CN103736726B - Continuous rolling machine group - Google Patents
Continuous rolling machine group Download PDFInfo
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- CN103736726B CN103736726B CN201310749966.0A CN201310749966A CN103736726B CN 103736726 B CN103736726 B CN 103736726B CN 201310749966 A CN201310749966 A CN 201310749966A CN 103736726 B CN103736726 B CN 103736726B
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Abstract
The invention discloses a continuous rolling machine group. The continuous rolling machine group comprises N grooves which are rolled in turn, where N is a positive integer and N is not less than 3; every groove comprises four leg portions and the web area which is formed by opposite rolling surfaces of an upper roller and a lower roller; isosceles triangle indentations are formed in the opposite rolling surfaces of the upper roller and the lower roller of the web area of every groove from the first groove to the N-1 groove; the positions of vertices of the indentations which are formed in the rolling surfaces of the upper rollers are corresponding to each other in the longitudinal direction of the grooves; the positions of vertices of the indentations which are formed in the rolling surfaces of the lower rollers are corresponding to each other in the longitudinal direction of the grooves; the maximum thickness of the web area of every groove is smaller than that corresponding to the largest nip angle of the grooves; the difference between the height of the indentations of the ith groove and the height of the indentations of the i+1th groove is larger than the rolling reduction of the web area of the <i+1>th groove, wherein i is not less than 1 and not more than N-2. According to the continuous rolling machine group, the accurate alignment nipping of roller pieces can be achieved.
Description
Technical field
The present invention relates to hot-rolled steel section field, specifically, the present invention relates to a kind of Continuous mill train for making rolled piece accurate contraposition nip.
Background technology
In the design process of Pass, blank aligns nips mainly in order to ensure the correct distribution of the various piece amount of metal of shaped steel.Nip or the correct distribution of amount of metal if can not realize aligning accurately, finally shaping shaped steel then can be caused to there is larger deviation with the shaped steel designed in advance, cause the amount of metal of each several part of shaped steel to exceed specified standard or error, qualified shaped steel cannot be rolled out.
At present for the design of Pass, aligning the method for nipping is that four legs that last groove rolling goes out can enter 2/3rds of four legs of the correspondence of next pass smoothly.But for said method, mainly nipping smoothly to guarantee, but can not ensure to align accurately, therefore, in aligning, generally all there is deviation.Especially, in crimp rolling mill practice, rolled piece certainly will will bear larger turning pair in pass.If also adopt said method, under the effect of turning pair, likely there is certain rotation in rolled piece in pass, causes rolled piece to align and there is deviation, and finally can affect dimensional accuracy and the quality of product.
Summary of the invention
The object of the present invention is to provide a kind of Continuous mill train, the pass of described Continuous mill train can ensure that rolled piece accurately aligns in the operation of rolling and nip.
To achieve these goals, according to an aspect of the present invention, provide a kind of Continuous mill train, described Continuous mill train comprises the N number of pass for being rolled successively, wherein, N is positive integer, and N >=3, the web region that each pass includes four legs and formed by the opposing rolling surfaces of upper and lower two rolls, for the formation of being all formed with the recessed of isosceles triangle to the opposing rolling surfaces of two rolls up and down of the web region of each pass in N-1 pass from first pass, wherein: the position of recessed summit on pass is longitudinal be formed on the rolled surface of topping roll is corresponding, and the position of recessed summit on pass is longitudinal be formed on the rolled surface of bottom roll is corresponding, the maximum gauge of the web region of each pass is all less than the maximum gauge corresponding with the maximum nip angle of pass, the difference in height of the recessed height of i-th pass and the recessed of the i-th+1 pass is greater than the drafts of the web region of the i-th+1 pass, and wherein i is positive integer, and 1≤i≤N-2.
Preferably, the two recessed edge tails of isosceles triangle and the rolled surface arc transition of corresponding roll.
Preferably, the recessed summit of isosceles triangle is positioned on the center line of the rolled surface of corresponding roll.
According to a further aspect in the invention, provide a kind of Continuous mill train, described Continuous mill train comprises the N number of pass for being rolled successively, wherein, N is positive integer, and N >=3, the web region that each pass includes four legs and formed by the opposing rolling surfaces of upper and lower two rolls, for the formation of being all formed with the recessed of isosceles triangle to the rolled surface of the topping roll of the web region of each pass in N-1 pass from first pass, wherein: the position of recessed summit on pass is longitudinal be formed on the rolled surface of topping roll is corresponding, the maximum gauge of the web region of each pass is all less than the maximum gauge corresponding with the maximum nip angle of pass, the difference in height of the recessed height of i-th pass and the recessed of the i-th+1 pass is greater than the drafts of the web region of the i-th+1 pass, wherein 1≤i≤N-2.
Preferably, the two recessed edge tails of isosceles triangle and the rolled surface arc transition of corresponding roll.
Preferably, the recessed summit of isosceles triangle is positioned on the center line of the rolled surface of corresponding roll.
According to a further aspect in the invention, provide a kind of Continuous mill train, described Continuous mill train comprises the N number of pass for being rolled successively, wherein, N is positive integer, and N >=3, the web region that each pass includes four legs and formed by the opposing rolling surfaces of upper and lower two rolls, for the formation of being all formed with the recessed of isosceles triangle to the rolled surface of the bottom roll of the web region of each pass in N-1 pass from first pass, wherein: the position of recessed summit on pass is longitudinal be formed on the rolled surface of bottom roll is corresponding, the maximum gauge of the web region of each pass is all less than the maximum gauge corresponding with the maximum nip angle of pass, the difference in height of the recessed height of i-th pass and the recessed of the i-th+1 pass is greater than the drafts of the web region of the i-th+1 pass, wherein 1≤i≤N-2.
Preferably, the two recessed edge tails of isosceles triangle and the rolled surface arc transition of corresponding roll.
Preferably, the recessed summit of isosceles triangle is positioned on the center line of the rolled surface of corresponding roll.
By the Continuous mill train that embodiments of the invention provide, the accurate contraposition that its pass had can realize rolled piece is nipped, and is conducive to improving product size precision and product quality, reduces the regulation time to rolled piece, enhances productivity.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of i-th pass according to an embodiment of the invention;
Fig. 2 is the schematic diagram of the i-th+1 pass according to an embodiment of the invention.
Detailed description of the invention
In order to enable those skilled in the art better understand the present invention, below by describing the present invention in conjunction with the accompanying drawings and embodiments, wherein, identical label represents same parts all the time.
Fig. 1 is the schematic diagram of i-th pass according to an embodiment of the invention, and Fig. 2 is the schematic diagram of the i-th+1 pass according to an embodiment of the invention.
See figures.1.and.2, according to embodiments of the invention, provide a kind of Continuous mill train for rolled section steel.When utilizing this Continuous mill train to be rolled shaped steel, need to carry out multiple tracks rolling, to ensure size and the quality of rolling shaped steel out.Generally speaking, Continuous mill train all has the many groups of top and bottom rolls matched, and is all formed with a pass often organizing between top and bottom rolls, to be rolled rolled piece successively, from last one roll rolling out be just shaping shaped steel.
In an embodiment of the present invention, Continuous mill train comprises the roll that N group matches, namely, have N number of pass 1, wherein, N is positive integer, and each pass 1 includes four legs 11 and web region 12, web region 12 is formed by the relative rolled surface of upper and lower two rolls.
According to the first embodiment of the present invention, recessed for the formation of first pass to the relative rolled surface of the top and bottom rolls of N-1 pass is all formed, this is recessed in isosceles triangle shape.That is, the rolled surface of top and bottom rolls forming last pass (that is, N number of pass) is not formed recessed, ensure finally corresponding with the shape of desired shaped steel from the shape of this groove rolling shaped steel out.
As shown in Figure 1, in i-th pass (wherein i is positive integer, and 1≤i≤N-2), on the recessed rolled surface 21 being respectively formed at topping roll 2 of isosceles triangle and on the rolled surface 31 of bottom roll 3.As shown in Figure 2, in the i-th+1 pass, on the recessed rolled surface 41 being respectively formed at topping roll 4 of isosceles triangle and on the rolled surface 51 of bottom roll 5.
That is, the projection protruded towards roll 2 and 3 is formed in the upper and lower of web region 12, thus the thickness of the various piece of web region 12 is different, make nip angle everywhere different, therefore, when nipping rolled piece, the rolled piece angle of nipping needs with pass that nip angle is corresponding could be nipped everywhere, so rolled piece can be made accurately to nip and be rolled, and can avoid producing because of turning pair align bias phenomenon.
The isosceles triangle be formed on the rolled surface of topping roll is recessed into, its summit at pass 1 longitudinally (namely, direction along L) on position all corresponding, equally, be formed in summit that the isosceles triangle on the rolled surface of bottom roll is recessed into pass 1 longitudinally on position corresponding.That is, for same rolled piece, the position that each recessed summit is in contact with it is all identical, thus avoids due to the not corresponding caused problem that can not normally nip of vertex position.In addition, vertex position welcome layout pass 1 is longitudinal that isosceles triangle is recessed, as long as meet above-mentioned requirements.
In a preferred embodiment, as depicted in figs. 1 and 2, the summit that isosceles triangle is recessed into can be positioned on the center line P of the rolled surface of corresponding roll, to make rolled piece stressed comparatively even in the part of both sides, recessed summit.In addition, the end of two length of sides that isosceles triangle is recessed into can adopt the form of arc transition on the rolled surface of corresponding roll, concentrates to avoid the stress in the operation of rolling.
In order to ensure to nip normally, the maximum gauge of the web region 12 of each pass 1 should all be less than and the maximum gauge corresponding to the maximum nip angle of this pass 1.Such as, as shown in Figure 1, in i-th pass, the maximum gauge of web region 12 should be the thickness H between recessed 21 and the summit of recessed 31, shown in figure 2 in the i-th+1 pass, the maximum gauge of web region 12 should be the thickness H between recessed 41 and the summit of recessed 51.
Simultaneously, for adjacent two passes, such as, for i-th pass and the i-th+1 pass, recessed height i-th pass side and the difference between the recessed height of the i-th+1 pass the same side should be greater than the drafts of web region when the i-th+1 pass is rolled, to ensure when being rolled rolled piece, the corresponding projection of the waist (mid portion) of rolled piece reduces gradually.Such as, the drafts of the web region that the difference in height that adjacent two pass the same sides are recessed into can be greater than in a rear pass is about 1-2mm.Certainly, according to the roll of different model and blank, this value can suitably be regulated.
Particularly, the maximum gauge of each web region 12 suitably can be selected according to the size of the drafts of web region and nip angle.
Such as, for φ 750 roll, adopt 150 × 150 blanks, the required drafts realized of one of them pass is 20mm, the height that so isosceles triangle of this pass side is recessed can be less than or equal to 20mm, and two length of sides that isosceles triangle is recessed into can be less than 2/3 of web region length and be greater than 1/2 of web region length.
According to a second embodiment of the present invention, recessed for the formation of what first pass to the rolled surface of the topping roll of N-1 pass is all formed in isosceles triangle shape.With similar in the first embodiment be, the position of recessed summit on pass is longitudinal be formed on the rolled surface of topping roll is corresponding, the maximum gauge of the web region of each pass is all less than the maximum gauge corresponding with the maximum nip angle of pass, and the recessed difference in height of the recessed height of i-th pass and the i-th+1 pass is greater than the drafts of the web region of the i-th+1 pass, wherein 1≤i≤N-2.Other features for each pass in the present embodiment are identical with the first embodiment, do not repeat them here.
According to the third embodiment of the invention, recessed for the formation of what first pass to the rolled surface of the bottom roll of N-1 pass is all formed in isosceles triangle shape.With similar in the first embodiment be, the position of recessed summit on pass is longitudinal be formed on the rolled surface of bottom roll is corresponding, the maximum gauge of the web region of each pass is all less than the maximum gauge corresponding with the maximum nip angle of pass, the difference in height of the recessed height of i-th pass and the recessed of the i-th+1 pass is greater than the drafts of the web region of the i-th+1 pass, wherein 1≤i≤N-2.Other features for each pass in the present embodiment are identical with the first embodiment, do not repeat them here.
By the Continuous mill train that embodiments of the invention provide, the accurate contraposition that its pass had can realize rolled piece is nipped, and is conducive to improving product size precision and product quality, reduces the regulation time to rolled piece, enhances productivity.
It should be noted that, Continuous mill train provided by the present invention, being recessed into that each roll is formed might not be isosceles triangle, also can be other arbitrary shapes, as long as in each adjacent pass, its shape is corresponding, and it is corresponding with the shape of the shaped steel of final molding to be decreased to the shape of last pass gradually.In addition, also might not be formed recessed on the rolled surface of roll, suitable projection is also fine.
In addition, the thought of hole type design provided by the present invention can also be used for other passes, is not limited to the Pass shown in accompanying drawing, such as, can also be applied to angle pass, T-steel pass etc.
Above Pass provided by the present invention is described in detail; although show and describe some embodiments of the present invention; but those skilled in the art should understand that; when not departing from by the principle of the present invention of claim and its scope of equivalents thereof and spirit; can to modify to these embodiments and perfect, these amendments and improve also should in protection scope of the present invention.
Claims (9)
1. a Continuous mill train, comprise the N number of pass for being rolled successively, wherein, N is positive integer, and N >=3, the web region that each pass includes four legs and formed by the opposing rolling surfaces of upper and lower two rolls, is characterized in that, for the formation of being all formed with the recessed of isosceles triangle to the opposing rolling surfaces of two rolls up and down of the web region of each pass in N-1 pass from first pass, wherein:
The position of recessed summit on pass is longitudinal be formed on the rolled surface of each topping roll is all corresponding, and the position of recessed summit on pass is longitudinal be formed on the rolled surface of each bottom roll is all corresponding;
The maximum gauge of the web region of each pass is all less than the maximum gauge corresponding with the maximum nip angle of pass;
The difference in height of the recessed height of i-th pass and the recessed of the i-th+1 pass is greater than the drafts of the web region of the i-th+1 pass, wherein 1≤i≤N-2.
2. Continuous mill train according to claim 1, is characterized in that, the two recessed edge tails of isosceles triangle and the rolled surface arc transition of corresponding roll.
3. Continuous mill train according to claim 1, is characterized in that, the recessed summit of isosceles triangle is positioned on the center line of the rolled surface of corresponding roll.
4. a Continuous mill train, comprise the N number of pass for being rolled successively, wherein, N is positive integer, and N >=3, the web region that each pass includes four legs and formed by the opposing rolling surfaces of upper and lower two rolls, is characterized in that, for the formation of being all formed with the recessed of isosceles triangle to the rolled surface of the topping roll of the web region of each pass in N-1 pass from first pass, wherein:
The position of recessed summit on pass is longitudinal be formed on the rolled surface of each topping roll is all corresponding;
The maximum gauge of the web region of each pass is all less than the maximum gauge corresponding with the maximum nip angle of pass;
The difference in height of the recessed height of i-th pass and the recessed of the i-th+1 pass is greater than the drafts of the web region of the i-th+1 pass, wherein 1≤i≤N-2.
5. Continuous mill train according to claim 4, is characterized in that, the two recessed edge tails of isosceles triangle and the rolled surface arc transition of corresponding roll.
6. Continuous mill train according to claim 4, is characterized in that, the recessed summit of isosceles triangle is positioned on the center line of the rolled surface of corresponding roll.
7. a Continuous mill train, comprise the N number of pass for being rolled successively, wherein, N is positive integer, and N >=3, the web region that each pass includes four legs and formed by the opposing rolling surfaces of upper and lower two rolls, is characterized in that, for the formation of being all formed with the recessed of isosceles triangle to the rolled surface of the bottom roll of the web region of each pass in N-1 pass from first pass, wherein:
The position of recessed summit on pass is longitudinal be formed on the rolled surface of each bottom roll is all corresponding;
The maximum gauge of the web region of each pass is all less than the maximum gauge corresponding with the maximum nip angle of pass;
The difference in height of the recessed height of i-th pass and the recessed of the i-th+1 pass is greater than the drafts of the web region of the i-th+1 pass, wherein 1≤i≤N-2.
8. Continuous mill train according to claim 7, is characterized in that, the two recessed edge tails of isosceles triangle and the rolled surface arc transition of corresponding roll.
9. Continuous mill train according to claim 7, is characterized in that, the recessed summit of isosceles triangle is positioned on the center line of the rolled surface of corresponding roll.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310749966.0A CN103736726B (en) | 2013-12-31 | 2013-12-31 | Continuous rolling machine group |
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| CN201310749966.0A CN103736726B (en) | 2013-12-31 | 2013-12-31 | Continuous rolling machine group |
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| CN103736726A CN103736726A (en) | 2014-04-23 |
| CN103736726B true CN103736726B (en) | 2015-07-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU966976A1 (en) * | 1979-12-28 | 1984-02-23 | Западно-Сибирский Металлургический Завод Им.50-Летия Великого Октября | Method for continuously rolling i-sections |
| 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 |
| JP2804335B2 (en) * | 1990-02-27 | 1998-09-24 | 川崎製鉄株式会社 | Rolling method for section steel |
| JPH08215702A (en) * | 1995-02-16 | 1996-08-27 | Nippon Steel Corp | Rolling method of shape having flange and web and rolling device train |
| CN101337233A (en) * | 2008-06-26 | 2009-01-07 | 莱芜钢铁股份有限公司 | Rolling mill technique of special-shaped wide strip |
| CN203343172U (en) * | 2013-07-19 | 2013-12-18 | 莱芜钢铁集团有限公司 | Crawler steel rolling roll dual-pass |
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