CN202943079U - Cogging mill roll shape structure for rolling H-shaped steel - Google Patents
Cogging mill roll shape structure for rolling H-shaped steel Download PDFInfo
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- CN202943079U CN202943079U CN 201220681425 CN201220681425U CN202943079U CN 202943079 U CN202943079 U CN 202943079U CN 201220681425 CN201220681425 CN 201220681425 CN 201220681425 U CN201220681425 U CN 201220681425U CN 202943079 U CN202943079 U CN 202943079U
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Abstract
The utility model provides a cogging mill roll shape structure for rolling H-shaped steel, which is applied to a horizontal rolling hole pattern of a roll of a cogging mill, wherein the cross section of a roll ring R-angle part of the horizontal rolling hole pattern is in a sine curve wave shape; the start point (A) of the roll ring R-angle part is a position tangential to the roll surface of the roll ring, and the end point (B) is a position tangential to the side surface of the roll ring; the analytic formula of the sine curve is: y=A*sin(0.2542*x-5.205)-0.002, wherein the arc corresponding to the R-angle part from the start point to the end point is equally divided into n parts, n is a natural number, each part is defined as a node unit, x is an integer from 1 to n, y represents the distance from each point on the sine wave to a position corresponding to the R angle in non-sine design, the direction of x is the arc length direction along the R angle, the direction of y is the normal direction of the position of a point corresponding to the value of x on the R-angle part, and A is a constant.
Description
Technical field
The utility model relates to a kind of roll profile structure, and especially a kind of roll shape structure of blooming mill horizontal roll of rolled h-section steel beam belongs to the 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 have been widely used in, the steel construction support bracket of industrial structure, the industrial equipment such as petrochemical industry and electric power framework, the LARGE SPAN STEEL BRIDGE member, machinery, vehicle, boats and ships frame structure are in the engineering structures such as underground railway and overpass member.In recent years along with the increase of China H shaped steel demand, domestic H shaped steel output is also in continuous increase, and the theoretical research of H rolling of sectional iron is also being deepened constantly.
Chinese patent as publication number CN101306430A discloses a kind of light thin wall H shaped steel concurrent heating and rolling method, at first the method adopts common H rolling of sectional iron technique, billet rolling is become to have " H " shape rolled piece on web and the edge of a wing, in rolled piece enters, in the finishing mill process, be rolled down to 8mm when following at web or edge of a wing thickness, by the induction heating apparatus that is arranged on production line, web and the edge of a wing are carried out respectively supplementary heating, then be rolled.Adopt the method, make the temperature of rolled piece in the operation of rolling too low because the 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 that causes 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.Chinese patent as 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, one side is rolling to rolled piece height and flange width, on one side attenuate is rolled on web, the edge of a wing; Cut off after roll forming, turn over again after upper cold bed turn 90 degrees carry out cooling.Compared with prior art, advantage is rolled piece temperature drop decrease, and rolled piece can remain at higher temperature rolling, and roll-force is little, has reduced the energy consumption that steel rolling is produced.Chinese patent as publication number CN1030538A discloses a kind of rolling process for steel section, and this production method is by on the milling train of processing hot rolling steel billet, adopts the working roll footpath to exist big difference to realize.Not needing increases any equipment, and the raw material cross dimensions is increased, and reaches the minimizing rolling pass, improve the milling train ability of nipping, thereby improve mill capacity more than 7%, it can improve unit consumption, dimensional accuracy and the rolling stability of roll, and high productivity ratio is arranged.Make the material being wanted to be rolled by one or more big mill (BD) or analog roughing dog bone shape by using one to carry out that X-shaped rolling middle universal mill (UR), a rapid moving change that vertical miller (QE) and is used for carrying out the rolling universal finishing mill (UF) that forms thus the edge of a wing in both sides of H shape and by reversible rolling.
Although the 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, improper or adjustment of rolling mill is improper because of pass design, because being full of, interference forms the ears or side handles of a utensil at the pass opening part, then through rolling and the ears or side handles of a utensil are pressed in people's rolled piece body, but can not form with the body seam, its degree of depth depends on the height of the ears or side handles of a utensil.In addition, the improper or serious wear of designed arc-shaped appearance between waist, leg, after causing the rolled piece surface ditch, rib to occur, more rolling also can form folding.At present both at home and abroad hot rolling is produced H shaped steel and is used comparatively widely that a kind of technique is the X-H rolling, 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 that adopts is Hot Metal in Beam Blank.
Summary of the invention
The utility model provides a kind of blooming mill roll shape structure of rolled h-section steel beam for the deficiencies in the prior art.This blooming mill roll shape structure is mainly for the H shaped steel specification that contains rolling on edge in split rolling method (BD is rolling).
Find by theory analysis, the distortion of the R angular position 3 of the H shaped steel (see figure 1) that contains rolling on edge H shaped steel in the split rolling method process is cosine rule (see figure 2).Straight line 4 in figure represents the match radius of R angular position, and curve 5 represents the physical location of R angular position, and the vertical range between straight line 4 is exactly to depart from the deviation of ideal position.
The blooming mill roll shape structure of the rolled h-section steel beam that the utility model provides is used for the horizontal rolling groove of blooming mill, and 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 point B) is the position tangent with the collars side.
This sinusoidal analytic formula is:
y＝A×sin(0.2542×x-5.205)-0.002，
Wherein, arc length corresponding to R angular position evenly is 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 evenly is divided into 30 parts), every portion is defined as a node unit, so the span of x be exactly 1 to 30(A point be 1, the B point is 30), and be all integer, what the x axle in formula represented is exactly these 30 nodes, y axle representative be on sine curve each point to the distance of the R angle opposite position of non-sine design (traditional design), the mm of unit.The x direction is along the arc length direction at R angle, the y direction done in Fig. 4 and marked (be the y direction along with the x point changes, be exactly the radial direction along the R angle in fact because x is different, radial direction is also difference; In addition, the positive axis of y axle is for pointing to the center of circle direction at R angle.
In the utility model, consider on-site actual situations, only get 1/2 curved unit, namely x gets 8 to 21(and this means that x is that original R angle design is still adopted at 1～7 and 22～30 position).A in formula is a constant, need to adjust according to H shaped steel specification.
On the basis that does not change original technique, the pass R angular position suitable position section rolling in the split rolling method level is processed into sine curve.The horizontal range of the following section in this sinusoidal vertex position (maximum y value) corresponding x point position and R angular position is that 34.15mm(sees Fig. 3, Fig. 4), the position that web folds appears in this place in actual production.The following section 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 the hump the projector distance (this distance is to be also projector distance on the collars horizontal direction in the roll horizontal direction between 2) of the collars horizontal direction between corresponding x point position and above-mentioned points of tangency, it is following (such as in the embodiment 1 of back that peak height is controlled at 0.1mm-0.28mm, actual adding, adopt the mode that rounds up to control peak value below 0.282mm or below 0.1mm man-hour as required), sinusoidal period is 24.7175, and initial phase angle is-5.205.The implication of sinusoidal period is: T=2 π/ω |, ω is exactly the coefficient of x front in function, can think in sine curve figure and two intersection points of x axle between width.The implication of initial phase angle is: the phase place during x=0; Be reflected on coordinate system is moving left and right of image.
Blooming mill roll shape structure ratio of the present utility model 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 utility model provides a kind of blooming mill roll shape structure of rolled h-section steel beam, is used 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 point (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 to R angular position from described starting point to described terminal point evenly is divided into n part, n is natural number, every portion is defined as a node unit, and the span of x is exactly 1 to the integer of n so, the y representative be the distance of the R angle opposite position when on sine curve, each point is to the non-sine design, the mm of unit, the direction of x is along the arc length direction at R angle, and the y direction is the normal direction of corresponding some position of x value on the R angular position, and A is constant.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferred: n=30.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferred: x more than or equal to 8 less than or equal to 21.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferred: 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, and the absolute value of further preferred y is less than or equal to 0.1mm.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferred: the projector distance between the described corresponding x in sinusoidal summit and described starting point on the horizontal direction of described collars is 34.15mm.
In the blooming mill roll shape structure of rolled h-section steel beam as above, preferred: A is 0.0917 or 0.251.
The beneficial effects of the utility model: at first, adopt blooming mill roll shape structure rolled h-section steel beam of the present utility model substantially to stop the folding appearance of web; Secondly, due to the collars R angular position employing sinusoidal form of roll, improve pass before even there are wearing and tearing also can get back to gradually, so also just meaning has increased steel transportation amount.So the utility model has improved production efficiency, improved the quality of production, reduced the waste product incidence.
Description of 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 utility model.
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, the match radius, 5, R angular position offset deviation, 6, edging pass (box hole), 7, Fig. 3 shown in Figure 4 amplifies the position, 8, horizontal rolling groove, 9, the following section in R angular position of collars, 10, sinusoidal line.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described further, but is not limited to this.
Certain factory's production specification is the H shaped steel of UC305mm * 305mm, adopts the X-H rolling, and milling train is configured to a big mill and three reversible tandem rolling units, and (UR-E-UF, UR are 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 that rounds up to control), sinusoidal period 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/ |
| 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 on universal frame after blooming mill is rolling, two universal mills are simultaneously rolling, and universal roughing mill uses the design of X pass, and universal finishing mill becomes the H roll shape according to final product design.Rolled piece comes and goes rolling 5-7 time in the universal mill group.
Adopt the H shaped steel that said method is produced the web Fold not only not occur, and surface quality is very good, steel transportation amount is brought up to 3500 tons/time by original 2500 tons/time.
Certain factory's production specification is HN255mm * 205mm specification H shaped steel, adopts the X-H rolling, and milling train is configured to a big mill and three reversible tandem rolling units, and (UR-E-UF, UR are 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 that rounds up to control), sinusoidal period 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/ |
| 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 on universal frame after blooming mill is rolling, two universal mills are simultaneously rolling, and universal roughing mill uses the design of X pass, and universal finishing mill becomes the H roll shape according to final product design.Rolled piece comes and goes rolling 5-7 time in the universal mill group.
Adopt the H shaped steel that said method is produced the web Fold not only not occur, 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 (8)
1. the blooming mill roll shape structure of a rolled h-section steel beam is used 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 point (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 to R angular position from described starting point to described terminal point evenly is divided into n part, n is natural number, every portion is defined as a node unit, and the span of x is exactly 1 to the integer of n so, the y representative be the distance of the R angle opposite position when on sine curve, each point is to the non-sine design, the mm of unit, the direction of x is along the arc length direction at R angle, and the y direction is the normal direction of corresponding some position of x value on the R angular position, and A is constant.
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, x more than or equal to 8 less than or equal to 21.
4. 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.
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 0.25mm.
6. the blooming mill roll shape structure of rolled h-section steel beam as claimed in claim 5, is characterized in that, the absolute value of y is less than or equal to 0.1mm.
7. 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 on described roll collars horizontal direction the distance of projection be 34.15mm.
8. the blooming mill roll shape structure of rolled h-section steel beam as claimed in claim 1, is characterized in that, A is 0.0917 or 0.251.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962259A (en) * | 2012-12-11 | 2013-03-13 | 莱芜钢铁集团有限公司 | Roll shape structure of roughing mill for rolling H-section steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962259A (en) * | 2012-12-11 | 2013-03-13 | 莱芜钢铁集团有限公司 | Roll shape structure of roughing mill for rolling H-section steel |
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| 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: 20130522 Termination date: 20151211 |
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| EXPY | Termination of patent right or utility model |