JPH03248702A - Rolling device for shape steel - Google Patents

Abstract

PURPOSE:To obtain the shapes of high dimensional accuracy by drawing down the width of flange with an edger mill and further correcting the drawing-down of the width of flange and the deviation of web center with the edger mill after correcting the deviation of web center with a guide on the inlet side and universal mill. CONSTITUTION:On the inlet side of the universal mill 1 of the rolling device for shapes which is provided with the universal mill 1 and edger mills 3, 4, the inlet guide 2 where vertically movable hourglass rollers 2a which are revolved while being brought into contact with the tip (ha) of a flange of a rolled stock (h) and the main body 2b of the guide with which the web W of the rolled stock (h) is held on the upper and lower sides and which is vertically and horizontally shiftable are combined is provided. Next, vertically movable hourglass rollers 3a which are revolved while being brought into contact with the tip (ha) of the flange of the rolled stock (h) and also the edger mill 3 which is freely attachable and detachable to the housing of the universal mill are provided on that outlet side. Then, the edger mill 4 with the rolls 4a with a barrel which is brought into contact with the web W and the inner surfaces of the flange (f) is provided on the outlet side.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to an apparatus suitable for rolling a section steel having a web and a flange, especially an H section steel, and relates to an apparatus suitable for rolling the H section steel. This is an attempt to reduce as much as possible the web-centric bias that has been difficult to avoid.

(Prior Art) Steel products such as H-beams are generally rolled using rolling equipment consisting of a combination of a breakdown mill, a rough universal mill, an edger mill, and a finishing universal mill, but in recent years, steel products such as H-beams have been manufactured by hot rolling. The dimensions of H-beams are becoming extremely large, and the specifications required for structures to which these H-beams are applied are becoming stricter, so the dimensional accuracy of H-beams themselves must be high. has become required. Especially in the case of H-beams, when connecting multiple H-beams continuously by bolts or welding, if the center of the flange width does not match the center of the web thickness (deviation in the web center), the H-beam A difference in level may occur at the joint of the structure, which may cause problems with the functionality or appearance of the structure.

Documents related to this point include, for example, Japanese Patent Application Laid-Open No. 1983-815.
Although the technology disclosed in this document is effective in improving the dimensional accuracy of the section steel, since the size of the section steel is fixed, it is difficult to change the size of the section steel to be rolled. It was necessary to reassemble the rolls and replace the guides every time, resulting in a significant drop in productivity.

(Problems to be Solved by the Invention) This invention can reduce the frequency of roll rearrangement and guide replacement as much as possible even if the size of the steel section to be rolled is changed in the rolling of a section steel. In particular, the purpose is to propose a rolling device that can minimize the deviation of the center of the web.

(Means for Solving the Problems) The present invention provides a rolling apparatus for a section steel equipped with a universal rolling mill and an edge rolling mill, in which rolling material is rolled in contact with the flange tip of the rolled material on the entry side of the universal rolling mill. An entrance guide is installed, which is a combination of an hourglass-shaped roller that can be moved up and down and a guide body that can sandwich the web of the rolled material vertically and shiftable up and down and left and right, and on the exit side, the flange of the rolled material is installed. It is equipped with an hourglass-shaped roller that rolls in contact with the tip and is movable up and down, and a removable edge rolling mill is installed in the housing of the universal rolling mill,
Rolling of a section steel characterized in that an Edger rolling mill equipped with a shelled roll having a roll body that contacts the web of the rolled material and the inner surface of the flange is arranged close to the exit side of the Edger rolling mill installed in the universal rolling mill. It is a device.

Here, the edge rolling mill disposed close to the exit side of the edge rolling mill installed in the universal rolling mill has at least two types of rolling rolls with different roll shapes on the same rotating shaft,
The housing of the edger rolling mill is provided with a shift means for moving the edger in a horizontal plane in a direction intersecting the rolling pass line.

Now, FIGS. 1(a) to 1(d) show an example of a rolling apparatus according to the present invention. The entrance guide 2 is an entry side guide disposed at the end of the flange of the rolled material, and the entrance guide 2 moves the web W of the rolled material up and down with an hourglass-shaped roller 2a that is movable up and down and rolls in contact with the flange tip of the rolled material. It consists of a guide body 2b which can be shifted vertically and horizontally by being sandwiched between the guide body 2b. Here, in this invention, an example is shown in which the drum-shaped roller 2a is installed on the entry side guide 2 so as to be able to deal with rolled blanks of different sizes, but only the portion corresponding to the flange f of the rolled blank is exposed to light. Any roller may be used as long as it has a tapered spread. Further, reference numeral 3 denotes an edge rolling machine which is detachably installed in the housing of the rolling mill on the exit side of the universal rolling mill 1. A drum-shaped roller 3a that can be moved up and down and a universal rolling mill 1
A penetration guide 3b is provided to guide and guide the material passing through. Here, the penetration guide 3b may be provided with a roller 3c having the same shape as the hourglass-shaped roller 3a. Further, reference numeral 4 denotes an edge rolling mill placed close to the exit side of the edge rolling mill 3 installed in the universal rolling mill 1. This edge rolling mill 4 has a role similar to a pinch roll for pulling out the rolled material 1, It includes a roll 4a having a roll cylinder that contacts the inner surfaces of the web W and the flange f, and a plate-shaped guide 4b. In addition to the above-mentioned shelled roll 4a, the edge rolling mill 4 can also have other rolls of different shapes, such as flat rolls, disposed on the same rotating shaft as shown in FIG. 2. In this case, the housing of the rolling mill The rolling mill is equipped with a shifting means for moving the roll in a horizontal plane in a direction intersecting the rolling pass line, so that the roll is shifted together with the housing depending on the shape of the rolling material. Here, a hydraulic cylinder or the like is advantageously suitable as the above-mentioned shifting means.

(Function) In rolling H-beam steel, web thickness (1) and flange thickness (
S), flange width (r) or web height (H),
It is important to roll to a predetermined size, and in this regard, conventional methods have also been able to obtain relatively satisfactory shaped steel products. That is, as shown in Fig. 3(a), each dimension from the web surface to the flange tip is 1t.
, I2.13.14, it is difficult to make all of them uniform. Therefore, as shown in Figure 3 (b), the step C that occurs when multiple H-beams are connected continuously by welding or bolting is Its occurrence was unavoidable.

When the rolled material is passed through the rolling apparatus configured as described above, the present invention first corrects the deviation of the center of the web between the entrance guide 2 and the universal rolling mill 1, and then passes the rolled material through the edge rolling mill 3. Since the flange width is reduced and the edge rolling mill 4 is used to correct the reduction of the flange width and the deviation of the web center, it is particularly effective when rolling large steel sections with a flange width exceeding 300 mm. The deviation of the center of the web, which was large in In other words, the direction may be changed to Edger rolling mill 4→Edgeer rolling mill→Universal rolling mill 1, and by repeating this several times alternately, the dimensional accuracy can be further improved.

In addition, when the Edger rolling mill 3 is not driven,
If the amount of reduction of the rolled material is large, there is a risk that the material will become stuck after passing through the universal rolling mill 1, but in this invention, the rolled material is placed close to the exit side of the edge rolling mill installed in the universal rolling mill 1. Etsujia rolling mill 4 installed
Since the roll installed in , also serves as a pinch roll, there is no such joy at all. Also, this Etsujia rolling machine 4
H
It is possible to roll different types of products, such as not only shaped steel but also thick plates, allowing for common use of equipment.

(Effects of the Invention) Thus, according to the present invention, a shaped steel product with high dimensional accuracy can be obtained. Moreover, since rolling equipment can be shared even when rolling sections of different sizes or different types of steel materials, the costs involved can be reduced as much as possible.

[Brief explanation of drawings]

Figures 1 (a) to (d) and Figure 2 are explanatory diagrams of the configuration of the rolling mill according to the present invention, and Figures 3 (a) and (b) show the cross section of the H-section steel and the state of connection of the H-section steel. It is a diagram. 1...Universal rolling mill 1a...Horizontal roll 1
b... Vertical roll 2... Entry side guide 2a...
Hourglass-shaped roller 2b... Guide body 3... Edger rolling machine 3a, 3c... Hourglass-shaped roller 3b... Penetration guide 4a... Roll with barrel h... Rolling material t... Web thickness r...Flange width p...Rolling pass line

Claims (1)

[Scope of Claims] 1. In a section steel rolling machine equipped with a universal rolling mill and an edger rolling mill, on the entry side of the universal rolling mill, there is a vertically movable device that rolls in contact with the tip of the flange of the rolled material. A drum-shaped roller and the web of the rolled material are sandwiched between the upper and lower sides.
An entry side guide is installed in combination with a guide body that can be shifted left and right, and an hourglass-shaped roller that rolls in contact with the tip of the flange of the rolled material and is movable up and down is installed on the exit side. A removable edger rolling mill was installed in the housing of the rolling mill, and a barreled roll having a roll barrel that contacted the web of the rolled material and the inner surface of the flange was installed on the exit side of the edger rolling mill installed in the universal rolling mill. A rolling device for shaped steel, characterized in that edger rolling mills are arranged in close proximity. 2. The edger rolling mill, which is installed in the universal rolling mill and is located close to the exit side of the edger rolling mill, is equipped with at least two types of rolling rolls having different roll shapes on the same rotating shaft, and these are installed in the housing of the edger rolling mill. The rolling apparatus according to claim 1, further comprising a shift means for moving in a direction intersecting the rolling pass line in a horizontal plane.