JP2726215B2 - Universal rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjusting apparatus for a universal rolling mill, and more particularly to a universal rolling mill having a pair of horizontal rolls and a pair of vertical rolls. The present invention relates to a height adjusting device for a universal rolling mill that can be arbitrarily changed in a rolling line.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture an H-section steel by hot rolling from a bloom or a beam blank mainly manufactured by continuous casting, it is necessary to efficiently set a target material to a desired size,
In order to finish the shape, generally, as shown in FIGS. 5 (1) and (2), a breakdown rolling mill 11, a coarse universal rolling mill group 14 composed of a combination of a coarse universal rolling mill 12, and an edger rolling mill 13, and A dedicated manufacturing facility is used in combination with the finishing universal rolling mill 15 disposed downstream of the rolling mill.

[0003] In this manufacturing facility, materials to be rolled such as a slab 1 shown in FIG. 6A, a bloom 2 shown in FIG. 6B and a beam blank 3 shown in FIG. Breakdown rolling mill 1 having a plurality of dies 4 as shown
The rolls are sequentially passed through one roll, and processed to a shape suitable for intermediate rolling performed in a later step. Next, as shown in FIG. 8A, one or more coarse universal rolling mills 12 having a substantially H-shape are formed by a horizontal roll and a vertical roll, and As shown in FIG. 8 (3), as shown in FIG. 8 (3), as shown in FIG. 8 (3), one or more edger rolling mills 13 having upper and lower horizontal rolls each having a substantially H-shaped shape perform one or more passes. Finishing universal rolling mill 1 with H-shape by horizontal roll and vertical roll
In 5, the steel sheet is rolled into an H-shaped steel product having a desired size in one pass.

As shown in FIG. 9, a universal rolling mill used in rough rolling and finish rolling used in the rolling of an H-section steel has a pair of horizontal rolls 4 vertically sandwiching a material to be rolled.
1 and 42, and a pair of vertical rolls 45 and 46 sandwiching the material to be rolled left and right. Then, as shown in FIGS. 10 and 11, the center of the width of the flange 18f of the H-section steel 18 matches the roll center of the vertical rolls 45 and 46, and the center of the width of the vertical rolls 45 and 46 before and after the universal rolling mill. The vertical distance to the roller surface of the roller table 19 placed on the roller is the width B of the flange 18f.
Approximately equal to 1/2 of Therefore, even if the height Wi of the web 18w of the H-section steel 18 is the same, the flange 1
8f width B changes (for example, web height = 700m
m, flange width = 300 mm, web height = 700 mm, flange width = 250 mm) and H-beam 1
Since the center of the width B of the flange 18f of 8 and the center of the vertical rolls 45 and 46 are displaced, it is necessary to temporarily remove the universal rolling mill from the line and adjust the upper and lower levels of the vertical rolls 45 and 46 in the roll shop. . Therefore, in this case, it is necessary to adjust the level by replacing the universal rolling mill whose height has been adjusted in advance, or by replacing the liner plate on the lower surface of the housing. Therefore, there is a problem that productivity must be greatly reduced.

[0005] In order to solve such a problem, there is a height adjusting device for a universal rolling mill introduced in Japanese Patent Application Laid-Open No. Sho 59-174205. As shown in FIG. 14, the height adjusting device inserts a liner 86 between a projection 87 formed on a roll chock 84 of the vertical rolls 45 and 46 and a chock guide 82, and removes and inserts the liner 86 into and out of the vertical roll 45. A height adjustment device for moving 45 and 46 up and down is introduced.

[0006] However, Japanese Patent Application Laid-Open No. Sho 59-1742 discloses the above.
The height adjusting device disclosed in Japanese Patent Publication No. 05 is a so-called off-line type in which the level of the vertical roll cannot be adjusted unless the vertical roll is taken out of the housing of the rolling mill together with the roll chock. There was such a problem. In addition, there is a problem that the level can be adjusted up and down only by the thickness of the liner, so that the adjustment range is very narrow and practicality is poor.

[0007] In this regard, in regard to this point, in the newly established rolling mill, a table roller for raising and lowering the material to be rolled in accordance with a change in the flange width of the H-section steel is disposed before and after the universal rolling mill, or a universal rolling mill is provided. A lifting device is installed between the mill body and the sole plate on which the universal rolling mill is mounted and fixed, and the center of the roll according to the flange width is eliminated by this device. Measures have been taken to enable rolling of H-beams with a width.

However, in the existing equipment, if an expensive lifting mechanism is provided for the entire table roller corresponding to the as-roll length of the material to be rolled during rolling, the equipment cost will increase significantly, and the equipment cannot be easily modified. was there. In addition, the existing rolling mill has a limited space for disposing a vertical roll elevating device, and the current situation is to deal with this by partially rearranging the vertical rolls and rearranging the stands.

Therefore, in order to solve such a problem, the present applicant has previously described the universal rolling mill housing 28 and the vertical rolls 45 and 46 as shown in FIG.
And wedge-shaped slide plates 83a to 83d disposed in opposite directions to each other in upper and lower gaps formed between the roll chock 84 and the slide plates 83a to 83d.
The universal rolling mill in which the driving means 80a to 80d for moving back and forth in each gap are connected has been introduced.

[0010] Further, as shown in FIG.
A detachable mechanism for fixing and holding the housing 28 of the universal rolling mill to the sole plate 27 via the liner plate 70; an elevating mechanism for moving the housing 27 up and down together with the vertical rolls 45 and 46; The universal rolling mill provided with the spacer liner mounting mechanism 88 for taking the spacer liner 52 into and out of the gap generated therebetween has been introduced.

[0011]

However, in the conventional example shown in FIG. 12, the vertical rolls 45 and 4 are remotely operated.
6 can be moved up and down, but the machining of the housing 27 is required, and there is a problem that it is difficult to apply it to an existing universal rolling mill. Also, in the conventional example shown in FIG. 13, the vertical rolls 45 and 46 can be moved up and down by remote control, but the height is set only at the pitch of the thickness of the liner plate 70 inserted between the sole plate 27 and the lower surface of the housing 28. Cannot be adjusted, and the adjustment range is very narrow.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, and it is possible to quickly change the height adjustment of a vertical roll of a universal rolling mill in the vertical direction by remote control. In addition, an object of the present invention is to provide a universal rolling mill provided with a height adjusting device that can have a wide adjustment range and does not require machining of a housing.

[0013]

In order to achieve this object, a universal rolling mill according to the present invention comprises a height adjusting device interposed between an upper surface of a sole plate and a housing, and an inclined surface provided on a lower surface. An upper liner having an upper surface, a lower liner having an inclined surface on the upper surface and in contact with the inclined surface of the upper liner, and sliding the two liners between the inclined surfaces to form an upper surface of the upper liner and a lower surface of the lower liner. a reciprocating drive device for a distance variable, constitutes a further, the advanced
The retraction drive is remotely operable and is connected to the housing
Mounted on the side of the vehicle.

[0014]

According to the present invention, in order to raise the housing with respect to the sole plate, the height of the housing is temporarily increased to a predetermined elevation position by an elevating mechanism. Move relative to the lower liner. This relative movement can increase the total thickness of the upper liner and the lower liner if both liners are moved in the direction of ascending the inclined surface. The height in the direction can be adjusted. Here, the housing is lowered by the elevating mechanism to apply the load of the housing to the upper surface of the upper liner, and the operation of raising the housing with respect to the sole plate is completed. The lowering operation of the housing may be performed by reversing the relative movement between the two liners and reducing the total thickness of the two liners.

As described above, the vertical center of the vertical roll can be set to the center of the material to be passed in the height direction by the raising and lowering of the housing. This setting is performed by operating the lifting mechanism and the forward / backward drive device. It can be done easily.

[0016]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall front view in which a part of a universal rolling mill according to an embodiment of the present invention is omitted, and FIG.
FIGS. 3 and 4 are views showing a main part of the universal rolling mill shown in FIG.

As shown in FIGS. 1 and 2, a sole plate 27, which is a component of the present invention, is fixed on a pair of foundations 26 fixed to the ground. Has flanges 27a integrally protruding in opposite directions. On the upper surface of these flanges 27a, an upper liner 32 having a base portion 29 forming a part of the housing 28 having an inclined surface on a lower surface;
It is mounted via a lower liner 31 which has an inclined surface on the upper surface and is opposed to and contacts the inclined surface of the upper liner 32.
That is, the housing 28 is provided with the two liners 31 and 3.
2 and is mounted on the sole plate 27 via the second. More specifically, a lining plate 33 is interposed between the upper liner 32 and the base portion 29, and a lining plate 34 is interposed between the lower liner 31 and the flange 27a.

The upper liner 32 is connected to an advance / retreat member 36 connected to an advance / retreat drive device 35 composed of a cylinder device installed on the base portion 29.
2 is configured to be able to slide on the inclined surface in the direction of ascending and descending with respect to the lower liner 31. Due to this sliding, the total thickness of the upper liner 32 and the lower liner 31 changes, and the housing 28 moves up and down with respect to the sole plate 27. Thus, the liners 31 and 32, the advance / retreat drive device 35, and the advance / retreat member 36 constitute a height adjusting device 37, which is a component of the present invention.

The housing 28 includes an upper chock 3
8 and a lower chock 39 are supported so as to be able to move up and down, respectively.
And 42 are erected. In the housing 28, each chock 43 is supported on the left and right sides of the rolled material 44 so as to be movable in the width direction of the rolled material 44. The chocks 43 individually support vertical rolls 45 and 46. ing. Thus, each roll 41, 42, 45 and 46
Corresponds to a change in the rolling dimension of the material 44 to be rolled. The housing 28 itself and each roll 4
The configurations of 1, 42, 45, and 46 are well-known, and a detailed description thereof will be omitted.

The lower surface of the base portion 29 of the housing 28 forms an inclined surface in which the outer end of the base portion 29 becomes higher. Are integrally formed. A horizontal hole 48 is formed through the housing 28 between the base portion 29 and the lower flange 47. A slide block 51 whose lower part is longer than its upper part is accommodated in a slide guide 49 on the inner surface of the hole 48 so as to be able to advance and retreat toward the sole plate 27.
A spacer liner 52 having an inclined surface corresponding to the inclined surface of the lower surface of the flange 27a is fixed to the upper surface of the lower outer end of the slide block 51. When the flange 27a of the sole plate 27 is pressed from below by the spacer liner 52, the flange 27a is sandwiched between the spacer liner 52 and the base portion 29, and the housing 28 is fixed to the sole plate 27. I have.

On the back of the slide block 51, a cylinder device 54 is supported on a support member 53 fixed to the housing 28 by means not shown, and an advancing / retreating member 55 advanced and retracted by the cylinder device 54 is provided. The spacer liner 52 can be retracted from the lower surface of the flange 27 a of the sole plate 27 by driving the cylinder device 54.

A wheel 56 is rotatably mounted on the lower surface of the housing 28. Below the wheel 56, an elevating mechanism 57 fixed to the sole plate 27 is provided.
The cylinder device erected as is provided. An elevating rail 58 is mounted on the upper end of a piston rod of the cylinder device, and supports a wheel 56 from below to expand and contract the piston rod.
8 can be moved up and down.

Next, a specific operation when the H-section steel is rolled using the universal rolling mill according to the present embodiment will be described with reference to the drawings. First, as shown in FIG. 5, a rolled material 44 roughly formed by the breakdown rolling mill 11 is formed.
Is set on the roller table 19 at the coarse universal rolling mill 12.
Transported to

At this time, the rough universal rolling mill 12 sets each of the rolls 41, 4 to a height corresponding to the dimensions of the H-beam to be manufactured.
2, 45 and 46 are placed and fixed on the flange 27a of the sole plate 27 in the following manner so as to be positioned. First, the elevating mechanism 57 is operated, and the elevating mechanism 57 is operated.
The piston rod housed in the cylinder is raised to raise the elevating rail 58, and the wheel 56 of the rough universal rolling mill 12 is supported by the elevating rail 58 from below,
Further, the piston rod is raised to position the housing 28 above the upper surface of the flange 27a of the sole plate 27.

Next, in this state, the housing 28 is moved to a predetermined position on the elevating rail 58 using the wheels 56 by another traction device (drive device) not shown, and the rough universal rolling mill 12 is moved to the predetermined position. To be installed in Then
The direction in which the upper liner 32 and the lower liner 31 rise on the inclined surface by remote control so that the roll centers of the vertical rolls 45 and 46 housed in the housing 28 have a height corresponding to the dimensions of the H-beam to be manufactured. And the upper liner 3
2 and the lower liner 31 are relatively moved and fixed at a desired position. That is, by the relative movement between the upper liner 32 and the lower liner 31, the total thickness of the two liners 31 and 32 can be increased, whereby the height of the housing 28 with respect to the sole plate 27 can be set. As a result, the roll center height of the vertical rolls 45 and 46 can be easily adjusted according to the dimensions of the H-beam to be manufactured. On the other hand, the horizontal rolls 41 and 42 adjust the roll center height in the same manner as in the related art.

Next, the piston rod accommodated in the cylinder of the elevating mechanism 57 is lowered to lower the lower surface of the base portion 29 of the housing 28 to the lining plate 33, the upper liner 32, the lower liner 31, and the lining plate 34.
Is placed on the flange 27a of the sole plate 27 via the. Next, the cylinder device 54 is operated to advance the slide block 51 in a direction approaching the sole plate 27, the spacer liner 52 is inserted into the lower surface of the flange 27a, and the flange 27a is pressed from below by the spacer liner 52. In this manner, the upper surface of the flange 27a is provided by the base portion 29 via the lining plate 33, the upper liner 32, the lower liner 31, and the lining plate 34, and the lower surface of the flange 27a is provided by the lower flange 47 via the spacer liner 52. Hold and fix. Thereafter, the lifting mechanism 57 is returned to the original position.

In the rough universal rolling mill 12, FIG.
As shown in (1), the lower end of the flange 44f of the material 44 to be rolled is on the roller table 19, and the center of the flange width and the roll centers of the vertical rolls 45 and 46 of the coarse universal rolling mill 12 coincide with each other. That is, the sole plate 2
7 and the vertical rolls 45 and 46 from the upper surface of the flange 27a.
The distance H ₁ to the center of the roll of the housing 28 and the housing 28
Distance of H ₂ from the lower surface up to the roll center of the vertical rolls 45 and 46 has a constant value.

In FIG. 2, the rough universal rolling mill 1
2 is placed on the flange 27a of the sole plate 27,
The state where the distance from the lower surface of the housing 28 to the upper surface of the flange 27a of the sole plate 27 is h is shown. The rolled material 44 conveyed to the rough universal rolling mill 12 is rolled to a predetermined sectional shape. Thereafter, the rolled material 44 is moved to the edger rolling mill 13.
After passing through a finishing universal rolling mill 15, it is formed into an H-shaped steel having a predetermined dimension. At this time, the finishing universal rolling mill 15 is also provided with a height adjusting device similar to that of the coarse universal rolling mill 12, and the roll center of the vertical roll is adjusted in a similar manner to the height corresponding to the dimension of the H-shaped steel to be manufactured. Set to The center of the horizontal roll is also set at a height corresponding to the dimensions of the H-section steel manufactured by the same method as the conventional method.

Next, the web height is the same as that of the H-shaped steel.
Therefore, the H width of the H-shaped steel is increased by 2α.
Rolling of a shape steel using the same coarse universal rolling mill 12
Will be described. The coarse universal rolling mill
12, as described above, the sole plate 27
Rolls of vertical rolls 45 and 46 from the upper surface of the flange 27a
Distance to the center H₁And the lower surface of the housing 28
From the center of the vertical rolls 45 and 46 to the roll center.
Release H_TwoHas a constant value. Therefore, the H-section steel
When rolling to change the width of the flange
Is below the flange 44f of the rolled material 44 according to the changed value.
From the end to the upper surface of the flange 27a of the sole plate 27
Distance H _ThreeWill be changed. For this reason,
To continue using the versal rolling mill 12 as it is, use the H-shape.
Vertical rolls 45 and 46 are sowed according to the width of the steel flange.
The upper surface of the flange 27a of the
Need to be lowered.

Here, the horizontal rolls 41 and 42 can be freely and relatively quickly moved up and down by adjusting the rolling mechanism of the rolls, so that there is no particular problem. Compared to the previously rolled H-section steel, the flange width increased by 2α
To roll the steel, as shown in FIGS. 3 and 4, the flange 2 of the sole plate 27 is
It is necessary to increase the distance to the upper surface of 7a by α to h + α.

In this case, first, the cylinder device 54 is operated to slide the slide block 51 to the sole plate 27.
From the space between the base portion 29 of the housing 28 and the lower flange 47.
And the housing 28 is opened from the sole plate 27. Next, the elevating mechanism 57 is operated to operate the elevating rail 5.
8, the wheels 56 of the coarse universal rolling mill 12 are supported from below by the elevating rails 58, and the piston rod is further raised to move the housing 28 to the sole plate 27.
Above the upper surface of the flange 27a.

Then, in this state, the two liners 31 and 32 are moved by remote control until the total thickness of the upper liner 32 and the lower liner 31 becomes larger than the above-mentioned thickness by α. After relative movement to, fix. Thus, the housing 28 is further raised by α from the upper surface of the flange 27a of the sole plate 27, and the distance from the lower surface of the housing 28 to the upper surface of the flange 27a of the sole plate 27 is set to h + α. The horizontal rolls 41 and 42 adjust the roll center height in the same manner as in the related art.

Next, the piston rod accommodated in the cylinder of the elevating mechanism 57 is moved down to
The lower surface of the base portion 29 of the lining plate 33, the upper liner 32, the lower liner 31, and the lining plate 3
4 and placed on the flange 27a of the sole plate 27 through the base portion 29 and the lower flange 47 in the same manner as described above.
After the housing 28 is fixed to the sole plate 27 with the flange 27a interposed therebetween, the lifting mechanism 57 is returned to the original position.

As described above, the roll center height of the vertical rolls 45 and 46 can be arbitrarily adjusted by remotely operating the height adjusting device 37, so that the roll chance of the flange width of the H-section steel can be easily achieved. Became possible. For this reason, the horizontal rolls 41 and 42, the vertical roll 4
It is not necessary to change 5 and 46 or change the liner plate below the sole plate 27, so that the line stop time can be reduced and the operation rate can be greatly improved.

The edger rolling mill 13 is composed of only horizontal rolls arranged vertically, and the roll center position of the horizontal roll can be freely changed. There is no particular problem to achieve. Next, using the coarse universal rolling mill 12 provided with the height adjusting device 37 according to the present embodiment, an H-section steel having a web height of 700 mm and a flange width of 200 mm is rolled, and then the web height is increased.
When an H-section steel having a width of 700 mm and a flange width of 250 mm was rolled, the gap between the lower surface of the housing 28 and the upper surface of the sole plate 27 could be changed in about 5 minutes. This is about 1/5 of the conventional time, and the line stop time is extremely shortened. Further, it was confirmed that there was no problem with the quality and dimensions of the obtained product (H-section steel).

In the present embodiment, the method of increasing the distance from the lower surface of the housing 28 to the upper surface of the flange 27a of the sole plate 27 has been described.
The height adjusting device according to the present invention can of course be applied to a case where the distance from the lower surface of the housing 28 to the upper surface of the flange 27a of the sole plate 27 is reduced. In this case, if the upper liner 32 and the lower liner 31 are relatively moved in a direction in which both the liners 31 and 32 go down the inclined surface, and the total thickness of the upper liner 32 and the lower liner 31 is reduced by a necessary value, Good.

The height adjusting device 37 according to the present invention
The lower liner 31 may be fixed and the upper liner 32 may be relatively moved, or the upper liner 32 may be fixed and the lower liner 31 may be relatively moved. Further, both liners 31 and 32 may be relatively moved. In this embodiment, the universal rolling mill provided with the height adjusting device 37 has been described. However, the present invention is not limited thereto, and the height adjusting device according to the present invention may be provided between the sole plate and the housing of the existing universal rolling mill. The device 37 may be provided.

[0038]

As described above, in the universal rolling mill according to the present invention, the height adjusting device includes the upper liner having the inclined surface on the lower surface, and the inclined surface of the upper liner having the inclined surface on the upper surface. The lower liner and the lower liner, wherein the lower liner and the lower liner are configured to have a lower liner that is in opposing contact with the lower liner, and that a distance between the upper surface of the upper liner and the lower surface of the lower liner is variable by sliding both liners between the inclined surfaces. There in a direction ascending inclined surface, both liners that are moved relative, it is possible to increase the total thickness of both liners can be increased by the thickness of which increases the housing relative source Lumpur plate. Also in the direction of the upper liner and lower liner down the inclined surfaces, both liners that are moved relative, it is possible to reduce the total thickness of both liners, by the thickness of which reduces the housing relative source Lumpur plate descends Can be done. As described above, the housing can be easily raised and lowered by operating the lifting mechanism and the advance / retreat driving device. As a result, the roll center of the vertical roll can be easily set to the height center of the material to be passed. . As a result,
It is possible to provide a universal rolling mill in which the vertical adjustment of the vertical rolls of the reversible rolling mill can be quickly changed by remote control and the adjustment range can be widened. Further according to the invention
If the height adjustment device is mounted on the housing
Between the sole plate and the housing
With only the liner of
Is performed by another lifting mechanism, and the height adjustment device is
Because it is only to determine and maintain the height of the
The retraction drive for moving the liner relative to the
Yes. Therefore, the existing universal rolling mill is
The present invention can be widely applied by modification. Ma
The online positioning of the housing height
This can be done by remotely operating the retraction drive.
Because the equipment installed along the line
The relative movement of the upper and lower liners without interfering with the operation of the
There is also an effect that can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is an overall front view in which a part of a universal rolling mill according to an embodiment of the present invention is omitted.

FIG. 2 is a side view in which a part of the universal rolling mill shown in FIG. 1 is omitted.

FIG. 3 is a diagram showing a main part of the universal rolling mill shown in FIG.

FIG. 4 is a diagram showing a main part of the universal rolling mill shown in FIG.

FIG. 5 is a schematic diagram of an H-section steel rolling facility.

FIG. 6A is a sectional view of a slab. (2)
It is sectional drawing of a bloom. (3) is a sectional view of the beam blank.

FIG. 7 is a view showing a shape of a groove used in rolling of an H-section steel.

FIG. 8A is a diagram showing a rolling state by a rough universal rolling mill. (2) is a figure which shows the rolling situation by the rolling mill by an edger rolling mill. (3) is a figure which shows the rolling situation by a finishing universal rolling mill.

FIG. 9 is a diagram showing the arrangement of rolls of a universal rolling mill.

FIG. 10 is a front view of an H-section steel.

FIG. 11 is a diagram showing a relationship between a flange width center of an H-shaped steel and a roll center of a vertical roll.

FIG. 12 is a sectional view showing a part of a conventional universal rolling mill.

FIG. 13 is a sectional view showing a part of a conventional universal rolling mill.

FIG. 14 is a sectional view showing a part of a conventional universal rolling mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Breakdown rolling mill 12 Coarse universal rolling mill 13 Edger rolling mill 14 Coarse universal rolling mill group 15 Finishing universal rolling mill 26 Foundation 27 Sole plate 28 Housing 29 Base part 31 Lower liner 32 Upper liner 35 Advance / retreat drive device 36 Advance / retreat member 37 Height Height adjustment device 41 Horizontal roll 42 Horizontal roll 44 Rolled material 45 Vertical roll 46 Vertical roll 47 Lower flange

Claims (1)

(57) [Claims] 1. A universal rolling mill housing including a pair of horizontal rolls sandwiching a material to be rolled from above and below and a pair of vertical rolls sandwiching the material to be rolled from left and right,
A universal rolling mill comprising a lifting mechanism that is mounted on an upper surface of a sole plate via a height adjustment device and that raises and lowers the lower surface of the housing, wherein the height adjustment device has an inclined surface on a lower surface. An upper liner having an upper surface, a lower liner having an inclined surface on the upper surface and in contact with the inclined surface of the upper liner, and sliding the two liners between the inclined surfaces to form an upper surface of the upper liner and a lower surface of the lower liner. a reciprocating drive device for a distance variable, constituted by the forward and backward
A drive device which is remotely controllable and which is
A universal rolling mill mounted on the side .