JPS6254517A - Web guide device for h shape steel - Google Patents

Abstract

PURPOSE:To increase the dimensional accuracy of a finished product and to increase the work efficiency so as to enable the change of a web guide width optionally and with high accuracy by bearing a pair of guide arms with a holding arm freely rotatably and by enabling the adjustment of the intervals between the guide arm end parts. CONSTITUTION:Each guide arm 8a, 8b is supported freely rotatably by each rotary pin 5a, 5b and the inner face of the flange of the stock to be rolled is guided by the one end of each guide arm 8a, 8b. The screw shaft 6 for changing the guide width is interposed between the other ends of both guide arms 8a, 8b. The screw 6a, 6b reversely facing each other is provided on the screw shaft 6, the arm 8a, 8b is rotated centering around the pin 5a, 5b by the rotation of the shaft 6 and the intervals at one end of the arm 8a, 8b are adjusted.

Description

[Detailed description of the invention] <Object of the invention> Industrial field of application The present invention relates to a web guide device for H-section steel, and in detail,
The present invention relates to a web guide device that is installed in the immediate vicinity of a rolling mill having rolling rollers whose rolling width can be arbitrarily changed and that can smoothly guide a material to be rolled.

Conventional technology Generally, a universal rolling mill consisting of a pair of vertical rollers that rolls down the outer surface of the flange and a pair of horizontal rollers that rolls down the web and the inner surface of the flange is used to roll H-section steel. has been done.

The front and rear ends 30a of the rolled material 30 are shown in FIGS. 2(a) and (
As shown in b), the shape tends to become tapered as the number of baths increases, and sometimes, as shown in FIG. Otherwise, deformation such as downward warpage is likely to occur.For this reason, as shown in FIGS. The material to be rolled 30 is guided until just before the horizontal rolls 22 and vertical rolls 23 are bitten, and the center of the horizontal roll 22 and the center of the material to be rolled 30 are positioned, the thickness of the flange 31 is uneven, and the material to be rolled 30 is leveled. This is intended to prevent the roll 22 from getting stuck.

On the other hand, recently, a universal rolling mill with a configuration in which the rolling width of horizontal rolls can be changed as desired, that is, a variable width roll, has been proposed and implemented. It is possible to roll 11 sections of steel with different web heights. The present inventors have also developed a variable width roll 70 as shown in FIG. 4 and have put it into practical use.

However, even with variable width rolling rolls, rolling As in the case of universal rolling mills with horizontal rolls whose width cannot be changed, a web guide 60 for guiding the material must be provided in the immediate vicinity of the variable width roll 70. In short, in order to take advantage of the characteristics of the variable width rolling roll 70, there is a strong desire to develop a web guide that can arbitrarily and precisely change the guide width online in the same way as a web guide.

Problems to be Solved by the Invention The present invention aims to solve the above-mentioned drawbacks, and specifically proposes a web guide device in which the width of the web guide can be freely adjusted online in the same way as a variable width roll of a rolling mill.

<Structure of the Invention> Means for solving the problem, that is, the present invention provides a pair of guide arms that are provided in the immediate vicinity of the variable width roll of a rolling mill and guide the rolled material.
The guide arm is rotatably supported by a holding arm supported between rolling mill stands, and the ends of these guide arms are configured to move toward or away from each other so that the distance between the ends can be adjusted. Features.

The configuration of this means will be explained in more detail with reference to the drawings as follows.

First, FIG. 1(a) is a front view of a guide device according to one embodiment of the present invention, and FIG. 1(b) is a sectional view taken along the line AA in FIG. 1(a). Figure 1 (al and (b)
), reference numeral 1 generally indicates a guide device according to one embodiment of the present invention, and this guide device 1 includes a pair of bearings 2 that are fixedly attached to a rolling mill stand 21, and a pair of bearings 2 that are connected to both ends by these bearings 2. a pair of pin insertion holes 4a, 4b formed approximately in the center of this guide holding arm 3, and each of these pin insertion holes 4a, 4.
Rotating pins 5a, 5b are rotatably attached to b, and each guide arm 8a, 8b is rotatably supported by each of these rotating pins 5a, 5b. In addition to guiding the inner surface 31a (see FIG. 5) of the flange 31 of the material 30, a guide width changing screw shaft 6 is interposed between the other ends of both guide arms 8a and 8b. ,
The blocks 7 are attached to the opposite surface of 8b, and these blocks 7
Screw the screw shaft 6 into the . Further, the screw shaft 6 is connected to a rotational drive source 9 via a universal joint 12 and a floating shaft 13, and a guide holding arm 3 is also connected to the screw shaft 6 to adjust the vertical height of each guide arm 8a, 8b. Adjustable pole that can be raised and lowered [・10
Support through. As shown in FIG. 1(a), the screw shaft 6 is machined with screws 6a and 6b facing in opposite directions, and the rotation of the screw shaft 6 causes each guide arm 8a,
8b rotates around pins 5a and 5b, so that the distance between one ends of guide arms 8a and 8b can be adjusted.

Each block 7, into which both ends of the screw shaft 6 are screwed, has a block shaft support hole 11a at the other end of each guide arm 8a, 8b.
, 11b are provided, and the shaft center of the block 7 is vertically and rotatably supported by these shaft support holes. The rotational drive a9 is fixed to a rolling mill stand (not shown), and this drive source 9 is connected to the screw shaft G via a floating shaft 13 having a universal joint 12 at both ends, and when the guide arms 8a and 8b rotate. Configure to adapt to fluctuations. In addition, instead of being fixed to the rolling mill stand, the rotational drive source is mounted on the guide holding arm 3, and the rotational drive source is mounted on the screw shaft 6.
It can also be connected directly to the end of the

However, in order to keep the rotary drive source 9 away from the position where the rolled material 30 passes and protect the rotational drive source 9 from radiant heat, water droplets, dust, etc., it is desirable to arrange it as described above.

The guide device configured as described above supports the rolled material 30 from the back surface of the web 32, and one end of each guide arm 8a, 8b guides the inner surfaces of both flanges 31. Therefore, when the front and rear ends of the material to be rolled 30 are upside down, as shown in FIG. 1(b), the upper guide 40.4
1 are provided, and the material to be rolled 30 is guided by these. However, the upper guides 40 and 41 of the rolled material 3
There is no need to change the width according to the variation in the rolling mill 50.
It is sufficient to use a fixed type conventional guide whose guide width is slightly narrower than the minimum web width to be rolled.

Next, the operation of the guide device having the above configuration will be explained with reference to FIG. 5 as follows.

In other words, in Fig. 5, the finished product dimensions are flange height 2o.
FIG. 2 is a plan view showing a situation during rolling of a material to be rolled 30 having a web height of 500 m, a web thickness of 10 mm, and a flange thickness of 16 mm. At this time, the inner width Jw of both flanges 31 is 460 mm, and the flange 31
The thickness tF is 20 mm. Before the tip of the material to be rolled 30 is bitten by the horizontal roll 70 and the vertical roll 23, in the guide device 1 on the entry side of the rolling machine, the rotation drive R
9, the guide arms 8a and 8b are rotated so that the guide width 19 becomes smaller than the inner width lW of the flange 31,
For example, 19 is adjusted to 459 mm.

On the other hand, a guide device 1' having the same structure is provided on the exit side of the rolling mill,
The width 19 of this guide device 1' is the width of the rolled material 3 after rolling.
The flange internal width 1vt2 of 0, that is, the amount of width expansion due to rolling, is set to be smaller than the value added to the flange internal width lW. j!w2-1*, )
is 4 mm.

Therefore, the material 30 to be rolled, whose tip has a horizontal bevel, is placed on the guide arm 8a of the guide device @1 on the entry side of the rolling machine.
, 8b in the direction of the arrow from the rear end to the front end. The width of the rear ends of guide arms 8a and 8b is the width of the tip (19=
It is narrower than 459 mN, so that even if the rolled material 30 deformed in this way comes, it can pass through smoothly. The inner surface contacts the guide arm 8a, and the rolled material 30 and the horizontal roll 7
The widthwise center of 0 can be positioned with an accuracy of 0.5 cylinder deviation.

Similarly, on the exit side of the vertical rolls 23, 23, the guide arm 8a' of the guide device 1' on the exit side,
8b' Guided by the tip, and at the same time in the horizontal direction,
The inner surface of the flange 31 is connected to the guide arms 8a' and 8b'.
It is guided by guide portions (width 19-=463 mm) on both sides, allowing the rolled material 30 to pass smoothly.

In reality, since the horizontal movement of both sides of the flange 31 is restricted by the vertical rolls 23 of the rolling mill during rolling, the deviation between the center of the rolled material 30 and the center of the horizontal roll 70 is less than 0.5 mm. , about 0.1 to 0.2 mm, and the thickness of the flange 31 can be maintained with extremely high precision.

<Effects of the Invention> As explained in detail above, the present invention is comprised of a pair of guide arms that are rotatably supported approximately in the center thereof, and that the pair of guide arms are rotated around this support portion. Therefore, if this web guide device is installed close to a universal rolling mill for 11-section steel, etc., the web guide width can be changed arbitrarily and with high precision even in rolling operations where the inner width of the rolled material to be guided changes frequently. In addition, this guide width change can be carried out online, which not only improves the dimensional accuracy of the finished product but also significantly improves the efficiency of the rolling operation.

In addition, if the ends of a pair of guide arms are configured to approach or separate from each other, but if the ends are configured as a screw mechanism, when the guide arms and the material come into contact, the external force generated in the drive part of the width adjustment mechanism can be reduced. It can be kept small, has a long equipment life, and has an extremely simple structure, making maintenance and inspection easy, and it has excellent work performance.

[Brief explanation of the drawing]

FIG. 1(a) is a plan view of a web guide device according to one embodiment of the present invention, and FIG. 1(b) is an A-A in FIG. 1(a).
2 (a) and (b) are explanatory diagrams of the shape of each material to be rolled. Figures 3 (a) and (b) are a plan view and a cross section of a conventional web guide device. 4 is an explanatory diagram showing a part of the variable width roll in cross section, and FIG. 5 is a plan view when a rolled material is guided by a web guide device according to an embodiment of the present invention. Code 2...Bearing 5a, 5b...
... Bin 6 ... Screw shafts 8a, 8b ... Guide arm 21 ...
・Rolling mill stand 23... Vertical roll 30... Rolled material 70... Horizontal roll

Claims (1)

[Claims] A pair of guide arms that are installed in the vicinity of the variable width rolls of the rolling mill and guide the material to be rolled are rotatably supported by holding arms that are supported between the rolling mill stands, and furthermore, the ends of these guide arms are A web guide device for an H-section steel, characterized in that the web guide device is configured to move closer to or apart from each other so that the distance between the end portions can be adjusted.