JPH069704B2 - H-section steel web guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Purpose of the Invention> Field of Industrial Application The present invention relates to a web guide device for H-section steel, and more specifically,
Width change that can change rolling width arbitrarily It is provided in the immediate vicinity of the horizontal roll, and the center position of the pair of guide arms can be always matched with the position where the rolled material should be bitten.
The present invention relates to a web guide device that can sufficiently withstand an impact load in a traveling direction due to a material to be rolled and that can smoothly guide the material to be rolled.

2. Description of the Related Art Generally, a universal rolling machine is used for rolling H-section steel, which is composed of a pair of vertical rollers for rolling down the outer surface of the flange and a pair of horizontal rollers for rolling down the web and the inner surface of the flange. .

The leading and trailing ends 30a of the material 30 to be rolled tend to be tapered as the number of passes increases as shown in FIGS. 2 (a) and 2 (b), and sometimes, as shown in FIG. At the end 30a, horizontal deformation called vertical bending and vertical deformation such as upward warp or downward warp occur. Therefore, as shown in FIGS. 3 (a) and 3 (b), material guides called web guides 60, 40 and 41 are provided in the immediate vicinity of the horizontal roll 22 and the vertical roll 23, and the horizontal guides are provided by the material guides. The material to be rolled 30 is guided until just before the roll 22 and the vertical roll 23 are bitten, and the center of the horizontal roll 22 and the material to be rolled 30 are guided.
Of the flange 31 of the material 30 to be rolled and the horizontal roll 22 of the material 30 to be rolled
It is designed to prevent rushing into the ground. Reference numeral 61 is a guide roll, and 32 is a web of the material 30 to be rolled.

On the other hand, recently, in a universal rolling mill, there has been proposed and implemented a horizontal roll whose width can be changed so that the rolling width of the horizontal roll can be changed as desired. With this horizontal roll whose rolling width can be changed, H-section steels having different web heights can be rolled.

From this point, the present inventors have also developed and put into practical use a horizontal roll 70 whose width can be changed as shown in FIG. In FIG. 4, reference numeral 23 indicates a vertical roll, and the rolling width of the horizontal roll 70 can be changed by a hydraulic device connected thereto.

However, even if it is possible to change the width in this way, as in the case of a horizontal rolling universal mill in which the rolling width cannot be changed, the deviation of the flange thickness due to the defective shape of the material to be rolled and the sputum to be rolled, In order to prevent the rolled material from hitting the horizontal roll, a material guide device such as a web guide should be provided in the immediate vicinity of the variable width horizontal roll 70. In short, in order to take advantage of the characteristics of the horizontal roll having a variable width, it is strongly desired to develop a web guide device which can change the guide width with high accuracy online.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention aims to solve the above-mentioned drawbacks, and specifically, like a variable width horizontal roll whose rolling width can be adjusted online, the web guide width can be freely adjusted online. We propose a web guide device with a structure that can be bited into a variable width horizontal roll by positioning it at a predetermined position where the material to be rolled should always be bitten, and that can withstand the impact load of the material to be rolled.

<Structure of the Invention> Means for Solving the Problems That is, the web guide apparatus according to the present invention comprises a pair of guide arms which are provided in the immediate vicinity of the variable width horizontal rolls of the rolling mill and which guide the material to be rolled. In the shaped steel web guide device, the substantially central portions of these guide arms are rotatably supported, while the pair of guide arms are provided close to the variable width horizontal rolls between the other ends on the side away from the variable width horizontal rolls. A screw shaft for adjusting the distance between the ends is provided, and the screw shaft is connected to a drive source fixed to the rolling stand via a universal joint.

Therefore, the structure of this means will be described in more detail with reference to the drawings.

1a is a plan view of a guide device according to one embodiment of the present invention, and FIG. 1b is a sectional view taken along the line AA of FIG. 1a.

First, in FIGS. 1a and 1b, reference numeral 1 generally indicates a guide device according to an embodiment of the present invention. The guide device 1 includes a pair of bearings 2 mounted and fixed to a rolling mill stand 21, guide holding arms 3 whose both ends are supported by the bearings 2, and a pair of guide holding arms 3 formed substantially at the center of the guide holding arms 3. Are provided with the pin insertion holes 4a and 4b, and the rotation pins 5a and 5b rotatably attached to the respective pin insertion holes 4a and 4b.

The guide arms 8 are formed by the rotary pins 5a and 5b.
The a and 8b are rotatably supported at substantially the center thereof. The inner surface 31a (see FIG. 5) of the flange 31 of the material 30 to be rolled is guided by one end of each guide arm 8a, 8b, and further the other end of both guide arms 8a, 8b, that is, the width changing horizontal roll 70 A screw shaft 6 for changing the guide width is interposed between the other ends on the separated side.

That is, the blocks 7 are mounted on the facing surfaces of the pair of guide arms 8a and 8b that face each other, and the screw shaft 6 is screwed onto these blocks 7, and the screw shaft 6 is mounted on the screw shaft 6 as shown in FIG. 1 (a). , And screws 6a and 6b that are opposite to each other are formed.

The screw shaft 6 is connected to a rotary drive source 9 via a universal joint 12 and a floating shaft 13. Furthermore, in order to adjust the vertical height of each of the guide arms 8a and 8b, the guide holding arm 3 is supported via an adjusting bolt 10, and the height of the arm 3 can be freely adjusted.

As described above, the screw shaft 6 is provided with the reverse screws 6a and 6b.
Is formed, and the pair of guide arms 8a, 8b are supported by the rotating pins 5a, 5b at substantially the center, the rotation of the screw shaft 6 causes the guide arms 8a, 8b to rotate about the rotating pins 5a, 5b. It is possible to adjust the distance between the ends of the guide arms 8a and 8b that rotate and guide the material to be rolled 30, that is, the distance between the ends on the side closer to the width changing horizontal roll 70. That is, in the guide arms 8a and 8b, the position of the material to be rolled can be adjusted by one end, that is, the center position of one end of the guide arms 8a and 8b can be adjusted so as to match the position where the material to be rolled of the rolling roll should be engaged. Therefore, this position adjustment is extremely easy, and remote automatic adjustment is also possible. Further, with the structure in which the guide arms 8a and 8b are supported by the rotating pins 5a and 5b at substantially the center thereof and the screw shaft 6 at the other end is adjusted, it is possible to sufficiently withstand a shocking traveling direction load during rolling. You can get strength.

In both blocks 7 into which both screw shafts 6 are screwed, block shaft support holes 11a and 11b are provided at one end of each guide arm 8a and 8b.
The axis of the block 7 is vertically and rotatably supported by 1b.

Further, in order to remotely and automatically achieve the adjustment of one end of the guide arms 8a and 8b, the rotary drive source 9 is fixed to a rolling mill stand (not shown), and the drive source 9 is provided at both ends. It is connected to the screw shaft 6 via a floating shaft 13 having a universal joint 12 so that it can adapt to fluctuations when the guide arms 8a and 8b rotate. Further, instead of being fixed to the rolling mill stand, the rotary drive source can be loaded on the guide holding arm 3 and directly connected to the end of the screw shaft 6. However, the rotary drive source 9 is moved away from the position where the material 30 to be rolled passes and the radiant heat and water droplets
For protection from dust and the like, it is desirable to arrange as described above.

The guide device according to the present invention configured as described above supports the material 30 to be rolled from the back surface of the web 32 by the guide arms 8a and 8b.
One ends of a and 8b guide the inner surfaces of both flanges 31. Therefore, when the front and rear ends of the material 30 to be rolled are warped, as shown in FIG.
0 and 41 are provided, and the rolled material 30 is guided by the guide arms 8a and 8b together with the upper guides 40 and 41.

These upper guides 40 and 41 do not have to change their widths according to the variation of the width of the material 30 to be rolled, and may be of a fixed type whose guide width is slightly narrower than the minimum web width rolled by the rolling mill 50.

Next, the guide device having the above-mentioned structure will be further described with reference to the embodiment shown in FIG.

First, in Fig. 5, the finished product dimensions are flange height 200
mm, a web height of 500 mm, a web thickness of 10 mm, and a flange thickness of 16 mm. At this time, the inner width (lW ₁ ) between both flanges 31 of the rolled material 30 is 460 mm, and the thickness (t _F ) of the flange 31 is 20 mm. Before the tip of the material 30 to be rolled is caught in the horizontal roll (not shown in FIG. 5) and the vertical roll 23, in the guide device 1 according to the present invention, the rotary drive source 9 ( According to FIG. 1 (a), the guide arms 8a and 8b are rotated so that the guide width l ₉ is smaller than the inner width lW _{1 of the} flange 31, and for example, l _g is adjusted to 459 mm.

On the other hand, a guide device 1'according to the present invention having the same structure is also provided on the outlet side of the rolling mill, and the width l _g 'of the guide device 1'is the flange inner width lW ₂ of the rolled material 30 after rolling, that is, The amount of width expansion by rolling is set to a value smaller than the value obtained by adding the flange inner width lW ₁ , and here, l ′ _g1 is 463 m.
m, and the amount of width expansion by rolling (lW ₂ −
1W ₁ ) is 4 mm.

Therefore, the rolled material 30 having a nose bend in the horizontal direction at the tip is guided to the guide arm 8 of the guide device 1 on the rolling mill entrance side.
The a and 8b are moved in the arrow direction from the other end to one end, that is, from the rear end toward the front end. The widths of the other ends of the guide arms 8a and 8b, that is, the rear ends, are the minimum inner width (l _g
= 459 mm), the rolled material 30 thus deformed can be passed smoothly.
The guide width by the pair of guide arms 8a, 8b increases from the other end toward one end, and becomes maximum in the immediate vicinity of the rolling mill including the vertical roll 23 and the width changing horizontal roll 70, where the inner surface 31a of the flange 31 is guided by the guide arm. By contacting 8a and 8b, the widthwise center of the material 30 to be rolled and the widthwise center of the width-changing horizontal roll 70 can be positioned with an accuracy of a deviation of 0.5 mm.

Similarly, on the exit side of the vertical rolls 23, 23, the guide arm 8a 'of the guide device 1'on the exit side is also provided so that the unsteady part of the web 32 at the tip of the material to be rolled 30 does not project downward.
Guided at the tip of 8b '. At this time, with respect to the horizontal direction, the flange inner surface 31a is attached to the guide arms 8a 'and 8b'.
It is guided by the guide portions (width l _g ′ = 463 mm) on both sides, and the rolled material 30 can be passed smoothly.

Actually, since the horizontal movement of both side surfaces of the flange 31 is restricted by the vertical rolls 23 of the rolling mill, the deviation between the center of the material 30 to be rolled and the center position of the width-changing horizontal roll 70 is 0.5 mm. Smaller than 0.1-0.2m
Since it is about m, the thickness of the flange 31 can be maintained with extremely high accuracy.

<Effects of the Invention> As described in detail above, the web guide apparatus according to the present invention rotatably supports the substantially central portions of the pair of guide arms, while one end of the pair of guide arms is provided between the other ends. It is provided with a screw shaft for adjusting the interval between them. Even in rolling operations where the inner width of the rolled material to be guided changes frequently, the web guide width can be changed arbitrarily and with high accuracy, and this change of the guide width can be carried out online. It is possible to bite the material to be rolled with its center aligned with the center of the width change horizontal roll.

Further, the pair of guide arms are rotatably supported at substantially the center, and the screw shaft of the screw mechanism is interposed between the other ends of the guide arms into which the material to be rolled is inserted, and the one or more guide arms guide the material to be rolled. Therefore, the gap between the other ends of the guide arms can be reduced, and the material to be rolled can be smoothly introduced and guided. Further, even when it comes into contact with the material to be rolled, the external force generated in the width adjusting mechanism can be suppressed to be small.

Further, since the adjustment is performed by the screw shaft, if this is connected to the drive source of the rolling stand through the universal joint, it can be easily operated remotely.

[Brief description of drawings]

FIG. 1 (a) is a plan view of a web guide apparatus according to one embodiment of the present invention, and FIG. 1 (b) is AA of FIG. 1 (a).
2A and 2B are explanatory views of the H shape of each rolled material, and FIGS. 3A and 3B are a plan view and a cross section of a conventional web guide device. 4 and 5 are explanatory views showing a part of the variable width roll in cross section, and FIG. 5 is a plan view when guiding a material to be rolled by a web guide device according to one embodiment of the present invention. Reference numeral 2 ... Bearing, 5a, 5b ... Rotating pin 6 ... Screw shafts 8a, 8b ... Guide arm 21 ... Rolling mill stand 23 ... Vertical roll 30 ... Rolled material 70 ... Width changing horizontal roll

Claims (1)

[Claims] 1. A H-shaped steel web guide apparatus provided with a pair of guide arms for guiding a material to be rolled, which is provided in the vicinity of a variable width horizontal roll of a rolling mill, and rotates substantially the central portion of these guide arms. While freely supporting, a screw shaft is provided between the other ends of the pair of guide arms on the side distant from the variable width horizontal rolls, and a screw shaft for adjusting the interval of one end close to the variable width horizontal rolls is provided. Is connected to a drive source fixed to a rolling stand via a universal joint, and is a web guide device for H-section steel.