JPS58112602A - Rolling method for shape steel and rolling mill train thereof - Google Patents

Abstract

PURPOSE:To form rolled web surfaces to smooth surfaces in the stage of using split sleeve type rolls for the horizontal rolls of universal mills by providing recesses to the mating surfaces of sleeves and shaping and rolling the same with the next edger rolls. CONSTITUTION:In the stage of using split sleeve type rolls wherein sleeves 10, 11, 12 are fitted on arbors 13 for the horizontal rolls of universal mills, recessed grooves 14 centering at the mating surfaces of the respective sleeves are beforehand formed on the outside circumferences in the mating surface parts. Projecting parts 15 by the grooves 14 are formed in the web parts of H-shaped steel or the like rolled with such horizontal rolls. Said steel is subjected to rolling reduction with the edger rolls 16 of the next stage to finish the parts 15 on the web surfaces to smooth surfaces. The rolls 16 in this case not only edge the flange end parts of the H-shaped steel but also bring the central parts thereof into contact with the web surfaces, thereby forming the smooth web surfaces having no flaws.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of rolling section steel and a rolling mill train therefor, which is employed in the case of a 22 parsal electric mill using split sleeve type horizontal rolls.

For example, universal rolls used for rough rolling of H-section steel require horizontal rolls with different roll widths for each series, and the number of rolls in stock is limited because the worn parts of the side walls are ground and reused. It will be huge. For this reason, various nine-horizontal rolls have been proposed in which the sleeve to be fitted onto the arm is divided into a plurality of parts in the axial direction and the divided sleeves are integrated using various methods to make the width adjustable.

In such a split sleeve type roll, the gap is the seam between the split sleeves. In other words, it is a contact between rigid bodies, and it is possible to eliminate the gap by finishing the contact surfaces, but since sleeves need compatibility and wear, it is impossible to completely eliminate the gap. As a result, the seam portion widens due to the rolling load, and a serpentine protrusion 1 as shown in FIG. 1 is generated in the portion of the web rolled at this portion. If a Kueppu with such a protrusion 1 is rolled, a lap eave 2 as shown in Fig. 1 (Q) will be produced.Such a lap eave 2 will be a serious defect and will not be a 7111 product. do not have.

This invention was proposed in view of these circumstances.
The purpose is to provide a method of rolling a section steel and a rolling mill train thereof that can obtain a smooth web surface without generating thorn-like protrusions.

In the method of rolling a section steel according to the present invention, the thorn-like protrusions on the web surface produced by a conventional universal roll are folded into gentle protrusions that do not form eaves, and these protrusions are rolled down by the edger roll in the next stage. , to obtain a smooth web surface.

The rolling mill row according to the present invention includes a universal roll having a nine-sleeve type horizontal roll in which a concave groove is formed in the mating @ portion of the sleeve divided portion, and a convex portion surrounding the narrow web formed by the concave groove. This invention consists of an edge roll having an edge roll capable of rolling down the wood, and is made to obtain a smooth web surface with a relatively simple improvement. do. Figure 2 shows the horizontal roll of a universal mill for rough rolling, divided into three groups: 10, 11, l.
21) t-f-har 3f (J4114 kerare-c
I'm coming. A concave shape 14 centered on the seam is formed on the outside of the seam of each sleeve. This concave $1
4 has a shape that can form a gentle convex portion 15 on the web surface, and 7 - is about 1/2 of the roll reduction amount, and its depth is 1/2 to 1/2 of the roll lid. It is preferable to set it as 173 degrees, and the shape may be a cedar or a circular arc shape.

A convex s16 is formed on the web surface of the 9H section steel rolled by such a split sleeve type horizontal roll, but 4
This convex portion 15 is pressed by the edger roll 16 of the next stage.
, smooth the web surface. In other words, with a normal edger mill, only the 7th edge is etched, but the 3rd edge is only etched.
As shown in the figure, the center part of the edger roll 16 is sharpened so that it comes into contact with the web surface, and the convex part 1
Perform 5 reductions.

Next, Fig. 5 shows a split sleeve type horizontal roll.
It has a concave groove 17 formed in the center.
This can be obtained by matching the outer diameter of the groove 11 with the root diameter of the concave groove 14. In this case, Etsjarro is the third
These are the edge rollers 16 and 1 shown in the figure.

Next, the above-mentioned split sleeve type horizontal pull slit 4゜-
For the fixed force method, a double sleeve method as shown in Fig. 7 is suitable. That is, sleeves 10.11.
When the intermediate sleeve 18 is provided between the intermediate sleeve 12 and the aperture 13, a hydraulic pressure fi is created between the intermediate sleeve 18 and the aperture 13.
19 is provided, and a nonflammable liquid is supplied from the pressurizing device 20 to the hydraulic chamber 19 through the rotary joint 21 and the communication hole 22 to inflate the intermediate sleeve 18 in the radial direction. .12 is to be fixed.

Removal of the sleeves 10, 11, 12 is facilitated by reducing the pressure of the supply liquid.

As described above, according to the piezoelectric method according to the present invention, a smooth web surface can be obtained without generating folded eaves.

Further, according to the pressing machine train according to the present invention, the occurrence of folding eaves can be prevented by adding a relatively simple improvement to the ordinary universal oil and edge roller.

[Brief explanation of the drawing]

Figure 1, @, 0 is a schematic cross-sectional view showing the occurrence of conventional folding eaves, Figure 2 is a cross-sectional view showing the universal roll of a rolling mill row according to the present invention, Figure 3 is a similar rolling mill. FIG. 4 is a perspective view of a similar rolling mill row, and FIG.
FIG. 6 is a cross-sectional view showing an example of a universal oil and an edge-all, and FIG. 7 is a cross-sectional view showing a sleeve OII fixing means. 1... φ protrusion, 2... lap eave, 1G, 11.12... sleeve, 13... arm μ, 14... concave groove, 15... convex part, 16... edger ■-Rule, 17... Concave groove, 1
8... Intermediate sleeve, 19... Hydraulic pressure base, 20...
Pressurizing device, 21...Rotary gas cylinder India, 22...
Communication hole.

Claims (3)

[Claims] (1): In a method of piezoelectricizing a section steel using split sleeve type horizontal rolls for L-niversal mill horizontal rolls, the protrusions on the web surface caused by the seams of the split parts of the front split sleeve type horizontal rolls are folded in and used as eaves. 1. A method of rolling a section steel, characterized by forming a convex portion in a shape such that it does not form, and rolling down the convex portion with a horizontal roll in the next stage to obtain a smooth web surface. (2) An everlasting structure having a nine-segment sleeve type horizontal roll in which a concave groove is formed at the seam of the sleeve division part, and an edger roll that can roll down the convex part of the section steel web surface formed by the concave groove. 1. A rolling mill row for piezoelectric shaped steel, characterized in that it consists of a rolling mill having an edger structure. (3) The split sleeve type horizontal roll consists of a split sleeve on the outer periphery, an intermediate sleeve and an arc in contact with the split sleeve, and is characterized in that the chain intermediate sleeve can expand and contract in the radial direction by the flow body. A rolling mill train for copper immersion rolling according to claim 2.