CN103056160A - X-I short-process rolling unit for H-shaped steel - Google Patents

Abstract

The invention discloses an XI short-flow rolling unit for H-shaped steel, which comprises a vertical universal rough rolling mill, an edger and a vertical universal finishing mill arranged in sequence, and the rolls of the vertical universal rough rolling mill are surrounded by X-shaped rolling mills. Making pass, the top and bottom of the X-shaped rolling pass are the pass of the H-shaped steel flange; the roll faces of the two vertical rollers of the edger are provided with the pass of rolling the H-shaped steel flange; The rolls of the vertical universal finishing mill enclose an I-shaped rolling pass, and the upper and lower parts of the I-shaped rolling pass are the passes of the H-shaped steel flange. The invention adopts the vertical XI short-flow rolling mill to roll H-shaped steel, which has the advantages of easy metal flow and easy forming of products during X-pass rolling, which can reduce roll wear and improve roll utilization; and the rolled pieces are placed vertically Rolling prevents the cooling water from accumulating in a large amount on the rolled piece for a long time, and the cooling speed of each part of the rolled piece is more uniform, thereby improving the yield and reducing energy consumption; in addition, it has the advantages of short rolling process and low investment cost.

Description

X-I Short Process Rolling Unit for H Beam

technical field

The invention relates to a rolling mill for H-shaped steel, in particular to a short-flow rolling mill for H-shaped steel.

Background technique

At present, hot-rolled H-beams are generally rolled and produced by universal rolling mills. The upper and lower horizontal rolls and left and right vertical rolls of the universal rolling mills jointly enclose the cross-section of H-beams. As described in the patent US5553475A, its cross-sectional shape is H-shaped, and the H-shaped steel is rolled in a horizontal manner. The upper and lower horizontal rolls are driving rolls driven by belts, and the left and right vertical rolls are driven rolls. X shape, the horizontal X-H rolling method, the X-groove rolling makes the metal easy to flow and form during rolling, which can reduce rolling energy consumption, reduce roll wear, and improve roll utilization. However, since hot rolling production requires cooling water to cool the rolls, the cooling water must accumulate in the groove of the H-shaped steel, which accelerates the cooling of the web on the one hand, and on the other hand makes the cooling of the upper and lower parts of the H-shaped steel section asymmetrical. The web itself is thinner than the flange, which also exacerbates the uneven cooling rate of the web and flange, often causing deformation of the H-beam after rolling, such as web warping, waving, eccentricity, etc. Low. The existing vertical rolling method proposed, as described in the patent CN 100448557C, turns over the rolled piece after rough rolling and performs vertical rolling, but the continuous rolling method adopted has many rolling stands and a long rolling process, especially Especially when rolling large and medium-sized H-beams, the investment and production costs are high.

Contents of the invention

In view of this, the purpose of the present invention is to provide a kind of X-I short flow rolling mill of H-shaped steel, to keep the advantages of X-groove rolling, and rolling by placing the rolled piece vertically, so that the cooling water cannot be rolled Long-term accumulation on the workpiece, so that the cooling condition of the rolled piece is better, and the yield rate is improved; in addition, the rolling process is shortened, and the investment and production cost is reduced.

The X-I short-flow rolling mill of the H-shaped steel of the present invention comprises a vertical universal rough rolling mill, an edge rolling mill and a vertical universal finishing mill arranged in the order of the rough rolling-edge rolling-finish rolling process, and the edge rolling mills are two Roller vertical edging mill or four-roller universal edging mill; the rolls of the vertical universal roughing mill are surrounded by an X-shaped rolling pass, and the middle part of the X-shaped rolling pass is the pass of the H-shaped steel web , the top and bottom of the X-shaped rolling pass are the passes of the H-shaped steel flange; the roll surfaces of the two vertical rolls of the edger are provided with the pass of rolling the H-shaped steel flange; The rolls of the type universal finishing mill form an I-shaped rolling pass, the middle part of the I-shaped rolling pass is the pass of the H-shaped steel web, and the upper and lower parts of the I-shaped rolling pass are the H-shaped steel wings edge hole.

Further, the vertical universal roughing mill includes two vertical rolls with driving devices and two horizontal rolls driven by the rolling stock;

Further, the vertical universal finishing mill includes two vertical rolls with a driving device and two horizontal rolls driven by the rolling stock, and the surface of the vertical rolls of the vertical universal finishing mill that cooperates with the flange of the H-shaped steel for the conical surface.

Beneficial effects of the present invention:

1. The X-I short-flow rolling mill for H-shaped steel of the present invention adopts the vertical X-I short-flow rolling mill to roll H-shaped steel, which has the advantages of easy flow of metal and easy forming of products during X-pass rolling, and can reduce roll wear. Improve roll utilization.

2. The X-I short-flow rolling unit of the H-shaped steel of the present invention places the rolled piece vertically for rolling, so that the cooling water cannot accumulate in a large amount on the rolled piece for a long time, and the cooling speed of each part of the rolled piece is more uniform, thereby improving the yield , and reduce energy consumption.

3. The X-I short-flow rolling unit for H-shaped steel of the present invention has three-stand rolling mills arranged in a compact order, reversible reciprocating rolling, shorter rolling process, and low equipment investment cost.

4. The X-I short-flow rolling mill of the H-shaped steel of the present invention, the four-roller vertical universal edger can conveniently form the required rolling pass by adjusting the reduction during reciprocating rolling, and improve the rolling stability. And can effectively reduce product rolling defects.

Description of drawings

Fig. 1 is the three-stand rolling train schematic diagram of the X-I short process rolling mill train of H-shaped steel of the present invention;

Fig. 2 is the three-stand rolling mill schematic diagram of the X-I short flow rolling mill mill of H-shaped steel of the present invention;

Fig. 3 is a schematic diagram of the rolling deformation of the H-shaped steel flange during rolling by a two-roller vertical edger.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, the X-I short flow rolling mill of the H-beam of the present embodiment comprises a vertical universal roughing mill 1, an edger 2 and a vertical universal finishing mill arranged in the order of rough rolling-edge rolling-finish rolling process. Rolling mill 3, the edger 2 is a two-roller vertical edger; the rolls of the vertical universal roughing mill 1 are surrounded by an X-shaped rolling pass, and the middle part of the X-shaped rolling pass is an H-shaped steel The pass of the web 4, the upper and lower parts of the X-shaped rolling pass are the passes of the H-shaped steel flange 5; the roll surfaces of the two vertical rollers of the edger 2 are provided with rolled H-shaped steel wings The pass of the edge 5; the rolls of the vertical universal finishing mill 3 surround an I-shaped rolling pass, and the middle part of the I-shaped rolling pass is the pass of the H-shaped steel web 4, and the I-shaped rolling pass The top and bottom of the hole pattern are the hole pattern of the H-shaped steel flange 5.

In this embodiment, the edging machine 2 is one frame. Of course, in different embodiments, two or three edging machines 2 can also be arranged sequentially at the same time according to rolling needs, so as to flexibly set each rolling pass. The rolling pass.

The rolling process of the X-I short-flow rolling mill of H-shaped steel in this embodiment is as follows: first, the rolled billet is vertically placed, enters the X-shaped rolling pass of the vertical universal roughing mill 1, and the cross-section of the rolled piece is rolled into X shape; then, the rolled billet enters the edge rolling machine 2 to roll the flange edge, and controls the width of the H-shaped steel flange; finally, the rolled billet enters the I-shaped rolling pass of the vertical universal finishing mill 3, and the cross section of the rolled piece Rolled into an I shape, that is, an H shape placed vertically. During the rolling process, the desired product shape is finally rolled out through roll gap adjustment and reversible rolling for several passes.

In this embodiment, the edge rolling machine 2 is a two-roll vertical edge rolling machine, and the equipment cost is low; but during rolling, because the two-roll vertical edge rolling machine has no reliable support restrictions on the outer surface of the H-shaped steel flange , When the rolling reduction is large or when rolling thin-walled steel, etc., the flange is prone to deformation as shown in Figure 3.

Therefore in different embodiments, as shown in Figure 2, described edging machine 2 can adopt four-roller universal edging machine to replace two-roller vertical edging machine, and four-roller vertical universal edging machine has a pair of belt drives The vertical roller 6 and a pair of driven horizontal rollers 7, the vertical roller 6 is used to control the width of the H-shaped steel flange, the driven horizontal roller 7 mainly plays the role of supporting and limiting the deformation of the flange, and the four rollers together form the edge Hole type. The four-roller vertical universal edger can easily form the required rolling pass size for each pass by adjusting the reduction during reciprocating rolling. The four-roller vertical universal edging machine can improve rolling stability and effectively reduce product rolling defects.

The X-I short-flow rolling mill of H-shaped steel in this embodiment adopts the vertical X-I short-flow rolling mill to roll H-shaped steel, which has the advantages of easy flow of metal and easy forming of products during X-pass rolling, which can reduce roll wear and improve The utilization rate of the roll is improved; and the rolled piece is placed vertically for rolling, so that the cooling water cannot accumulate in large quantities on the rolled piece for a long time, and the cooling speed of each part of the rolled piece is more uniform, thereby improving the yield and reducing energy consumption.

As an improvement to this embodiment, the vertical universal roughing mill 1 includes two vertical rolls 8 with driving devices and two horizontal rolls 9 driven by the rolling stock. The contact area between the vertical rolls 8 and the rolling stock is large, and the drive Strong force can ensure the stable movement of the rolled piece.

As an improvement to this embodiment, the vertical universal finishing mill 3 includes two vertical rolls 10 with driving devices and two horizontal rolls 11 driven by the rolling stock, the vertical rolls 10 of the vertical universal finishing mill The surface matched with the flange of the H-shaped steel is a conical surface. In the specific implementation, the angle between the generatrix of the conical surface and the axis is the best within the range of 0-10°; the conical surface structure is conducive to metal flow, which can reduce roll wear and The utilization rate of the roll is improved; at the same time, the contact area between the vertical roll 10 and the rolling piece is large, and the driving force is large, which can ensure the stable movement of the rolling piece.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (3)

1. the X-I of a H shaped steel lacks the rolling unit of flow process, it is characterized in that: comprise vertical universal roughing mill, edging mill and the vertical universal finishing mill arranged by roughing-edging-finish-rolling process flow sequence, described edging mill is the vertical edging mill of two rollers or the omnipotent edging mill of four rollers; The roll of described vertical universal roughing mill surrounds the X-shaped rolling groove, and the middle part of described X-shaped rolling groove is the pass of H shape steel web, and the upper and lower of described X-shaped rolling groove is the pass of H section steel flange; Be provided with the pass on the rolled h-section steel beam edge of a wing on the roll surface of two edger rolls of described edging mill; The roll of described vertical universal finishing mill surrounds I shape rolling groove, and the middle part of described I shape rolling groove is the pass of H shape steel web, and the upper and lower of described I shape rolling groove is the pass of H section steel flange.

2. the X-I of described H shaped steel lacks the rolling unit of flow process according to claim 1, it is characterized in that: described vertical universal roughing mill comprises two with vertical rolls and two horizontal rolls that driven by rolled piece of drive unit.

3. the X-I of described H shaped steel lacks the rolling unit of flow process according to claim 1, it is characterized in that: described vertical universal finishing mill comprises two with vertical rolls and two horizontal rolls that driven by rolled piece of drive unit, and the face that the vertical rolls of described vertical universal finishing mill cooperate with the edge of a wing of H shaped steel is taper seat.

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