CN211437481U

CN211437481U - Hole pattern structure, cogging mill and production line for rolling I-steel by slab

Info

Publication number: CN211437481U
Application number: CN201921894678.3U
Authority: CN
Inventors: 马立新; 纪广胜; 纪建华; 张志慧; 温小杰; 马云飞; 张志栋; 刘利华; 韩小强; 李孝星; 张福利
Original assignee: Hebei Jinxi Iron And Steel Group Co ltd
Current assignee: Hebei Jinxi Iron And Steel Group Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-09-08
Anticipated expiration: 2029-11-05

Abstract

The utility model provides a pass structure of a slab rolling I-shaped steel, a cogging mill with the pass structure and a production line, which relate to the technical field of section steel rolling passes and comprise a first vertical hole, a second vertical hole, a first flat hole and a second flat hole; the first vertical hole is provided with a bulge and a first opening; a second opening is arranged on the second vertical hole; the two sides of the first flat hole are symmetrically provided with press holes, and the two press holes are provided with third openings; and forming holes are symmetrically arranged on two sides of the second flat hole, and fourth openings are arranged on the two forming holes. The utility model provides a pass structure of rolling I-steel of slab utilizes first upright hole and second to found the hole and suppresses the vertical slab of placing, makes the slab effectively extend, has improved the quality and the performance of blank, utilizes the shaping hole and the effective shaping that the shaping hole realized the I-steel edge of a wing, makes the blank furthest be close the dimensional requirement of end product, has reduced the pass of follow-up finish rolling process, has improved the rolling efficiency of I-steel.

Description

Hole pattern structure, cogging mill and production line for rolling I-steel by slab

Technical Field

The utility model belongs to the technical field of the rolling pass of shaped steel, more specifically say, relate to a pass structure of slab rolling shaped steel, be equipped with cogging mill and production line of this pass structure.

Background

In the technical field of building construction, I-steel can be often used. The i-steel is also called a steel beam, and is a long steel bar with an i-shaped cross section. The I-steel includes common I-steel and light I-steel. The specification is expressed by height, leg thickness and waist thickness, and the number can also be used to express the main dimensions of the specification. Such as 18 h-beam, which means an 18cm high h-beam. If the height of the I-steel is the same, the number can be indicated by adding an angle code a or b or c, such as 36a, 36b, 36c and the like.

At present, I-shaped steel with the height of more than 400mm is mostly rolled by using a special-shaped blank and a rectangular blank, the rectangular blank is generally rolled by 7 times during rolling, and then the product can be obtained by performing finish rolling by 5 times. Because the product has poor formability after the cogging process is finished and the number of subsequent required finish rolling passes is large, the rolling efficiency is low, and the requirements of low cost and high yield are difficult to meet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pass structure, cogging mill and production line of the rolling shaped steel of slab to it is poor to have the shaping degree in the I-steel is rolling among the solution prior art, the many technical problem of required finish rolling pass.

In order to achieve the above object, the utility model adopts the following technical scheme: the hole pattern structure for rolling I-shaped steel by using the plate blank is formed by splicing an upper roller and a lower roller of a rolling mill and comprises a first vertical hole, a second vertical hole, a first flat hole and a second flat hole; the top and the bottom of the first vertical hole are respectively provided with a bulge used for being abutted against the side surface of the short side of the rolled piece, and two sides of the first vertical hole are symmetrically provided with first openings; second openings are symmetrically arranged on two sides of the second vertical hole; the two sides of the first flat hole are symmetrically provided with profiling holes, the profiling holes respectively extend towards the upper side and the lower side of the first flat hole, and the outer sides of the upper ends of the two profiling holes are respectively provided with a third opening; forming holes are symmetrically formed in two sides of the second flat hole, the forming holes respectively extend towards the upper side and the lower side of the second flat hole, and fourth openings are respectively formed in the outer sides of the middle parts of the two pressing holes; the first vertical hole, the second vertical hole, the first flat hole and the second flat hole are sequentially arranged from the transmission side to the operation side of the rolling mill.

As another embodiment of the present application, the height of the profiling hole located at the upper portion of the first flat hole is greater than the height of the profiling hole located at the lower portion of the first flat hole.

As another embodiment of the present application, the outer side surface of the profiling hole is a plane, and the upper portion of the outer side surface of the profiling hole is inclined outward.

As another embodiment of the application, the outer side surface of the forming hole is in circular arc transition with the fourth opening.

As another embodiment of the present application, the height of the molding holes is smaller than the height of the molding holes, and the height of the second flat holes is smaller than the height of the first flat holes.

As another embodiment of the present application, a first arc transition is adopted between the first flat hole and the profiling hole, a second arc transition is adopted between the second flat hole and the forming hole, and the radius of the first arc is larger than that of the second arc.

As another embodiment of the present application, the minimum height of the first flat hole is greater than the minimum height of the second flat hole.

As another embodiment of the present application, the heights of the first opening, the second opening, and the fourth opening are uniform.

A H-shaped steel cogging mill comprises a rolling mill and a hole pattern structure which is arranged between an upper roller and a lower roller of the rolling mill and is used for rolling H-shaped steel by using a plate blank.

A joist steel production line comprises a joist steel cogging mill and a universal continuous rolling mill unit.

The utility model provides a pass structure of slab rolling I-steel's beneficial effect lies in: compared with the prior art, the utility model provides a pass structure of rolling I-steel of slab utilizes first upright hole and second to found the hole and suppress the vertical slab of placing, make the slab obtain effective extension, the quality and the performance of blank have been improved, then utilize the shaping hole of the pressure type hole of first flat hole and both sides and the shaping hole of second flat hole and both sides to realize the effective shaping on the edge of a wing of I-steel, realize the effective shaping of slab at the cogging in-process, make the dimensional requirement that is close to the final product of blank furthest, the pass of follow-up finish rolling process has been reduced, the rolling efficiency of I-steel has been improved, and the yield is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a pass structure of a slab rolled i-steel according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the first vertical hole in FIG. 1;

FIG. 3 is a schematic structural view of the second vertical hole in FIG. 1;

FIG. 4 is a schematic view of the first flat hole of FIG. 1;

fig. 5 is a schematic structural view of the second flat hole in fig. 1.

Wherein, in the figures, the respective reference numerals:

100. a first vertical hole; 110. a protrusion; 120. a first opening; 200. a second vertical hole; 210. a second opening; 300. a first flat hole; 310. molding the hole; 320. a third opening; 330. a first arc; 400. a second flat hole; 410. forming holes; 420. a fourth opening; 430. a second arc; 610. upper roll; 620. and a lower roller.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 5, a pass structure, a cogging mill and a production line of slab rolled section steel according to the present invention will now be described. The hole pattern structure of the slab rolling I-shaped steel comprises a first vertical hole 100, a second vertical hole 200, a first flat hole 300 and a second flat hole 400; the top and the bottom of the first vertical hole 100 are respectively provided with a bulge 110 used for abutting against the side surface of the short side of the rolled piece, and two sides of the first vertical hole 100 are symmetrically provided with first openings 120; second openings 210 are symmetrically arranged at two sides of the second vertical hole 200; the first flat hole 300 is symmetrically provided with press holes 310 at both sides thereof, the press holes 310 respectively extend to the upper and lower sides of the first flat hole 300, and the outer sides of the upper ends of the two press holes 310 are respectively provided with third openings 320; forming holes 410 are symmetrically arranged at two sides of the second flat hole 400, the forming holes 410 respectively extend towards the upper side and the lower side of the second flat hole 400, and fourth openings 420 are respectively arranged at the outer sides of the middle parts of the two forming holes 410; the first vertical hole 100, the second vertical hole 200, the first flat hole 300, and the second flat hole 400 are provided in this order from the drive side to the operating side of the rolling mill. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The utility model provides a pair of pass structure of rolling I-steel of slab, compared with the prior art, the utility model provides a pass structure of rolling I-steel of slab utilizes first upright hole 100 and second to found hole 200 and suppress the vertical slab of placing, reduce the slab width so that adapt to the dimensional requirement of flat rolling, the quality and the performance of blank have been improved simultaneously, then put the slab into the state of keeping flat by vertical state, the die hole 310 of utilizing first flat hole 300 and its both sides and the shaping hole 410 of second flat hole 400 and its both sides realize the extension and the effective shaping of blank to the I-steel edge of a wing position, realize the effective shaping of blank at the cogging in-process, make the dimensional requirement of blank furthest's being close product, the finish rolling procedure's of follow-up rolling pass has been reduced, the rolling efficiency of I-steel has been improved, the output is improved.

In this embodiment, the slab that utilizes vertical placing carries out the rolling of I-steel, that is to say, the face of slab sets up along the direction that is on a parallel with the vertical direction, makes the protruding 110 of first upright hole 100 and the short side contact of slab, and the short side of slab is the top surface and the bottom surface of the slab of vertical state, and at this moment, has great clearance between the both sides of slab and the both sides of first upright hole 100, cooperation protruding 110's setting offsets at the top surface and the bottom surface of rolling process arch 110 and slab, and the position that lies in the slab both sides with the blank extends to first upright hole 100, has reduced the width of slab. The use of this slab is different from the mode that directly uses the rectangle blank to carry out rolling, because there is great clearance between the both sides of slab and the first both sides that found hole 100, and the extension of blank to the two side flange departments of I-steel is convenient for realize in the contact between the top surface of arch 110 and slab and the bottom surface, because the existence in clearance, and this clearance is great, is convenient for quick extension of realization blank, is favorable to improving the shaping efficiency of cogging process.

After the blank of the slab is spread to the flanges on both sides, the inward depressions are formed on the top and bottom surfaces of the slab, so that the second vertical hole 200 does not need to be provided with a portion for spreading the slab to both sides, and the height of the slab can be further reduced by directly using the box-shaped hole.

After the second vertical hole 200 is rolled, the slab is changed from a vertical state to a horizontal state, the first flat hole 300 enables the blank of the slab at the web position of the i-beam to extend into the two profiling holes 310, and the second flat hole 400 further enables the slab to be transversely elongated, and simultaneously the height of the slab is reduced, so that the dimension specification required by the i-beam is maximally approached.

As an embodiment of the present invention, referring to fig. 1 and 3, the height of the molding hole 310 at the upper portion of the first hole 300 is greater than the height of the molding hole 310 at the lower portion of the first hole 300. In this embodiment, the profiling holes 310 extend above and below the first flat hole 300 respectively, but the extending heights are different, and the height of the profiling hole 310 above the first flat hole 300 is greater than the height of the profiling hole 310 below the first flat hole 300, so that the reduction amount above the first flat hole 300 is increased, and the blank is more fully extended to the upper and lower flange positions of the first flat hole 300.

Meanwhile, the third opening 320 is arranged at the outer side of the top end close to the profiling hole 310, so that the blank can be effectively extended in the lower space, the problem that the flange is folded due to the fact that the third opening 320 is arranged in the middle of the height direction is solved, the problem that the blank is large in flow amount and is not easy to form towards the flange position is solved, the compactness of the blank in the rolling process is effectively improved, meanwhile, the effective extension of the blank towards the flange position of the I-shaped steel is also guaranteed, and the forming efficiency is improved.

Further, the inner wall of the profiling hole 310 above the first flat hole 300 is inclined to the side close to the first flat hole 300, and the blank close to the first flat hole 300 can smoothly extend to the upper flange along the inclined side surface, so that the smoothness of the rolling piece process is ensured.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 and 4, the outer side surface of the profiling hole 310 is a plane, and the upper portion of the outer side surface of the profiling hole 310 inclines outward. The outer side surface of the profiling hole 310 is provided in a planar form, and the third opening 320 is provided at the outer side of the top of the profiling hole 310, so that smooth extension of a rolled piece in the vertical direction in the profiling hole 310 can be realized, and the flow of a blank to the flange side can be improved to the maximum extent.

The third opening 320 is arranged at the outer side of the top of the profiling hole 310, the trend of the blank can be limited, the blank extends towards two sides of the first flat hole 300 on the basis of the second vertical hole 200, the problem of overflow from the opening due to large flow amount of the blank in the extending process is avoided, and the forming efficiency of the rolled piece is improved.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to fig. 3, the outer side surface of the forming hole 410 and the fourth opening 420 are in arc transition. After the rolled piece is rolled by the first flat hole 300 for three times, the blank is accumulated towards the flange, on the basis, the height of the blank at the flange is adjusted through the forming hole 410, the height of the flange is reduced, meanwhile, the blank is concentrated and accumulated on the inner side of the fourth opening 420, and the form of arc transition is beneficial to extension of the blank, so that the forming efficiency is improved.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 4 and fig. 5, the height of the forming hole 410 is smaller than the height of the pressing hole 310, and the height of the second flat hole 400 is smaller than the height of the first flat hole 300. After the rolling of the first flat hole 300 of three passes, the flange of the rolled piece has a preliminary shape, the rolled piece is rolled through the second flat hole 400, so that the size of the flange is closer to the size parameter of the rolled piece required by finish rolling, the height of the second flat hole 400 is reduced, the length is increased, the position of a web plate of the rolled piece is thinned, the length of the web plate is increased, and meanwhile, the blank is extended to the flanges at two sides. In the process of rolling, the second flat hole 400 adopts a two-pass rolling mode, so that the rolled piece approaches to the size of the rolled piece required by the finish rolling procedure to the maximum extent.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 3, it is excessive to adopt the first circular arc 330 between the first flat hole 300 and the profiling hole 310, and it is excessive to adopt the second circular arc 430 between the second flat hole 400 and the forming hole 410, and the radius of the first circular arc 330 is greater than the radius of the second circular arc 430. The profiling holes 310 of the first flat hole 300 are used for realizing the primary forming of the flanges of the rolled piece, and here, the blank of the rolled piece close to the first flat hole 300 extends to the profiling holes 310 at two sides, namely to the positions of two flanges of the I-shaped steel, so that the size requirement required by finish rolling is met to the maximum extent.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 4 to 5, the minimum height of the first flat hole 300 is greater than the minimum height of the second flat hole 400. The second flat hole 400 rolls and thins the web plate position of the rolled piece, and gradually enables the rolled piece to extend and change towards the actual size of the I-shaped steel. The processing from the first flat hole 300 to the second flat hole 400 realizes the gradual forming of the I-shaped steel web from thick to thin.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 5, the heights of the first opening 120, the second opening 210 and the fourth opening 420 are the same. The third opening 320 is arranged at the top end of the forming hole 310 in order to realize the extension of the blank to the flange side of the i-steel, the first opening 120, the second opening 210 and the fourth opening 420 at other positions are distributed at the middle positions of the two sides of the corresponding hole pattern in the height direction, so that the uniform stress on the two sides of the web of the i-steel is realized conveniently, the suitability of the processing of the rolled piece in the hole patterns can be improved by setting the height to be the same, the smooth extension of the blank is ensured, and the rolling efficiency is improved.

The first embodiment is as follows:

taking the cogging rolling of 45 h-beam as an example, the processing parameters of each pass are set as follows, the blank is a plate blank with the section size of 685 × 180mm, and is rolled for 1 pass at the pass of the first vertical hole 100, then rolled for 1 pass at the pass of the second vertical hole 200, then rolled for 3 passes at the pass of the first flat hole 300, and finally rolled for 2 passes at the pass of the second flat hole 400, so that the whole cogging rolling process is completed.

After cogging rolling, finish rolling is carried out at a universal continuous rolling unit, and rolling is carried out by adopting 3-pass rolling and straightening, thus obtaining a finished product.

The dimensions of the specific rolling pass are shown in table 1.

TABLE 1

Pass	Hole pattern	Roller spacing mm	Total depth mm of hole pattern	Width mm	Speed m/s
						1	100	460.0	190	245	2
2	200	386.0	500	245	2.5
						3	300	100.0	246	620	2.5
4	300	51.0	246	620	2.5
						5	300	22.0	246	625	3
6	400	35.0	171	630	3
						7	400	25.0	171	625	3

The utility model also provides a I-steel blooming machine. The i-beam cogging mill includes a rolling mill and a pass structure for rolling i-beams from slabs disposed between an upper roll 610 and a lower roll 620 of the rolling mill. In this embodiment, a pass structure for rolling an i-steel by using a slab is arranged between the upper roller 610 and the lower roller 620 on the rolling mill, and through the pass structure, the speed of the i-steel cogging process is increased, so that a rolled piece is closer to the size of the i-steel, rolling passes in the subsequent finish rolling process are reduced, and finish rolling of an i-steel product can be completed only by performing finish rolling for three passes subsequently.

The utility model also provides a I-steel production line. The I-steel production line comprises an I-steel cogging mill and a universal continuous rolling unit. In the embodiment, when the universal continuous rolling mill set rolls rolled pieces, finish rolling of the products can be completed only through three-pass finish rolling, so that the processing efficiency is improved, and the rolling times are reduced. The utility model provides a I-steel production line has adopted the hole shape structure of the rolling I-steel of slab, the effectual shaping efficiency that improves the I-steel, has reduced rolling pass, has improved the production efficiency of product.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The pass structure of the slab rolling I-steel is formed by splicing an upper roller and a lower roller of a rolling mill, and is characterized by comprising the following steps:

the top and the bottom of the first vertical hole are respectively provided with a bulge used for abutting against the side face of the short side of the rolled piece, and two sides of the first vertical hole are symmetrically provided with first openings;

the two sides of the second vertical hole are symmetrically provided with second openings;

the first flat hole is symmetrically provided with profiling holes at two sides, the profiling holes respectively extend towards the upper side and the lower side of the first flat hole, and the outer sides of the upper ends of the two profiling holes are respectively provided with a third opening; and

forming holes are symmetrically formed in two sides of the second flat hole, the forming holes respectively extend towards the upper side and the lower side of the second flat hole, and fourth openings are respectively formed in the outer sides of the middle parts of the two pressing holes; the first vertical hole, the second vertical hole, the first flat hole and the second flat hole are sequentially arranged from the transmission side to the operation side of the rolling mill.

2. A pass structure in a slab rolled i-steel as claimed in claim 1 wherein the height of the profiling hole above the first flat hole is greater than the height of the profiling hole below the first flat hole.

3. A pass structure in a slab rolled i-steel as claimed in claim 1 wherein the outer sides of the profiling holes are planar and the upper portions of the outer sides of the profiling holes are inclined outwardly.

4. A pass structure in which an i-steel is slab rolled as claimed in claim 1 wherein the outside of the forming hole transitions in a circular arc with the fourth opening.

5. A pass structure in a slab rolled i-steel as claimed in claim 1 wherein the height of the forming holes is less than the height of the profiling holes and the height of the second flat holes is less than the height of the first flat holes.

6. A hole pattern structure for rolling I-steel from a slab as claimed in any one of claims 1 to 5, wherein a first circular arc transition is adopted between the first flat hole and the forming hole, a second circular arc transition is adopted between the second flat hole and the forming hole, and the radius of the first circular arc is larger than that of the second circular arc.

7. A hole pattern structure according to any one of claims 1 to 5, wherein the minimum height of the first flat hole is greater than the minimum height of the second flat hole.

8. A pass structure for slab rolling I-steel according to any one of claims 1 to 5 wherein the first, second and fourth openings are of uniform height.

9. An i-beam cogging mill comprising a rolling mill and a pass structure for rolling an i-beam from a slab as claimed in any one of claims 1 to 8 disposed between upper and lower rolls of the rolling mill.

10. An i-steel production line comprising an i-steel cogging mill according to claim 9 and a universal continuous rolling mill train.