.205, and analytic formula is: y=0.251 × sin (0.2542 × x-5.205)-0.002.
Table 2 pass design parameter
??x ??y/mm
??8 ??0.005
??9 ??-0.058
??10 ??-0.118
??11 ??-0.170
??12 ??-0.211
??13 ??-0.240
??14 ??-0.252
??15 ??-0.250
??16 ??-0.230
??17 ??-0.196
??18 ??-0.150
??19 ??-0.094
??20 ??-0.032
??21 ??0.03
Rolled piece carries out universal rolling after blooming mill rolling on universal frame, two universal mill rollings simultaneously, and universal roughing mill uses the design of X pass, and universal finishing mill becomes H roll shape according to final product design.Rolled piece comes and goes rolling 5-7 time in universal mill group.
Adopt the H shaped steel produced of said method not only not occur web Fold, and surface quality is very good, steel transportation amount is brought up to 3000 tons/time by original 2200 tons/time.
In embodiment 1-2, unspecified technological parameter adopts this area routine techniques.

Claims (6)

1. a blooming mill roll shape structure for rolled h-section steel beam, for the horizontal rolling groove of the roll of blooming mill, is characterized in that,
The section of the collars R angular position of described horizontal rolling groove is sinusoidal waveforms,
The starting point (A) of described collars R angular position is the position tangent with the roll surface of roll collars, and terminal (B) is the position tangent with the side of roll collars;
This sinusoidal analytic formula is:
y=A×sin(0.2542×x-5.205)-0.002,
Wherein, circular arc corresponding R angular position from described starting point to described terminal is evenly divided into n part, n is natural number, and every portion is defined as to a node unit, and the span of x is exactly 1 to n integer so, what y represented is the distance of R angle opposite position when each point is to non-sine design on sine curve, the mm of unit, the direction of x is along the arc length direction at R angle, and y direction is the normal direction of corresponding some position of x value on R angular position, A is constant
X is more than or equal to 8 and is less than or equal to 21,
A is 0.0917 or 0.251.
2. the blooming mill roll shape structure of rolled h-section steel beam as claimed in claim 1, is characterized in that n=30.
3. the blooming mill roll shape structure of rolled h-section steel beam as claimed in claim 1, is characterized in that, the absolute value of y is less than or equal to 0.28mm.
4. the blooming mill roll shape structure of rolled h-section steel beam as claimed in claim 3, is characterized in that, the absolute value of y is less than or equal to 0.25mm.
5. the blooming mill roll shape structure of rolled h-section steel beam as claimed in claim 4, is characterized in that, the absolute value of y is less than or equal to 0.1mm.
6. the blooming mill roll shape structure of rolled h-section steel beam as claimed in claim 1, is characterized in that,
Between the corresponding x point in described sinusoidal summit and described starting point, in described roll collars horizontal direction, the distance of projection is 34.15mm.
CN201210533099.2A 2012-12-11 2012-12-11 Roll shape structure of roughing mill for rolling H-section steel CN102962259B (en)

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Publication number Priority date Publication date Assignee Title
JPH02235510A (en) * 1989-03-09 1990-09-18 Kobe Steel Ltd Device for correcting shape in multi roll mill
JP3769245B2 (en) * 2001-04-25 2006-04-19 新日本製鐵株式会社 Rough rolling method for H-section steel
CN102618782B (en) * 2012-03-30 2013-12-25 莱芜钢铁集团有限公司 Large-specification Z-direction H-steel and preparation method thereof
CN202943079U (en) * 2012-12-11 2013-05-22 莱芜钢铁集团有限公司 Cogging mill roll shape structure for rolling H-shaped steel

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