CN109070157A - The manufacturing method of H profile steel - Google Patents
The manufacturing method of H profile steel Download PDFInfo
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- CN109070157A CN109070157A CN201780024850.7A CN201780024850A CN109070157A CN 109070157 A CN109070157 A CN 109070157A CN 201780024850 A CN201780024850 A CN 201780024850A CN 109070157 A CN109070157 A CN 109070157A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/12—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a continuous process, i.e. without reversing stands
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Abstract
By forming grooving deeper in the end face of the raw material such as slab using end shape protrusion at an acute angle, bend the flange part being consequently formed gradually, to inhibit the generation of the shape defect in rolled material, the growth of blank part is reduced, the flange width H profile steel product bigger than previous flange width is efficiently and stably manufactured.The 1st pass and the 2nd pass in multiple passes are formed with to be vertically formed grooving and forms the protrusion of segmentaion position in rolled material end with the width direction of rolled material, the pass other than final pass after the 3rd pass in multiple passes is formed with the protrusion for being connected to grooving and gradually bending the segmentaion position of formation, it is more than at least one passage of the rolling appearance at multiple passes, the rolling roll gap for rolling the predetermined interval to the mill length direction rear end of rolled material compares the rolling roll gap broadening that the section other than the predetermined interval is rolled and carries out rolling appearance.
Description
Technical field
(cross-reference to related applications)
The Patent 2016-090165 claims priority that the application is filed an application based on April 28th, 2016 to Japan
Power, its contents are hereby incorporated herein by reference.
The present invention relates to manufacturing methods and H that H profile steel is for example manufactured using slab of rectangular in cross-section etc. as raw material
Fashioned iron product.
Background technique
In the case where manufacturing H profile steel, using roughing mill by raw material appearance such as slab, the steel ingots released from heating furnace
For thick profile (the rolled materials of so-called dog-bone shapes), using omnipotent intermediate mill to the web of above-mentioned thick profile, the thickness of flange
Degree is depressed, depressed together using flange implementation width of the edging mill close to the omnipotent intermediate mill to rolled material,
The forging and shaping of end face.Then, go out H profile steel product using universal finishing mill appearance.
In the manufacturing method of such H profile steel, it is known to following technology: in the slab raw material using rectangular in cross-section
When appearance goes out the thick profile of so-called dog-bone shapes, grooving is formed in slab end face at the 1st pass of roughing operation, later,
Opening extension is carried out to the grooving at 2nd later pass, or deepens cutting groove depth and carries out edging, utilizes pass hereafter
Eliminate the grooving of slab end face (referring for example to patent document 1).
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 7-88501 bulletin
Summary of the invention
Problems to be solved by the invention
In recent years, with the enlargement of structure etc., it is expected that manufacturing large-scale H profile steel product.What is be especially desired to is for H
The product that the intensity and toughness of fashioned iron contributes the width of biggish flange bigger than the width of previous flange.In order to manufacture flange
The H profile steel product that width increases, needs to go out flange width than previous flange width come appearance using the appearance in roughing operation
Big rolled material.
However, in such as technology disclosed in above patent document 1, for the end face (slab in raw material such as slabs
End face) grooving is formed, edging is carried out to the end face, for broadening the method for carrying out roughing using it, the width increase of flange is deposited
In the limit.That is, in previous roughing method, there is known following contents: increasing for the width of flange, is set using wedge shape
Meter (design of grooving angle), pressure, which adjust, lubrication adjusts such technology can seek the raising of broadening, but either method is all
Flange width cannot substantially be increased, therefore, indicate the broadening rate of the broadening amount of flange width and the ratio of edging amount in edging
Also there was only 0.8 or so under the conditions of the efficiency of initial stage is highest, under conditions of edging is repeated using same pass, with
Flange width broadening amount increase and the ratio reduce, eventually become 0.5 or so.In addition, it is also envisaged that making the raw material such as slab
Itself enlargement, increases edging amount, but there are the device limit for the equipment scale of roughing mill, drafts etc., accordingly, there exist can not be real
Now sufficiently increase situation as the width of product flange.
Furthermore it is known that usually having behind the length direction front end of rolled material and length direction in the manufacture of H profile steel
End forms the situation for being referred to as the redundance of blank part.In the midway of a series of rolling process, to such blank part
Implement intermediate blank cutting and is jammed in failure as milling train to avoid blank part.
Especially in the manufacture of large-scale H profile steel product, the weight for being rolled the per unit length of material is larger, when rolling
Product extended length it is shorter, therefore the large percentage that blank part is shared in overall length, the growth of the blank part are easy to cause into
The reduction of product rate.Thus, actually especially in the manufacture of large-scale H profile steel product, it is desirable that reduce the life of blank part to the greatest extent
It is long.
In view of the above situation, the purpose of the present invention is to provide a kind of manufacturing technologies of H profile steel, in the manufacture of the H profile steel
In technology, in the roughing operation when manufacturing H profile steel using pass progress, the protrusion at an acute angle using end shape can be passed through
Portion forms grooving in the end face of the raw material such as slab deeper, bends the flange part being consequently formed gradually, to inhibit to be rolled
The generation of shape defect in saw lumber, reduce previous be especially causes great yield rate to be damaged in the manufacture of large-scale H profile steel
The growth of the blank part of consumption efficiently and stably manufactures the flange width H profile steel product bigger than previous flange width.
The solution to the problem
In order to which the purpose for reaching described provides a kind of manufacturing method of H profile steel according to the present invention comprising roughing operation,
The manufacturing method of intermediate rolling process, finishing rolling step, the H profile steel is characterized in that, for carrying out rolling for the roughing operation
Machine engraving is equipped with 5 or more multiple passes for carrying out rolling appearance to rolled material, to rolled at multiple pass
Material carries out 1 passage appearance or multiple passage appearance, the 1st pass and the 2nd pass in the multiple pass be formed with
The width direction of rolled material is vertically formed grooving and forms the protrusion of segmentaion position in rolled material end, described more
The later pass other than final pass of the 3rd pass in a pass be formed be connected to the grooving and by point of formation
The protrusion that position is gradually bent is cut, the final pass in the multiple pass is flat appearance pass, in the multiple pass
The later pass other than final pass of the 2nd pass at, in the appearance more than at least one passage, be rolled material
End face and the state of pass week face contact depressed, at least one passage of the rolling appearance at the multiple pass with
On, the rolling roll gap for rolling the predetermined interval to the mill length direction rear end of rolled material is compared in addition to this is predetermined
The rolling roll gap that section except section is rolled is widened and carries out rolling appearance.
The top end part angle for being also possible to the protrusion in the 1st pass and the formation of the 2nd pass is 25 ° or more and 40 °
Below.
It is also possible in whole passages of the rolling appearance at the 1st pass in the multiple pass, makes to rolled
The rolling roll gap that the predetermined interval of the mill length direction rear end of material is rolled compares the area other than the predetermined interval
Between rolled rolling roll gap broadening and carry out rolling appearance.
It is also possible to whole passages of at least the 3rd pass in the multiple pass and the rolling appearance at the 4th pass
In, the rolling roll gap for rolling the predetermined interval to the mill length direction rear end of rolled material is compared in addition to this is predetermined
The rolling roll gap that section except section is rolled is widened and carries out rolling appearance.
Be also possible in the rolling appearance at the 2nd pass in the multiple pass, be rolled material end face with
2nd pass pass week face contact the passage depressed of state in, make the mill length direction rear end to rolled material
The rolling roll gap that the predetermined interval in portion is rolled compares the rolling roll gap that the section other than the predetermined interval is rolled
It widens and carries out rolling appearance.
It is also possible in whole passages of the rolling appearance at the final pass in the multiple pass, makes to being rolled
The rolling roll gap that the predetermined interval of the mill length direction rear end of saw lumber is rolled compares other than the predetermined interval
The rolling roll gap that section is rolled is widened and carries out rolling appearance.
It is also possible to rolling at whole passes other than the 1st pass and final pass in the multiple pass
In the whole passages for manufacturing shape, the Rolling roller that rolls the predetermined interval to the mill length direction rear end of rolled material
Gap compares the rolling roll gap broadening that the section other than the predetermined interval is rolled and carries out rolling appearance.
It is also possible to the stage after the roughing operation and before the intermediate rolling process, only to rolled material
Web portion carry out intermediate blank cut off operation.
It is also possible to after being fully completed the roughing operation, intermediate rolling process, finishing rolling step, it is first to remove
In the blank shape portion that the length direction end of rolled material is formed.
It is also possible to be equipped with the roll gap for changing the hole type roll of the milling train in the milling train for carrying out the roughing operation
Screw-down.
It is to utilize above-mentioned H profile steel in addition, from another point of view, according to the present invention, providing a kind of H profile steel product
Manufacturing method manufacture, which is characterized in that web height is 1000mm or more or flange width is
400mm or more.
The effect of invention
It according to the present invention, can be by utilizing end shape in the roughing operation when manufacturing H profile steel using pass progress
Protrusion at an acute angle forms grooving in the end face of the raw material such as slab deeper, and the flange part being consequently formed gradually is bent,
To inhibit the generation of the shape defect in rolled material, reducing especially led to pole in the manufacture of large-scale H profile steel in the past
The growth of the blank part of big yield losses efficiently and stably manufactures the flange width H-type bigger than previous flange width
Steel part.
Detailed description of the invention
Fig. 1 is the outline figure of the production line about H profile steel.
Fig. 2 is the outline figure of the 1st pass.
Fig. 3 is the outline figure of the 2nd pass.
Fig. 4 is the outline figure of the 3rd pass.
Fig. 5 is the outline figure of the 4th pass.
Fig. 6 is the outline figure of the 5th pass (flat appearance pass).
Fig. 7 is the outline figure about previous H profile steel rolling technique.
Fig. 8 is that Rolling roller is applied in the rolling appearance at the 2nd pass in the manufacturing method of the H profile steel of present embodiment
The outline figure for the case where gap automatically controls.
Fig. 9 is that Rolling roller is applied in the rolling appearance at the 5th pass in the manufacturing method of the H profile steel of present embodiment
The outline figure for the case where gap automatically controls.
Figure 10 is the chart for indicating the verification result of reference example 1 and reference example 2.
Figure 11 is the 1st hole of utilization of the shape and present embodiment to the flange part after the edging in previous manufacturing method
The explanatory diagram that the shape for the flange part that type~the 4th pass appearance goes out is compared.
Figure 12 is the chart for indicating the measurement result of comparative example.
Figure 13 is the chart for indicating the measurement result of embodiment.
Specific embodiment
Hereinafter, being described with reference to embodiments of the present invention.In addition, in the present description and drawings, to substantial tool
There is the constituent element of identical functional structure to mark identical appended drawing reference, to omit repeated explanation.
Hereinafter, being described with reference to embodiments of the present invention.In addition, in the present description and drawings, to substantial tool
There is the constituent element of identical functional structure to mark identical appended drawing reference, to omit repeated explanation.
Fig. 1 is the explanatory diagram about the production line T of the H profile steel including the rolling equipment 1 comprising present embodiment.Such as Fig. 1
It is shown, heating furnace 2, sizing mill 3, roughing mill 4, omnipotent intermediate mill 5, ten thousand are configured in order from upstream side on production line T
It can finishing mill 8.In addition, being equipped with edging mill 9 close to omnipotent 5 ground of intermediate mill.In addition, hereinafter, for ease of description, by production line
Steel on T are referred to as and are recorded as " rolled material A ", suitably illustrate its shape using dotted line oblique line etc. sometimes in the various figures
Shape.
As shown in Figure 1, on production line T, to being released from heating furnace 2 for example as the rectangular in cross-section of slab 11
Raw material (rolled material A later) carry out roughing in sizing mill 3 and roughing mill 4.Then, in omnipotent intermediate mill 5 into
The intermediate rolling of row.When rolling among this, (flange is corresponding for the flange top end part using edging mill 9 to rolled material as needed
Portion 12) implement pressure.In normal circumstances, it is carved on the roller of the roller of sizing mill 3 and roughing mill 4 and is equipped with edging pass and is used for
Reduce the thickness of web part and shape the so-called flat appearance pass of the shape of flange portion, via these passes using more
The reversed rolling of passage carrys out appearance and goes out the thick profile 13 of H-type, using including the omnipotent intermediate mill 5- edging mill 9, the two are rolled
The mill of machine, applies the pressure of multiple passages to the thick profile of the H-type 13, and appearance goes out intermediate wood 14.Then, intermediate wood 14 is existed
Finish rolling is article shape in universal finishing mill 8, produces H profile steel product 16.
Here, the slab thickness T for the slab 11 released from heating furnace 2 is for example in 240mm or more and 310mm model below
In enclosing.This is the size of plate blank used when manufacturing common H profile steel product.
Then, illustrate the pass structure that sizing mill 3 and 4 quarter of roughing mill shown in Fig. 1 set, pass shape referring to the drawings
Shape.Fig. 2~Fig. 6 is about the outline figure in sizing mill 3 and the pass set at 4 quarter of roughing mill for carrying out roughing operation.
1st pass~the 4th pass described herein as, which both can be carved all, is set to such as sizing mill 3, can also be by the 1st pass~the 5th hole
This 5 passes of type, which are separately carved, is set to sizing mill 3 and roughing mill 4.That is, the 1st pass~the 4th pass can both have been carved set on sizing mill 3
With 4 the two of roughing mill, can also carve set on any milling train.It is each at these in the roughing operation of the manufacture of common H profile steel
1 passage appearance or multiple passage appearance are carried out at pass.
In addition, in the present embodiment, it is 5 situations to be illustrated that illustration, which carves the pass set, but for its hole
Type number does not need be 5 passes, is also possible to 5 or more multiple pass numbers.As long as that is, in order to the thick profile of H-type
13 carry out appearance and preferred pass structure.In addition, in Fig. 2~Fig. 6, when illustrating the appearance at each pass with dotted line
The final passage outline shape of rolled material A.
Fig. 2 is the outline figure of the 1st pass K1.1st pass K1 carves the epithyrid roller 20 being set to as a pair of of horizontal roller
Pressure appearance is carried out to rolled material A in the roll gap of these epithyrid rollers 20 and lower pass roller 21 with lower pass roller 21.
In addition, the circumferential surface (i.e. the upper surface of the 1st pass K1) in epithyrid roller 20 is formed with towards protrusion 25 outstanding inside pass.
Also, it is formed in the circumferential surface of lower pass roller 21 (i.e. the bottom surface of the 1st pass K1) towards protrusion 26 outstanding inside pass.This
A little protrusions 25,26 have a cone-shaped, and the protrusion length equidimension of protrusion 25 and protrusion 26 is configured to equal respectively.It will dash forward
The height (prominent length) for playing portion 25,26 is set as h1, and top end part angle is set as θ 1a.
At the 1st pass K1, protrusion 25,26 is pressed against the upper and lower end parts (slab end face) of rolled material A, and formation is cut
Slot 28,29.It is desirable here that top end part angle (also referred to as wedge angle) the θ 1a of protrusion 25,26 is, for example, 25 ° or more
And 40 ° or less.
Here, it is preferable that thickness (i.e. slab thickness) the substantially phase of the pass width of the 1st pass K1 and rolled material A
Deng.Specifically, thick by the width and slab for making the pass at the top end part of the 1st pass K1 protrusion 25,26 formed
Spend it is identical, to properly ensure the left and right centering of rolled material A.Moreover it is preferred that by being set as such pass ruler
Very little structure, as shown in Fig. 2, when appearance at the 1st pass K1, it is above-mentioned in the upper and lower end parts (slab end face) of rolled material A
The part of protrusion 25,26 and pass side (side wall) is contacted with rolled material A, does not utilize the upper surface and bottom of the 1st pass K1
Slab upper and lower end parts in face of being divided into 4 elements (position) by grooving 28,29 carry out positive pressure.The reason is that by
The pressure that the upper surface of pass and bottom surface carry out will lead to the elongation of rolled material A generation alongst, cause flange (after
The flange part 80 stated) formation efficiency reduce.That is, protrusion 25,26 is pressed against the upper and lower of rolled material A at the 1st pass K1
End (slab end face) and the drafts (wedge-like tip drafts) of the protrusion 25,26 when forming grooving 28,29 are than on slab
The drafts (slab end face drafts) of lower end forms grooving 28,29 greatly enough to more as a result,.
Fig. 3 is the outline figure of the 2nd pass K2.2nd pass K2 carves the epithyrid roller 30 being set to as a pair of of horizontal roller
With lower pass roller 31.It is formed in the circumferential surface (i.e. the upper surface of the 2nd pass K2) of epithyrid roller 30 outstanding towards pass inside
Protrusion 35.Also, it is formed in the circumferential surface of lower pass roller 31 (i.e. the bottom surface of the 2nd pass K2) outstanding prominent towards pass inside
Play portion 36.These protrusions 35,36 have cone-shaped, and the protrusion length equidimension of protrusion 35 and protrusion 36 is configured to distinguish
It is equal.It is desirable that, the top end part angle of these protrusions 35,36 is 25 ° or more and 40 ° wedge angle θ 1b below.
In addition, improving guided bone in order to ensure the top end part thickness in the suitable portion of flange, guarantee the stability of rolling, preferably
, the wedge angle θ 1a of above-mentioned 1st pass K1 is angle identical with the wedge angle θ 1b of the 2nd pass K2 of rear class.
Height (prominent length) h2 of protrusion 35,36 is configured to the height of the protrusion 25,26 than above-mentioned 1st pass K1
H1 high becomes h2 > h1.In addition, in rolling dimensional accuracy preferably, the top end part angle of protrusion 35,36 and above-mentioned the
The top end part angle of the protrusion 25,26 of 1 pass K1 is identical.It is right in the roll gap of these epithyrid rollers 30 and lower pass roller 31
Pass through the rolled material A further progress appearance after above-mentioned 1st pass K1.
Here, the 2nd pass K2 formed protrusion 35,36 height h2 than formed in the 1st pass K1 protrusion 25,
26 height h1 high, similarly, the entrance length that the 2nd pass K2 enters to the upper and lower end parts (slab end face) of rolled material A
It is longer.The height h2 phase into depth and protrusion 35,36 that protrusion 35,36 at 2nd pass K2 enters to rolled material A
Together.That is, raised at entrance depth h1 ' and the 2nd pass K2 that the protrusion 25,26 at the 1st pass K1 enters to rolled material A
The entrance depth h2 that portion 35,36 enters to rolled material A becomes following relationship: h1 ' < h2.
In addition, the pass upper surface 30a, 30b opposite with the upper and lower end parts (slab end face) of rolled material A, pass bottom surface
The inclined surface angulation θ f of 31a, 31b and protrusion 35,36 it is shown in Fig. 34 at be all configured to about 90 ° it is (substantially straight
Angle).
As shown in figure 3, the entrance length of protrusion when being pressed against upper and lower end parts (the slab end face) of rolled material A compared with
Long, therefore, the appearance at the 2nd pass K2 makes the grooving formed at the 1st pass K1 28,29 become deeper, cuts to be formed
Slot 38,39.In addition, the size based on the grooving 38,39 formed herein, at the end of determining the flange appearance process in roughing operation
Flange unilateral side width.
In addition, the appearance at the 2nd pass K2 is carried out by multiple passages, but the final passage in the multi-pass appearance
In, it carries out making same pass upper surface 30a, the 30b and pass bottom surface corresponding thereto of the upper and lower end parts (slab end face) of rolled material A
31a, 31b contact such appearance.The reason is that if by rolled material A or more in whole passages at the 2nd pass K2
It is set as not contacting inside end and pass, it is likely that generate (portion corresponding with aftermentioned flange part 80 of the suitable portion of flange
Position) appearance is at left-right asymmetry such shape defect, and there are problems in terms of material road ability.
Fig. 4 is the outline figure of the 3rd pass K3.3rd pass K3 carves the epithyrid roller 40 being set to as a pair of of horizontal roller
With lower pass roller 41.It is formed in the circumferential surface (i.e. the upper surface of the 3rd pass K3) of epithyrid roller 40 outstanding towards pass inside
Protrusion 45.Also, it is formed in the circumferential surface of lower pass roller 41 (i.e. the bottom surface of the 3rd pass K3) outstanding prominent towards pass inside
Play portion 46.These protrusions 45,46 have cone-shaped, and the protrusion length equidimension of protrusion 45 and protrusion 46 is configured to distinguish
It is equal.
The top end part angle, θ 2 of above-mentioned protrusion 45,46 is configured to bigger than above-mentioned angle, θ 1b, and protrusion 45,46 is to being rolled
Saw lumber A enters shorter (i.e. h3 < h2) than the entrance depth h2 of above-mentioned protrusion 35,36 into depth h3.The angle, θ 2 is for example excellent
It is selected as 70 ° or more and 110 ° or less.
In addition, the pass upper surface 40a, 40b opposite with the upper and lower end parts (slab end face) of rolled material A, pass bottom surface
All be configured at the inclined surface angulation θ f shown in Fig. 44 of 41a, 41b and protrusion 45,46 about 90 ° it is (substantially straight
Angle).
As shown in figure 4, at the 3rd pass K3, for by the rolled material A after the 2nd pass K2, protrusion 45,46 is pressed
Be against the grooving 38,39 that the upper and lower end parts (slab end face) at the 2nd pass K2 in rolled material A are formed, thus make grooving 38,
39 become grooving 48,49.That is, the most deep angle of grooving 48,49 is (following in the final passage of the appearance at the 3rd pass K3
Also referred to as grooving angle) become θ 2.In other words, the appearance at the 3rd pass K3 makes at the 2nd pass K2 with grooving 38,39
The segmentaion position (position corresponding with aftermentioned flange part 80) that appearance simultaneously goes out is formed to bend outward.
It is carried out in addition, the appearance at the 3rd pass K3 shown in Fig. 4 passes through at least one passage or more, at least 1 wherein
More than a passage, to be rolled inside the upper and lower end parts (slab end face) and pass of material A (upper surface and bottom surface of the 3rd pass K3)
The state of contact carries out appearance.Preferably, the upper and lower end parts (slab end face) and pass interior contact of material A are rolled with this
State carries out the slighter compress of the end.
Fig. 5 is the outline figure of the 4th pass K4.4th pass K4 carves the epithyrid roller 50 being set to as a pair of of horizontal roller
With lower pass roller 51.It is formed in the circumferential surface (i.e. the upper surface of the 4th pass K4) of epithyrid roller 50 outstanding towards pass inside
Protrusion 55.Also, it is formed in the circumferential surface of lower pass roller 51 (i.e. the bottom surface of the 4th pass K4) outstanding prominent towards pass inside
Play portion 56.These protrusions 55,56 have cone-shaped, and the protrusion length equidimension of protrusion 55 and protrusion 56 is configured to distinguish
It is equal.
The top end part angle, θ 3 of above-mentioned protrusion 55,56 is configured to bigger than above-mentioned angle, θ 2, and protrusion 55,56 is to rolled
Material A enters shorter (i.e. h4 < h3) than the entrance depth h3 of above-mentioned protrusion 45,46 into depth h4.
In addition, in the same manner as above-mentioned 3rd pass K3, the opposite pass with the upper and lower end parts (slab end face) of rolled material A
The inclined surface angulation θ f of upper surface 50a, 50b, pass bottom surface 51a, 51b and protrusion 55,56 it is shown in Fig. 54 at
All it is configured to about 90 ° (approximate right angle).
At the 4th pass K4, for by the rolled material A after the 3rd pass K3, protrusion 55,56 is pressed against in the 3rd hole
Type K3 is in the grooving 48,49 that the upper and lower end parts (slab end face) of rolled material A are formed, so that grooving 48,49 be made to extend
For grooving 58,59.That is, the most deep angle of grooving 58,59 is (following to be also referred to as in the final passage of the appearance at the 4th pass K4
Make grooving angle) become θ 3.In other words, the appearance at the 4th pass K4 make at the 3rd pass K3 with the formation of grooving 48,49
The segmentaion position (position corresponding with aftermentioned flange part 80) that appearance simultaneously goes out further out roll over by lateral bending.Appearance goes out in this way
Rolled material A upper and lower end parts position be comparable to after H profile steel product flange position, here, referred to as flange
Portion 80.
Appearance at 4th pass K4 shown in fig. 5 is by more than at least one passage carrying out, at least one passage wherein
More than, it is contacted with the upper and lower end parts (slab end face) of rolled material A with (upper surface and bottom surface of the 4th pass K4) inside pass
State carries out appearance.Preferably, with this be rolled material A upper and lower end parts (slab end face) and pass interior contact state into
The slighter compress of the row end.
Fig. 6 is the outline figure of the 5th pass K5.5th pass K5 includes 85 He of epithyrid roller as a pair of of horizontal roller
Lower pass roller 86.As shown in fig. 6, at the 5th pass K5, make what appearance in equipment until until the 4th pass K4 went out to be rolled
Saw lumber A is rotated by 90 ° or 270 °, becomes the convex of the upper and lower side for being located at rolled material A in equipment until until the 4th pass K4
Edge 80 is in such configuration on rolling nodel line.Moreover, at the 5th pass K5, the company that flange part 80 at two is connected is carried out
The pressure of the flange top end part of the pressure and flange part 80 of socket part, that is, web portion 82, carries out the size adjusting of flange width.In this way
One, appearance goes out the thick profile of H-type (the thick profile 13 of H-type shown in FIG. 1) of so-called dog-bone shapes.In addition, the 5th pass K5 will
Web portion 82 is depressed and reduces its thickness, therefore also referred to as web subtracts thick pass or flat appearance pass.
Use including as the mill of omnipotent 9 the two milling trains of intermediate mill 5- edging mill of known milling train, to this
The thick profile 13 of H-type that sample appearance goes out applies the reversed rolling of multiple passages, and appearance goes out intermediate wood 14.Moreover, intermediate wood 14 is existed
Finish rolling is article shape in universal finishing mill 8, produces H profile steel product 16 (referring to Fig.1).
As described above, carrying out the upper and lower side in rolled material A using the 1st pass K4 of pass K1~the 4th of present embodiment
Portion (slab end face) is formed grooving and makes the processing bent to the left and right using each section that these groovings are divided right and left, and flange is formed
Portion 80, by carrying out such appearance, to the upper and lower end face of rolled material A (slab) not depressed along roughly vertical direction
Just it is able to carry out the appearance of the thick profile 13 of H-type.That is, with the roughing side for always depressing slab end face and carrying out that was carried out in the past
Method is compared, and flange width can be made to increase and carry out appearance to the thick profile of H-type 13, larger as a result, it is possible to manufacture flange width
Final product (H profile steel).
Here, in the manufacturing method of the H profile steel of present embodiment, before the plain barrel pass appearance in previous manufacturing method
The shape of flange part compare, the flange part 80 for the rolled material A for utilizing the 1st above-mentioned pass K4 appearance of pass K1~the 4th to go out
Shape be closer to the shape of product flange.Its cause is to use following appearance technology: not changing cutting as raw material
Face carries out making to be formed grooving and the segmentaion position (flange part 80) of appearance out is curved in the end shape of the raw material (slab) of rectangle
The processing of folding.In addition, Figure 11 is shape and the 1st above-mentioned hole of utilization to the flange part after the edging in previous manufacturing method
The explanatory diagram that the shape for the flange part 80 that the pass K4 appearance of type K1~the 4th goes out is compared.It will also realize that according to Figure 11, utilize this reality
The shape for applying the flange part of the manufacturing method appearance of the H profile steel of mode out is closer to the shape of product flange.
In such appearance technology, in the appearance at the 1st pass K4 of pass K1~the 4th, quilt is not being depressed energetically
Rolling appearance is carried out under the premise of the upper and lower end parts (slab end face) of rolled stock A, is rolled the edge of material A (especially flange part 80)
Length direction elongation it is minimum.
On the other hand, in previous H profile steel manufacturing technology, it is known that (be equivalent to present embodiment using in the edging stage
The 1st pass K4 of pass K1~the 4th at rolling appearance) energetically implement flange part pressure structure, flange part rolled
The degree stretched on the length direction of saw lumber A is bigger than the degree that web portion stretches on the length direction of rolled material A, is being rolled
Saw lumber length direction end can generate the so-called excision shape (so-called blank shape) referred to as fish tail.Furthermore it is known that
Plain barrel pass rolling sequence (the rolling appearance at the 5th pass K5 of present embodiment), the pressure of the reduction ratio of web portion than flange part
Lower rate is big, therefore can generate the so-called blank shape referred to as tongue.Hereinafter, illustrating these blank shapes referring to Fig. 7.
Fig. 7 is the outline figure about previous H profile steel rolling technique, (a) of Fig. 7 be observed from side it is previous
The edging stage outline side view, (b) of Fig. 7 is the diagrammatic top of previous plain barrel pass rolling sequence viewed from above
Figure.In addition, the left side in Fig. 7 indicates rolling upstream side.
As shown in (a) of Fig. 7, in previous H profile steel manufacturing technology, the pressure of flange part is energetically carried out in the edging stage
Under, therefore the elongation on the length direction in rolled material A of flange part is than the length direction in rolled material A of web portion
On elongation it is big, formed it is so-called referred to as fish tail blank shape portion 90 (reference Fig. 7 (a) in dotted line part).
Later, as shown in (b) of Fig. 7, in previous H profile steel manufacturing technology, in plain barrel pass rolling sequence, in contrast
The reduction ratio of web portion is bigger than the reduction ratio of flange part, therefore the elongation on the length direction in rolled material A of web portion
It is bigger than the elongation on the length direction in rolled material A of flange part, form the so-called blank shape portion referred to as tongue
92 (dotted line parts in (b) of reference Fig. 7).
Known such blank shape portion 90,92 referred to as fish tail or tongue rolling bite end and rolling is pedaled out
This forms growth at two at end (Japanese: calendering kick out the end), but it is more significant especially to pedal the growth at outlet in rolling.
In addition, the length direction length of the blank shape portion 90 formed in this way is set as L1, by the length of blank shape portion 92
Degree direction length is set as L2.
There are the following problems for the blank shape portion 90,92 formed in this way: having in subsequent process (intermediate rolling process)
May be generated when being bitten to milling train bite it is bad, centre rolling continue become difficult.Specifically, (b) institute of Fig. 7
The blank shape portion 90,92 shown leads to the problem of following such.
That is, in the case where foring the blank shape portion 90 referred to as fish tail, in the intermediate rolling as subsequent handling
In, the flange part of rolled material A is carried out rolling between horizontal roller side and perpendicular roller in universal rolling and perpendicular roller is usual
No driven roller, therefore rolled material A is easy to generate bending in the side that goes out of universal mill, rolled material A be easy in rolling by
It pulls in pedestal.In addition, being produced up and down when the blank shape portion 90 that flange part stretches out such shape bites at milling train
In the case where offset, it is possible to tearing be caused to connect as web-flange because biting flange part rather than web portion using the state
Great Rolling failure as the root of socket part, size deteriorate.
In addition, producing left and right offset when the blank shape portion 92 that web stretches out such shape bites at milling train
In the case of, it is possible to cause because being rolled using the position to flange part tearing as web-flange connection root this
The great Rolling failure of sample, size deteriorate.
In view of the presence of will lead to the problem of such various sizes deteriorate, in previous H profile steel manufacturing technology, such as lead to
The setting between roughing operation and intermediate rolling process is crossed to be used as and cut off position above-mentioned blank shape portion 90, blank shape portion 92
The intermediate blank cut off operation cut off is coped with.
The case where in view of illustrating above by reference to Fig. 7, the present inventor is to inhibition in roughing operation (groove rolling of edging peace)
The technology of the growth of the above-mentioned blank shape portion 90 and blank shape portion 92 of middle formation is studied, and has been obtained and described below has been seen
Solution.
In the manufacturing method of the H profile steel of present embodiment, illustrate to make using for carrying out rolling using Fig. 2~Fig. 6
The purport of the 1st pass K5 of pass K1~the 5th of shape, but using these passes rolling in, carve be equipped with pass hole type roll at
For the structure that can change its roll gap freely.In addition, the change of roll gap also can be real in the rolling appearance of rolled material A
It applies, is also able to carry out the change of drafts.In addition, being for example equipped with by being arranged for making the mobile pressure to change roll gap of hole type roll
The milling train (sizing mill 3, roughing mill 4) of the structure of lower mechanism (hydraulic mechanism, not shown in Fig. 2~Fig. 6) is such to implement
The change of roll gap.
Based on the structure of such milling train, present inventors propose that being rolled using the 1st pass K5 of pass K1~the 5th
When appearance, 1 is carried out by the so-called method for being referred to as rolling roll gap automatic control (Japanese: ダ Block Le piece パ ス rolls)
Rolling appearance at pass or any number of passes.Rolling roll gap automatic control refers to following technology: for example at 1 pass pair
In the case that rolled material A carries out the reversed rolling of multi-pass, in each passage of whole back and forth rolled to rolled material A
In, roll gap only is widened when the section for being rolled the scheduled length of length direction rear end of material A to this carries out rolling appearance,
Keep the drafts at the pass lower than common drafts or makes the drafts 0 at the pass.In addition, implementing the rolling
The pass that roll gap automatically controls is either any pass in the 1st pass K5 of pass K1~the 5th, is also possible to more than two
Multiple passes.
As described above, the blank shape portion 90,92 referred to as fish tail or tongue is rolling in previous manufacturing technology
Bite end and rolling pedals outlet this forms growth at two, it is especially more significant in the growth that outlet is pedaled in rolling, but pass through
Automatically controlling using the rolling roll gap makes the drafts in scheduled section reduce or become 0, so as to inhibit blank shape
The growth in shape portion 90,92.
Fig. 8 is in rolling appearance at the 1st pass K1 in the manufacturing method of the H profile steel of present embodiment using rolling
The outline figure for the case where roll gap automatically controls, is the outline side view observed from side.In addition, for ease of description,
Rolled material A (left side in figure) before illustrating the rolling appearance in some passage in fig. 8, the rolling appearance in the passage
Rolled material A (center in figure) before closing to an end and the rolled material A (figure after the rolling appearance in the passage
In right side).
As shown in figure 8, being made in some passage of the rolling appearance at the 1st pass K1 of present embodiment from rolling
When shape starts to rolling appearance close to an end before until, in order to implement roll gap required for rolling appearance shown in Fig. 2 (on
The interval of hole type roll 20 and lower pass roller 21) implement rolling appearance.On the other hand, it will be tied from the rolling appearance in the passage
In the rolling appearance carried out to predetermined interval L before beam until rolling appearance terminates, to have widened the state (reference of roll gap
Dotted line part in Fig. 8) carry out rolling appearance.Specifically, both pressure can be gradually reduced before to close to an end from rolling appearance
The mode of lower amount periodically widens roll gap, or can also significantly widen roll gap in a manner of so that drafts becomes 0.
In the rolling appearance being implemented, with the drafts of the predetermined interval L shape smaller than the drafts in other sections
State (or predetermined interval L does not have the state of drafts) implements rolling appearance to rolled material A, in the length side of rolled material A
The pressure of so big degree is not implemented upwards.Thus, in the edging stage, it is hardly formed what (a) above by reference to Fig. 7 illustrated
The elongation of the flange part so-called shape defect portion referred to as fish tail bigger than the elongation of web portion.That is, being pedaled out in rolling
The drafts at end, predetermined interval L reduces or becomes 0, therefore inhibits the growth of blank shape portion 90 as above description.
Therefore, intermediate blank cut off operation as above description can be omitted or be simplified, realizes the height of promotion, the rolling of yield rate
Effectization.
In addition, in the case where the edging stage is using reversed rolling, in next passage of the passage illustrated by Fig. 8,
To carry out rolling appearance with contrary direction shown in Fig. 8, therefore above-mentioned predetermined interval L becomes and bites end.At this point, by roller
Gap is set as being able to carry out the roll gap of scheduled rolling appearance, therefore to real as the predetermined interval L for biting end in the passage
Apply rolling appearance.That is, also implementing adequately to roll appearance to predetermined interval L.
Here, illustratively illustrating the 1st pass K1 in fig. 8, but it may be said that each pass tool used in the edging stage
There are same function and effect, rolling roll gap automatic control also can be applied to 1 or multiple passes used in the edging stage.
Referring to Fig. 2~Fig. 6, in the roughing operation of above-mentioned present embodiment, in the edging stage, especially for
The 1st pass K1 of initial grooving is formed in slab end face, for will make using what the segmentaion position of grooving formation was bent
At 3rd pass K3 of shape and the 4th pass K4, blank growth is more significant.The reason is that being cut initially being formed in slab end face
In the process of slot, edging is carried out with stronger restrained condition using the sidewall of pass, reason also resides in, and is being split position
In the process of bending, in bending deformation on width of plate slab direction load predetermined amount pressure and finally with slab end face and hole
Type week face contact state carry out edging.It is possible thereby to it is clear, in the later-described embodiments, it is being equivalent to the 1st pass K1~the 3rd
In G1~G3 of edging at pass K3, blank length mainly grows (referring to Fig.1 0) in G1 and G3.
That is, for the 1st pass K1 and/or the 3rd pass that are likely to form the so-called shape defect portion referred to as fish tail
For K3 later edging appearance pass (being the 3rd pass K3 and the 4th pass K4 in the present embodiment), particularly preferably application is rolled
Roll gap processed automatically controls.
In addition, for the 2nd pass K2 of appearance as the grooving for carrying out further deepening to be formed in the 1st pass K1
For, the growth of shape defect portion (blank part) is smaller, therefore may not necessarily also automatically control using rolling roll gap.
But at the 2nd pass K2 be also, blank part be rolled material end face and pass week face contact state into
Growth of the growth fraction in other passages in the passage of row pressure is big.Thus, in the rolling appearance at the 2nd pass K2
Preferably, in the passage depressed with the state of the end face of rolled material and pass week face contact, make to rolled material
The rolling roll gap that is rolled of predetermined interval of mill length direction rear end compare section other than the predetermined interval
The rolling roll gap rolled is widened and carries out rolling appearance.
In addition, being also possible to the end of rolled material in the predetermined interval that broadening rolling roll gap carries out rolling appearance
Face is not contacted with pass circumferential surface.But the case where the end face of rolled material and the passage of pass week face contact are 1 passages
Under, it is possible to remain the part that do not depressed in the length direction rear end of rolled material, therefore sometimes for being further added by 1
Passage is contacted to modify shape.In such situation etc., Rolling roller can also be carried out in whole passages at the 2nd pass K2
Gap automatically controls.
In addition, Fig. 9 be in the manufacturing method of the H profile steel of present embodiment at the 5th pass K5 (flat appearance pass)
The outline figure for rolling the case where automatically controlling in appearance using rolling roll gap, is approximate vertical view viewed from above.
In addition, for ease of description, the rolled material A (left side in figure) before the rolling appearance in some passage is illustrated in Fig. 9
With the rolled material A (right side in figure) after the rolling appearance in the passage.
As shown in figure 9, at the 5th pass K5 plain barrel pass rolling in be also, it is same as the above-mentioned edging stage, made from rolling
When shape starts to rolling appearance close to an end before until in order to implement roll gap required for rolling appearance shown in fig. 6 implementation
Roll appearance.On the other hand, from before the rolling appearance in the passage closes to an end until rolling appearance terminates to pre-
In the rolling appearance for determining section L progress, rolling appearance is carried out to have widened the state of roll gap.Specifically, both can be with from rolling
Manufacture shape is gradually reduced drafts mode before closing to an end periodically widens roll gap, or can also with so that drafts at
Roll gap is significantly widened for 0 mode.
In the rolling appearance being implemented, with the drafts of the predetermined interval L shape smaller than the drafts in other sections
State (or predetermined interval L does not have the state of drafts) implements rolling appearance to rolled material A, in the length side of rolled material A
Upwards, do not implement the pressure of so big degree to flange part, web portion.Thus, though plain barrel pass rolling sequence in contrast
In the case that the reduction ratio of web portion is bigger than the reduction ratio of flange part, since reduction ratio is inherently minimum, even if being rolled
The elongation in the length direction epiplastron portion of saw lumber A is bigger than the elongation of flange part, as shown in figure 9, will not be formed significantly
The so-called shape defect portion referred to as tongue (referring to (b) of Fig. 7).That is, pedaling outlet, the drafts of predetermined interval L in rolling
It reduces or becomes 0, therefore inhibit the growth of blank shape portion 92 as above description.It therefore, can be as described above
Intermediate blank cut off operation is omitted or simplified like that, realizes the high efficiency of promotion, the rolling of yield rate.
In addition, also reversely being rolled in plain barrel pass rolling sequence, therefore next road of the passage illustrated by Fig. 9
In secondary, to carry out rolling appearance with contrary direction shown in Fig. 9.That is, above-mentioned predetermined interval L in next passage at
To bite end.At this point, roll gap to be set as being able to carry out the roll gap of scheduled rolling appearance, therefore to as biting in the passage
The predetermined interval L at end implements rolling appearance.That is, also implementing adequately to roll appearance to predetermined interval L.But for Fig. 9 institute
For the drafts depressed to predetermined interval L in next passage of the passage of explanation, the pressure in prime passage is needed
Simultaneously plus the drafts in next passage on the basis of lower amount, therefore, in the design of pass schedule, for above-mentioned
It is more important that the drafts that predetermined interval L is depressed is sufficiently carried out research.
More than, referring to Fig. 8 and Fig. 9, respectively illustrate the case where edging stage application rolling roll gap automatically controls (Fig. 8)
The case where roll gap automatically controls (Fig. 9) is rolled in the application of plain barrel pass rolling sequence.In the manufacturer of the H profile steel of present embodiment
In the case where automatically controlling in method using rolling roll gap, the edging stage can be both only applied to (that is, the 1st pass K1~the
The rolling appearance of 4 pass K4), it can also be only applied to plain barrel pass rolling sequence (that is, rolling appearance of the 5th pass K5),
And it also can be applied in peace groove rolling stage in edging stage in the two stages.In any case, can omit or
Person simplifies intermediate blank cut off operation, and it is possible to realize the high efficiencies of the promotion of yield rate, rolling.
In addition, in the case where each rolling appearance stage is using reversed rolling, it both can be in scheduled arbitrary passage
It automatically controls, can also be automatically controlled using rolling roll gap in whole passages using rolling roll gap.Inhibit blank from expectation
The growth in portion with prevent from being formed shape defect portion it is such from the viewpoint of, it is desirable to Rolling roller is applied in whole passages
Gap automatically controls.
In addition, for the case where rolling roll gap that application illustrates referring to Fig. 8 and Fig. 9 automatically controls, it can be arbitrarily
Sets requirement is to have widened the predetermined interval L that the state of roll gap carries out rolling appearance.For example, it is preferable that by referring to Fig. 7's
(a), it will form shape not on the length direction for being rolled material A in previous H profile steel manufacturing technology that (b) of Fig. 7 illustrates
Section L1, the L2 in good portion 90,92 are set as above-mentioned predetermined interval L.
When determining predetermined interval L, need clearly to be rolled the side between the unstable portion of the rolling of material A and stabilizers
Boundary, predetermined interval L include at least unstable portion.If predetermined interval L includes stabilizers, it is likely that in the part range of stabilizers
Roll gap is widened, the residual that do not depressed is generated in stabilizers.However, the pressure that stabilizers carry out occurs partially in rear class passage
The influence of shifting is smaller, it is therefore preferred to, predetermined interval L is set as the full scope comprising unstable portion and expands to stabilizers
Part until degree range.When specifically determining predetermined interval L, based on raw material section, rolled material size, hole
The element of the whole such as type shape, pass schedule determines, thus carry out laboratory experiment, real machine test comes to every in each passage
A passage measures unstable minister's degree, determines appropriate length.
Using the manufacturing method of the H profile steel of present embodiment described above, pass through the upper and lower end parts in rolled material A
(slab end face) is formed grooving and makes the processing bent to the left and right using each section that these groovings are divided right and left, and flange part is formed
80, by carrying out such appearance, thus without the upper and lower end face of rolled material A (slab) is depressed along roughly vertical direction
It is able to carry out the appearance of the thick profile 13 of H-type.That is, with the method always depressed slab end face and carry out roughing that was carried out in the past
It compares, flange width can be made to increase and appearance is carried out to the thick profile of H-type 13, it is biggish as a result, it is possible to manufacture flange width
Final product (H profile steel).
Also, on the basis of above-mentioned function and effect, using the manufacturing method of the H profile steel of present embodiment, in edging rank
Section (that is, rolling appearance of the 1st pass K4 of pass K1~the 4th) and/or plain barrel pass rolling sequence are (that is, the 5th pass
The rolling appearance of K5), by when the predetermined interval L (rearward end when rolling appearance) to rolled material A carries out rolling appearance
Implement so-called rolling roll gap to broadening roll gap to automatically control, so as to inhibit to be formed in previous H profile steel manufacturing technology
Rolled material length direction end shape defect portion growth.Thereby, it is possible to omit or simplify intermediate blank cutting
Process realizes the high efficiency of promotion, the rolling of yield rate.That is, it is most desirable that intermediate blank cut off operation can not be accompanied
Implement roughing operation, intermediate rolling process, whole processes in finishing rolling step, is only that (roughing operation, centre are rolled in whole processes
Process processed, finishing rolling step) after implement blank cutting and can complete the blank part generated on rolled material length direction
It removes.In addition, as needed, it can also stage after roughing operation and before intermediate rolling process or intermediate rolling work
The midway stage (between the rolling pass of intermediate rolling process) of sequence only carries out intermediate blank cutting to the web portion of rolled material
Process.
Especially in the large-scale H profile steel product that web height is 1000mm or more or flange width is 400mm or more
Manufacture in, the weight for being rolled the per unit length of material A is larger, and product extended length when rolling is shorter, therefore blank part
Shared large percentage, the growth of blank part are easy to cause the reduction of yield rate in overall length.Thus, inhibit present embodiment
The technology of the growth of blank part is particularly useful in the manufacture of large-scale H profile steel product.
It this concludes the description of an example of embodiments of the present invention, but the present invention is not limited to the forms of diagram.As long as
It is those skilled in the art, it is contemplated that various modifications or fixed case in the scope of the thought documented by claims,
This is obvious, for these, is understood as also would naturally fall within protection scope of the present invention.
In the above-described embodiment, it illustrates to carry out rolled material A using the 1st pass K4 of pass K1~the 4th this 4 passes
Appearance and the technology of flat appearance rolling is carried out using the 5th pass K5 later, but the pass number for implementing roughing operation is unlimited
In this, more passes also can be used and implement rolling appearance process shown in the 1st pass K4 of pass K1~the 4th.That is, above-mentioned reality
Applying pass structure shown in mode is an example, and the quantity for carving the pass set on sizing mill 3, roughing mill 4 can arbitrarily become
More, it can suitably be changed to properly implement the degree of roughing operation.
In addition, raw material when as manufacture H profile steel, illustrate slab and are illustrated, but other for analogous shape
Raw material, also can of course be using the present invention.That is, for example can also apply to carry out appearance to Hot Metal in Beam Blank raw material to manufacture H
The case where fashioned iron.
Embodiment
Effect of the invention is verified using embodiment.
Hereinafter, firstly, indicating to carry out to H profile steel manufacturing technology previous illustrated by patent document 1 etc. as experimental example 1
Manufacturing method (below be also referred to as wedges method) and the present application technology manufacturing method (being also referred to as split plot design below) progress
The result for the experiment compared.Moreover, whether apply in the above-described embodiment in split plot design as the expression of experimental example 2
The result for the experiment that the case where so-called " rolling roll gap automatically controls " that illustrates is compared.
(experimental example 1)
As a reference example 1, uses based on edging is carried out as the H profile steel manufacturing technology of the wedges method of previous methods, measure
Blank part length (blank length) at this time.On the other hand, as a reference example 2, using Fig. 2~the 1st pass K1 shown in Fig. 4~
3rd pass K3 carries out the edging based on split plot design, measures blank part length at this time.In addition, the condition as this verifying, it will be former
Material plate blank section is set as 1800mm × 300mm, for the wedge angle of the edging of embodiment, in the 1st pass K1 and the 2nd
It is set as 30 ° at pass K2, is set as 90 ° at the 3rd pass K3.In addition, edging amount is the protrusion apical position (wedge at each pass
Shape apical position) drafts.
Figure 10 is the figure for indicating the verification result of reference example 1 (wedges method in figure) and reference example 2 (split plot design in figure)
Table is the chart for indicating the relationship of edging amount (drafts of edging) and blank length in each situation.In addition, in Figure 10
The record of G1~G3 is equivalent to the edging of the 1st pass K3 of pass K1~the 3rd of utilization of above embodiment.In addition, Figure 10's draws
Figure point uses the average value of the blank length at the length direction both ends of rolled material.
As shown in Figure 10, in reference example 1, blank length is grown generally proportionately relative to edging amount, such as is being rolled
When side amount is 600mm, blank length grows into about 250mm.
On the other hand, in reference example 2, although seeing that blank length is somewhat grown, especially in the 2nd pass K2
It can't see the growth of blank part at (G2 in figure), it is known that compared with comparative example, it is suppressed that the growth of blank length.Such as it is rolling
When side amount is 900mm, blank length is limited in about 80mm.
(experimental example 2)
It is not applied as comparative example by using Fig. 2~the 1st pass K1~the 4th shown in fig. 5 pass K4 split plot design
Rolling roll gap automatically controls and carries out edging, measures the blank part length (blank length) at rolled material both ends at this time.Figure 12
It is the chart for indicating the measurement result of comparative example, two kinds of drawing points in chart indicate cutting for the length direction both ends of rolled material
Expect length.
In addition, as embodiment, in using Fig. 2~the 1st pass K1~the 4th shown in fig. 5 pass K4 split plot design,
1st pass K1, the 3rd pass K3, rolling appearance at the 4th pass K4 (corresponding with G1, G3, G4 in figure respectively) whole roads
Rolling roll gap is carried out in secondary to automatically control, and measures the blank part length (blank length) at rolled material both ends at this time.Figure 13 is
Indicate the chart of the measurement result of embodiment, two kinds of drawing points in chart indicate the blank at the length direction both ends of rolled material
Length
In embodiment carry out rolling roll gap automatically control in the case where, from away from rolled material in each rolling pass
Start to widen roll gap at terminal part about 400mm, opens roller in final end.
In addition, the raw material slab used in comparative example and embodiment is that section is 2300mm × 300mm and length is
The slab of 4000mm.In addition, the pass schedule at each pass is as shown in table 1 below.
[table 1]
| Passage | Pass | Roll gap |
| 1 | G1 | 2200 |
| 2 | G1 | 2120 |
| 3 | G2 | 2000 |
| 4 | G2 | 1900 |
| 5 | G2 | 1800 |
| 6 | G2 | 1700 |
| 7 | G2 | 1600 |
| 8 | G2 | 1500 |
| 9 | G2 | 1460 |
| 10 | G3 | 1460 |
| 11 | G3 | 1460 |
| 12 | G3 | 1416 |
| 13 | G4 | 1416 |
| 14 | G4 | 1416 |
Wherein, " roll gap " in table 1 indicates the mutual interval of wedge shape (protrusion) tip portion of the up-down rollers of pass
(distance), it is equivalent in meaning with " the edging amount " of above-mentioned experimental example 1.
According to the comparison of Figure 12, Figure 13 it is found that and not applied the case where application rolling roll gap automatically controls under (Figure 13)
The case where rolling roll gap automatically controls (Figure 12) is compared, it is suppressed that the blank increment at each pass.Especially largely
Inhibit the blank increment at G1, G3, G4 (being equivalent to the 1st pass K1, the 3rd pass K3, the 4th pass K4).For final
For blank length, in the case where application rolling roll gap automatically controls to be slightly less than 40mm, do not applying rolling roll gap automatic
To be slightly less than 90mm in the case where control, automatically controlled by application rolling roll gap, so that blank length be made to become 1/2 or less.
According to the result of above experimental example 2 it is found that the system of the H profile steel automatically controlled in application rolling roll gap of the invention
It makes in technology, the growth of blank length is largely inhibited in the edging stage.As a result, without in previous H profile steel
The intermediate blank cut off operation usually carried out in manufacturing technology can be implemented to roll appearance.That is, realize the promotion of yield rate,
The high efficiency of rolling.
Industrial availability
The present invention can be applied to the manufacture skill for manufacturing H profile steel as raw material such as the slab using rectangular in cross-section
Art.
Description of symbols
1, rolling equipment；2, heating furnace；3, sizing mill；4, roughing mill；5, omnipotent intermediate mill；8, universal finishing mill；9,
Edging mill；11, slab；13, the thick profile of H-type；14, intermediate wood；16, H profile steel product；20, epithyrid roller (the 1st pass)；21, under
Hole type roll (the 1st pass)；25,26, protrusion (the 1st pass)；28,29, grooving (the 1st pass)；30, epithyrid roller (the 2nd hole
Type)；31, lower pass roller (the 2nd pass)；35,36, protrusion (the 2nd pass)；38,39, grooving (the 2nd pass)；40, epithyrid
Roller (the 3rd pass)；41, lower pass roller (the 3rd pass)；45,46, protrusion (the 3rd pass)；48,49, grooving (the 3rd pass)；
50, epithyrid roller (the 4th pass)；51, lower pass roller (the 4th pass)；55,56, protrusion (the 4th pass)；58,59, grooving (
4 passes)；80, flange part；82, web portion；85, epithyrid roller (the 5th pass)；86, lower pass roller (the 5th pass)；90, it 92, cuts
Expect shape portion；K1, the 1st pass；K2, the 2nd pass；K3, the 3rd pass；K4, the 4th pass；K5, the 5th pass (flat appearance pass)；
T, production line；A, it is rolled material.
Claims (11)
1. a kind of manufacturing method of H profile steel comprising roughing operation, intermediate rolling process, finishing rolling step, the manufacture of the H profile steel
Method is characterized in that,
It carves in the milling train for carrying out the roughing operation equipped with the more of 5 or more for roll to rolled material appearance
A pass,
1 passage appearance or multiple passage appearance are carried out to rolled material at multiple pass,
The 1st pass and the 2nd pass in the multiple pass are formed with to be vertically formed with the width direction of rolled material and cut
Slot and form the protrusion of segmentaion position in rolled material end,
The pass other than final pass after the 3rd pass in the multiple pass, which is formed with, is connected to the grooving
And the protrusion for gradually bending the segmentaion position of formation,
Final pass in the multiple pass is flat appearance pass,
At the pass other than final pass after the 2nd pass in the multiple pass, more than at least one passage
Appearance in, depressed with being rolled end face and the state of pass week face contact of material,
More than at least one passage of the rolling appearance at the multiple pass, after making the mill length direction to rolled material
The rolling roll gap that the predetermined interval of end is rolled compares the Rolling roller that the section other than the predetermined interval is rolled
Gap widens and carries out rolling appearance.
2. the manufacturing method of H profile steel according to claim 1, which is characterized in that
It is 25 ° or more and 40 ° or less in the top end part angle for the protrusion that the 1st pass and the 2nd pass are formed.
3. the manufacturing method of H profile steel according to claim 1 or 2, which is characterized in that
In whole passages of rolling appearance at the 1st pass in the multiple pass, make the mill length to rolled material
What the section that the rolling roll gap that the predetermined interval of direction rear end is rolled compares other than the predetermined interval was rolled
Rolling roll gap is widened and carries out rolling appearance.
4. the manufacturing method of H profile steel described in any one of claim 1 to 3, which is characterized in that
In at least the 3rd pass in the multiple pass and whole passages of the rolling appearance at the 4th pass, make to rolled
The rolling roll gap that the predetermined interval of the mill length direction rear end of material is rolled compares the area other than the predetermined interval
Between rolled rolling roll gap broadening and carry out rolling appearance.
5. the manufacturing method of H profile steel according to any one of claims 1 to 4, which is characterized in that
In the rolling appearance at the 2nd pass in the multiple pass, to be rolled the end face of material and the hole of the 2nd pass
Type week face contact the passage depressed of state in, make to the predetermined interval of the mill length direction rear end of rolled material into
The rolling roll gap of row rolling compares the rolling roll gap broadening that the section other than the predetermined interval is rolled and is rolled
Appearance.
6. the manufacturing method of H profile steel according to any one of claims 1 to 5, which is characterized in that
In whole passages of rolling appearance at final pass in the multiple pass, make the mill length to rolled material
What the section that the rolling roll gap that the predetermined interval of direction rear end is rolled compares other than the predetermined interval was rolled
Rolling roll gap is widened and carries out rolling appearance.
7. the manufacturing method of H profile steel described according to claim 1~any one of 6, which is characterized in that
Whole roads of rolling appearance at whole passes other than the 1st pass and final pass in the multiple pass
In secondary, the rolling roll gap for rolling the predetermined interval to the mill length direction rear end of rolled material is compared in addition to this is pre-
Determine the rolling roll gap broadening that the section except section is rolled and carries out rolling appearance.
8. the manufacturing method of H profile steel according to any one of claims 1 to 7, which is characterized in that
Stage after the roughing operation and before the intermediate rolling process, only in the web portion progress of rolled material
Between blank cut off operation.
9. the manufacturing method of H profile steel according to any one of claims 1 to 7, which is characterized in that
After the roughing operation, intermediate rolling process, finishing rolling step are fully completed, the first length removed in rolled material
Spend the blank shape portion that direction end is formed.
10. the manufacturing method of H profile steel described according to claim 1~any one of 9, which is characterized in that
The screw-down for changing the roll gap of the hole type roll of the milling train is equipped in the milling train for carrying out the roughing operation.
11. a kind of H profile steel product is manufactured using the manufacturing method of H profile steel described in any one of claim 1~10
, which is characterized in that,
Web height is 1000mm or more or flange width is 400mm or more.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-090165 | 2016-04-28 | ||
| JP2016090165 | 2016-04-28 | ||
| PCT/JP2017/016180 WO2017188179A1 (en) | 2016-04-28 | 2017-04-24 | H-shaped steel manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109070157A true CN109070157A (en) | 2018-12-21 |
Family
ID=60160496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780024850.7A Pending CN109070157A (en) | 2016-04-28 | 2017-04-24 | The manufacturing method of H profile steel |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20190022719A1 (en) |
| EP (1) | EP3412370A4 (en) |
| JP (1) | JP6614339B2 (en) |
| CN (1) | CN109070157A (en) |
| WO (1) | WO2017188179A1 (en) |
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| JPS58188501A (en) * | 1982-04-30 | 1983-11-04 | Sumitomo Metal Ind Ltd | Production of rough shape steel ingot for h-shaped steel |
| JPS58215204A (en) * | 1982-06-09 | 1983-12-14 | Kawasaki Steel Corp | Rolling method of h-shaped steel |
| JPS6182903A (en) * | 1984-09-28 | 1986-04-26 | Sumitomo Metal Ind Ltd | Rolling method of h-beam having projection on its flange inner surface |
| CN1072620A (en) * | 1991-10-18 | 1993-06-02 | Sms舒路曼-斯玛公司 | The hot-rolling method of metal tape and hot-rolling mill |
| CN1076146A (en) * | 1992-03-07 | 1993-09-15 | Sms舒路曼-斯玛公司 | The method and apparatus of straightening I-steel |
| JP2002045902A (en) * | 2000-08-02 | 2002-02-12 | Sumitomo Metal Ind Ltd | Method for rolling large size wide flange shape |
| CN103203357A (en) * | 2013-03-05 | 2013-07-17 | 安阳市常兴轧钢有限责任公司 | Rolling process of T-shaped steel on transverse three-roller rolling mill |
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| US2890735A (en) * | 1957-07-17 | 1959-06-16 | Inland Steel Co | Tongue bender |
| US4106318A (en) * | 1974-04-10 | 1978-08-15 | Nippon Steel Corporation | Method and apparatus for rolling metallic material |
| US4202192A (en) * | 1978-06-21 | 1980-05-13 | Nippon Steel Corporation | Apparatus for controlling the position of roll in the direction of the roll axis |
| JPS5953121B2 (en) * | 1981-03-05 | 1984-12-24 | 川崎製鉄株式会社 | Rolling method for widening large material for rough shaped steel billet and its rolling roll |
| JPS5918124B2 (en) * | 1981-07-10 | 1984-04-25 | 住友金属工業株式会社 | Manufacturing method of rough shaped steel billet |
| JPS6192701A (en) * | 1984-10-11 | 1986-05-10 | Nippon Kokan Kk <Nkk> | Rolling method of rough h-shaped steel piece |
| JPS61126930A (en) * | 1984-11-26 | 1986-06-14 | Kawasaki Steel Corp | Shaping method of h-shape steel flange tip |
| US5167166A (en) * | 1991-10-11 | 1992-12-01 | Teleflex Incorporated | Rack and roller core element adjust |
| JP3065877B2 (en) * | 1994-03-29 | 2000-07-17 | 新日本製鐵株式会社 | Rough rolling method for H-shaped steel slab |
| JP3678003B2 (en) * | 1998-06-03 | 2005-08-03 | Ｊｆｅスチール株式会社 | Rolling method of rough steel slab |
| IT1315029B1 (en) * | 2000-08-28 | 2003-01-27 | Danieli Off Mecc | METHOD AND LINE FOR THE LAMINATION OF RAILS OR OTHER SECTIONS |
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2017
- 2017-04-24 JP JP2018514581A patent/JP6614339B2/en active Active
- 2017-04-24 WO PCT/JP2017/016180 patent/WO2017188179A1/en active Application Filing
- 2017-04-24 US US16/082,334 patent/US20190022719A1/en not_active Abandoned
- 2017-04-24 CN CN201780024850.7A patent/CN109070157A/en active Pending
- 2017-04-24 EP EP17789461.5A patent/EP3412370A4/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58188501A (en) * | 1982-04-30 | 1983-11-04 | Sumitomo Metal Ind Ltd | Production of rough shape steel ingot for h-shaped steel |
| JPS58215204A (en) * | 1982-06-09 | 1983-12-14 | Kawasaki Steel Corp | Rolling method of h-shaped steel |
| JPS6182903A (en) * | 1984-09-28 | 1986-04-26 | Sumitomo Metal Ind Ltd | Rolling method of h-beam having projection on its flange inner surface |
| CN1072620A (en) * | 1991-10-18 | 1993-06-02 | Sms舒路曼-斯玛公司 | The hot-rolling method of metal tape and hot-rolling mill |
| CN1076146A (en) * | 1992-03-07 | 1993-09-15 | Sms舒路曼-斯玛公司 | The method and apparatus of straightening I-steel |
| JP2002045902A (en) * | 2000-08-02 | 2002-02-12 | Sumitomo Metal Ind Ltd | Method for rolling large size wide flange shape |
| CN103203357A (en) * | 2013-03-05 | 2013-07-17 | 安阳市常兴轧钢有限责任公司 | Rolling process of T-shaped steel on transverse three-roller rolling mill |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2017188179A1 (en) | 2018-11-29 |
| JP6614339B2 (en) | 2019-12-04 |
| WO2017188179A1 (en) | 2017-11-02 |
| US20190022719A1 (en) | 2019-01-24 |
| EP3412370A4 (en) | 2019-10-23 |
| EP3412370A1 (en) | 2018-12-12 |
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Address after: Tokyo, Japan, Japan Applicant after: Nippon Iron & Steel Corporation Address before: Tokyo, Japan, Japan Applicant before: Nippon Steel Corporation |
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Application publication date: 20181221 |