JPH0790249B2 - Shaped steel rolling equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus suitable for rolling a section steel having a web and a flange, particularly an H section steel, and in rolling the H section steel. It aims to reduce the deviation of the center of the web that was difficult to avoid.

(Prior Art) A steel material such as an H-section steel is generally rolled by a rolling mill consisting of a combination of a breakdown mill, a rough universal mill, an edger mill and a finishing universal mill, and in recent years, H produced by hot rolling is used. Since the dimensions of shaped steels have become extremely large and the specifications required for structures to which such H-shaped steels are applied have become strict, it is required that the H-shaped steels themselves have high dimensional accuracy. It has started to be done. In particular, in the case of H-section steel, when connecting a plurality of H-section steels continuously by bolts or welding, the center of the flange width and the center of the web thickness may not match (deviation of the web center). In some cases, a step is formed at the joint portion of the structure, which causes a problem in function or appearance of the structure.

As a document relating to this point, for example, Japanese Patent Laid-Open No. 54-8150 is referred. Although the technique disclosed in the document is effective in improving the dimensional accuracy of the shaped steel, the size of the shaped steel is fixed. Therefore, every time the size of the shaped steel to be rolled is changed, it is necessary to change the rolls and the guides, resulting in a significant decrease in productivity.

(Problems to be Solved by the Invention) In the rolling of shaped steel, the present invention makes it possible to minimize the frequency of roll replacement and guide replacement even when the size of the shaped steel to be rolled is changed, and the dimensional accuracy is improved. In particular, it is an object of the present invention to propose a rolling mill capable of minimizing the deviation of the web center.

(Means for Solving the Problems) The present invention relates to a rolling mill for shaped steel provided with a universal rolling mill and an edger rolling mill, and rolls on the inlet side of the universal rolling mill in contact with the flange tip of the rolling material. An inlet side guide consisting of a combination of a drum-shaped roller that can be moved up and down and a guide body that sandwiches the web of the rolling material up and down and can be moved up and down, left and right, and the flange of the rolling material on the exit side. An edger rolling machine, which is equipped with a drum-shaped roller that can move up and down and rolls in contact with the tip, and which is detachably attached to the housing of the universal rolling machine,
Rolling of shaped steel characterized in that an edger rolling machine having a roll with a cylinder that comes into contact with the web and the inner surface of the flange of the rolling material is installed near the exit side of the edger rolling machine installed in the universal rolling machine. It is a device.
Here, the edger rolling machine, which is arranged close to the exit side of the edger rolling machine installed in the universal rolling machine, has at least two different types of rolling rolls on the same rotating shaft,
The housing of the edger rolling mill is provided with shift means for moving it in a direction intersecting the rolling pass line in a horizontal plane.

1 (a) to 1 (d) show an example of a rolling apparatus according to the present invention, in which 1 is a horizontal roll 1a and a vertical roll.
1b is a universal rolling mill, 2 is an inlet side guide arranged on the inlet side of the universal rolling mill 1, and the inlet side guide 2 is in contact with the flange tip h _a of the rolling material h and rolls up and down. It is composed of a drum-shaped roller 2a which can be moved up and down and a guide body 2b which is vertically sandwiched with a web w of a rolling material h and which can be shifted vertically and horizontally. Here, in the present invention, an example is shown in which the hourglass roller 2a is installed on the entrance side guide 2 so as to be able to cope with rolling materials h of different sizes, but only the portion corresponding to the flange f of the rolling material h is the first. Any roller may be used as long as it has a divergent taper. The 3 is a edger rolling mill provided detachably to the housing of the rolling machine at the delivery side of the universal rolling mill 1, the edger rolling mill 3 to roll in contact with the flange tip h _a rolled material h vertically Further, it is provided with a drum-shaped roller 3a that can move up and down, and a penetrating guide 3b that guides and guides the material h that has passed through the universal rolling mill 1. Penetration guide here
A roller 3c having the same shape as the hourglass roller 3a may be provided on the 3b. Further, 4 is an edger rolling machine which is arranged close to the exit side of the edger rolling machine 3 installed in the universal rolling machine 1, and this edger rolling machine 4 has a role as a pinch roll for pulling out the rolling material 1 and a rolling material h. A roll 4a with a drum having a roll drum contacting the inner surfaces of the web w and the flange f and a plate-shaped guide 4b are provided. The edger rolling mill 4 can be arranged with the above-mentioned body roll 4a, as shown in FIG. 2, on the same rotating shaft, such as flat rolls having different roll shapes. In this case, in the housing of the rolling mill. Is provided with shift means for moving the roll in a direction intersecting the rolling pass line in the horizontal plane, and the roll is shifted together with the housing in accordance with the shape of the rolling material h. Here, a hydraulic cylinder or the like is advantageously used as the shift means.

(Operation) In rolling H-section steel, web thickness (t), flange thickness (s), flange width (r) or web height (H)
It is important to roll so as to have a predetermined size as much as possible, and in this respect, it has been possible to obtain a comparatively satisfactory shaped steel product even by the conventional method. However, avoiding deviation of the center of the web, that is, each dimension from the surface of the web to the tip of the flange as shown in Fig. 3 (a).
It is difficult to make all l ₁ , l ₂ , l ₃ , and l ₄ uniform, so that it occurs when H-shaped steels are continuously connected by welding or bolts as shown in Fig. 3 (b). The occurrence of the step C was inevitable.

In the present invention, when the rolled material h is passed through the rolling apparatus configured as described above, the deviation of the web center is first corrected between the entry side guide 2 and the universal rolling mill 1, and then the rolled material is rolled by the edger rolling mill 3. The flange width of h was reduced, and the edger rolling machine 4 was used to correct the reduction of the flange width and the deviation of the center of the web. Therefore, especially when rolling a large shaped steel with a flange width of over 300 mm. The large deviation of the center of the web can be made very small. The transportation path of the above-mentioned rolling material h is universal rolling mill 1 → edger rolling mill 3 → edger rolling mill 4 and in the reverse direction including this, that is, as edger rolling mill 4 → edger rolling mill → universal rolling mill 1. Alternatively, the dimensional accuracy can be further improved by repeating this alternately a plurality of times.

When the edger rolling mill 3 is not driven,
If the rolling amount of the rolled material h is large, the rolled material h may become a bite after passing through the universal rolling mill 1. However, in the present invention, it is close to the exit side of the edger rolling mill installed in the universal rolling mill 1. Since the roll installed in the arranged edger rolling machine 4 also serves as a pinch roll,
There is no such happiness. Further, if a roll as shown in FIG. 2 is applied to the edger rolling machine 4 and the rolling machine is shifted according to the shape of the rolling material h, not only H-section steel but also thick plate can be produced with the same equipment. Different ones can be rolled and equipment can be shared.

(Effect of the Invention) Thus, according to the present invention, it is possible to obtain a shaped steel product with high dimensional accuracy. Further, since rolling equipment can be shared when rolling shaped steels of different sizes or steels of different types, the cost involved can be reduced as much as possible.

[Brief description of drawings]

1 (a) to (d) and FIG. 2 are configuration explanatory views of the rolling apparatus according to the present invention, and FIGS. 3 (a) and (b) show a cross section of the H-section steel and a connection state of the H-section steel. It is a figure. 1 …… Universal rolling mill, 1a …… Horizontal roll 1b …… Vertical roll, 2 …… Inlet guide 2a …… Hourglass roller, 2b …… Guide body 3 …… Edger rolling mill, 3a, 3c …… Hourglass roller 3b ...... through guide 4 ...... edger mill 4a ...... cylinder with rolls h ...... rolling stock, h _a ...... flange tip t ...... web thickness, l ...... flange thickness r ...... flange width, H ... … Web height p… Rolling pass line, c… Step

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tsuneo Seto Tsuneo Seto 1-chome, Mizushima Kawasaki-dori, Mizushima Steel Works, Kurashiki City, Okayama Prefecture (56) References: Mizushima Works, Kawasaki Steel Co., Ltd. (56) ) JP-A-63-68204 (JP, A)

Claims (2)

[Claims] 1. A rolling mill for a shaped steel comprising a universal rolling mill and an edger rolling mill, wherein a drum-shaped movable up and down which rolls in contact with the tip of a flange of a rolling material on the entrance side of the universal rolling mill. An inlet guide consisting of a combination of a roller and a guide body that vertically shifts the web of the rolled material vertically and horizontally can be installed, and an upper and lower roller that rolls in contact with the tip of the flange of the rolled material on the exit side. Equipped with a drum-shaped roller that can be moved up and down and a detachable edger rolling machine is installed in the housing of the universal rolling machine, and the web of the rolling material and the inner surface of the flange are provided on the exit side of the edger rolling machine installed in the universal rolling machine. An apparatus for rolling a shaped steel, characterized in that an edger rolling machine equipped with a roll having a cylinder having a roll cylinder that comes into contact with each other is closely arranged. 2. An edger rolling machine, which is installed in a universal rolling machine and is arranged close to the exit side of the edger rolling machine, is provided with rolling rolls of at least two different roll shapes on the same rotating shaft, and the housing of the edger rolling machine. The rolling apparatus according to claim 1, further comprising a shift means for moving it in a direction intersecting the rolling pass line in a horizontal plane.