JP3037513B2 - Guide device for rough rolling mill and method for guiding rolled material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide device and a method for guiding a material to be rolled in a continuous hot rolling mill, and more particularly to a VH tandem rolling method using an edger mill and a horizontal mill disposed on its exit side. The present invention relates to a guide device and a guide method suitable for preventing bending of a material to be rolled when performing.

[0002]

2. Description of the Related Art Rough rolling mills in a hot continuous rolling mill row are:
Since it is necessary to control the width of the material to be rolled, a plurality of sets of mills for performing so-called VH tandem rolling are generally provided by an edger mill and a horizontal mill disposed on the exit side thereof. In this case, a side guide is provided on the entry side of the edger mill to guide the material to be rolled to the edger mill,
There is no side guide on the exit side of the horizontal mill.

The side guide on the entry side of the edger mill waits until the material to be rolled enters with the interval set to be about 50 to 100 mm wider than the width of the material to be rolled, and furthermore, while maintaining that state, the side guide at the interval is maintained. While centering the material to be rolled within the range, the material is guided to an edger mill and a horizontal mill. In addition, the technology of improving the side guides on the entrance side of the edger mill was applied by hydraulic drive, as reported in the 51st Hot Strip Subcommittee 51-4 of the Iron and Steel Institute of Japan as "measures to improve thin material passing property". In some cases, the rolled material is centered.

Further, as disclosed in Japanese Patent Application Laid-Open No. 63-101004, a side guide installed between an edger mill and a horizontal mill has been proposed. This guide is also the standby type side guide described above.

[0005]

FIG. 10 shows a bent state of a material to be rolled which occurs in rough rolling of a hot continuous rolling mill. FIG. 10 (a) shows the center line of the material to be rolled after rolling by the roughing mill R4 mill, and the leading end (LE) of the material to be rolled is shown.
And the rear end (TE) is bent toward the drive (DR) side,
Similarly, FIG. 10 (b) shows a state after rolling by an R5 mill, wherein the leading end is S-shaped bent toward the driving side and the rear end is bent toward the operation (OP) side. Such bending occurs in the range of 3 to 5 m at the front and rear ends of the material to be rolled, and this so-called nose bending has a bad influence on the threadability of the finishing mill and the occurrence of drawing.

The occurrence of bending is caused by the off-center of the material to be rolled, the temperature difference in the width direction, the one-side pressure of the mill, and the like. As described above, in the standby type side guide for guiding the material to be rolled while maintaining the standby state, as described above. However, since the degree of opening is set to be large because it is necessary to smoothly enter the material to be rolled, the occurrence of bending cannot be completely prevented. Even if the centering is simply performed by a hydraulically driven side guide on the entrance side of the edger mill, it is difficult to prevent the subsequent bending.

In particular, at the leading end of the material to be rolled, no side guide is provided on the exit side of the horizontal mill, and at the rear end, the bend becomes large because the guide is not sufficiently guided after the trailing end passes through the edger mill. Various problems have arisen in the finish rolling. The present invention relates to a guide device for a rough rolling mill capable of minimizing the bending generated at the front and rear ends of a material to be rolled when performing VH tandem rolling by an edger mill and a horizontal mill disposed on the exit side thereof, and An object of the present invention is to provide a method for guiding a material to be rolled.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a guide device for a rough rolling mill when a VH tandem rolling is performed by an edger mill of a row of hot continuous rolling mills and a horizontal mill disposed on an exit side thereof, and a guide device. A method for guiding a rolled material, comprising:
The guide device of the invention of the invention, the edger mill entrance side, the horizontal mill exit side, between the edger mill and the horizontal mill, other equipment
Operates independently and keeps the left and right guides parallel
Side guides that can be opened and closed to adjust the guide spacing
It is established, and, at least the Ejjamiru entry side of the side guide is configured to use a centering side guides lateral guide with respect to the center of the rolling line is opened and closed symmetrically, also, the guide method of the invention of claim 2 is The left and right sides of the edger mill inlet, horizontal mill outlet, and edger mill and horizontal mill operate independently of other equipment.
Guides can be opened and closed while maintaining parallelism to adjust guide spacing
The side guides on the edge side of the edge mill are slightly opened after the centering of the material to be rolled is performed at the same time as the leading edge of the material to be rolled in. With the entry of the edger mill and the horizontal mill, the side guide between the edger mill and the horizontal mill is tightened so that the interval between the edge of the rolled material and the side edge of the material to be rolled becomes a predetermined small value, with the edger mill being disengaged at the rear end of the material to be rolled. The above-mentioned problem in the conventional technique is solved by maintaining the above-described state until the rear end of the material to be rolled passes through each side guide.

According to a third aspect of the present invention, there is provided a guide device including a horizontal mill, and an edger mill disposed upstream of the horizontal mill, wherein a material to be rolled is rolled in the width direction by the edger mill and the thickness is reduced by the horizontal mill. In a rolling mill row configured to roll in the direction, between the horizontal mill and the edger mill, a pair of left and right side guides for regulating the widthwise deviation of the material to be rolled, and the upper and lower sides that sandwich the material to be rolled from above and below The guide device of the invention according to claim 4 is characterized in that a pair of pinch rolls are provided, and a horizontal mill and an edger mill are arranged upstream of the horizontal mill. A pair of left and right side guides and a pair of upper and lower pinch rolls sandwiching the material to be rolled from above and below are provided, and rolling is performed by applying reduction in the width direction and thickness direction. In the row, a detector for detecting the passage of the material to be rolled and a signal from the detector to calculate the timing at which the rearmost end of the material to be rolled passes through the edger mill, and a signal from the calculator. A setting device for changing a set value of the pinch force of the pinch roll, and a controller for controlling a pressing force of the pinch roll based on a signal from the set device. Further, the guide method according to the fifth aspect of the present invention, when rolling is performed by the rolling mill train according to the third or fourth aspect, detects a timing at which the rearmost end of the material to be rolled passes through the edger mill, and at that time, The present invention is characterized in that control is performed to increase the pressing force of the pinch roll against the material to be rolled.

[0010]

First, in the guide device of the rough rolling mill according to the first aspect of the present invention , other equipment (for example , an edger mill inlet side, a horizontal mill outlet side, and an edger mill and a horizontal mill) are provided .
Operates independently of other side guides or rolling stands)
And the left and right guides open and close while maintaining parallelism
Install side guides with adjustable guide spacing
You. As the side guide on the entry side of the edger mill, a centering side guide whose left and right guides open and close symmetrically with respect to the center of the rolling line is used.

In the guide method according to the second aspect of the present invention, the side guide on the entry side of the edger mill performs centering in a state where the rolled material is lightly pinched at the same time as the leading edge of the rolled material enters, and then about 10 to 20 mm. Open and guide the material to be rolled to the edger mill. For this reason, the material to be rolled is accurately guided to the edger mill over the entire length. Next, almost simultaneously with the leading end of the material to be rolled entering the side guide on the exit side of the horizontal mill, the material is tightened so that the distance from the side edge of the material to be rolled becomes a predetermined small value of 5 to 10 mm. On the other hand, the side guide between the edger mill and the horizontal mill is tightened in the same manner as the horizontal mill exit side guide until the edge of the rolled material is released. Therefore, the widthwise movement of the material to be rolled is suppressed to the range of a slight gap with these side guides, and even if bending occurs, it can be limited to the range.

The side guides each have an opening of 10 to 20 mm wider than the width of the material to be rolled while passing through the material to be rolled. However, when these guides have vertical guide rollers, they are made smaller. Is what you can do. Also, the initial opening degree (standby state) of each side guide is set to a state wider by about 50 to 200 mm than the width of the material to be rolled.

In the guide device according to the third and fourth aspects of the present invention, the side guide and the pinch roll provided between the edger mill and the horizontal mill regulate the lateral displacement of the material to be rolled and bend horizontally. (Camber) is prevented. In particular, in the final stage of rolling, the trailing end of the material to be rolled is prevented from meandering by being free from the restraint by the edger mill, and as a result, local planar bending of the trailing end is effectively prevented. Further, in the guide method according to the fifth aspect of the present invention, the final stage of rolling, that is, the time when the last end of the material to be rolled passes through the edger mill and the binding force is lost, is detected, and at that time, the material to be rolled by the pinch roll is detected. By increasing the pressing force on the rolled material, the widthwise restraining force is maintained at the same level as before, thereby reliably preventing the bending of the rearmost end of the material to be rolled due to the meandering.

[0014]

1 and 2 are drawings showing an embodiment of a guide device according to the present invention. FIG. 1 is a plan view, and FIG.
3 is an explanatory view of the guide method according to the present invention, FIG. 4 is a graph comparing the frequency of occurrence of bending of the material to be rolled according to the guide use method, and FIG. 5 is a plurality of edger mills. It is a top view which shows the example of the guide device in the case of the tandem rolling by the combination of a horizontal mill.

In FIG. 1, a material 1 to be rolled advances in the direction of an arrow X, and VH tandem rolling is performed by an edger mill 2 and a horizontal mill 3 disposed on the exit side thereof. Reference numeral 5 denotes a side guide installed on the entry side of the edger mill 2, as shown in FIG. 2, a hydraulic cylinder 51 through a pinion 53 of a pinion stand 52 and rack beams 54, 54 to a center Y-Y of a rolling line. By opening and closing the guides 5 and 5 symmetrically, centering of the material to be rolled 1 is possible. Reference numeral 6 denotes a side guide installed on the exit side of the horizontal mill 3, which is guided by a hydraulic cylinder 61.
The distance between the side guides 6 is adjustable, and in this example, like the edge guider 2 entrance side guide 5, a side guide of a centering type using a rack and pinion is used.

Reference numeral 7 denotes a side guide provided between the edger mill 2 and the horizontal mill 3, which is attached to the tip of a rod 72 penetrating through the housing post 4 of the horizontal mill 3, and the distance between the rods 72 is adjustable by a hydraulic cylinder 71. ing. So
These side guides 5, 6, 7 are connected to other devices (for example, other
Independent of side guides and rolling stands)
And the left and right guides always remain parallel.
The material to be rolled 1
Can be accurately guided. The driving of these side guides 5, 6, 7 does not necessarily have to be performed by a hydraulic cylinder, but a hydraulic system is more preferable in view of controllability such as responsiveness. In addition, these side guides 5, 6,
The configuration of 7 operates independently of other equipment and
The guide is opened and closed while maintaining parallelism to adjust the guide interval.
The present invention is not limited to this embodiment as long as it is available. The side guides on the entrance side of the edger mill only need to be capable of being centered, and the other two side guides need only be capable of controlling the position of the guides. .

In FIG. 3, (a) shows the tip 11 of the material 1 to be rolled.
Enters between the parallel portions of the entry side guides 5 and 5 of the edger mill 2, and the interval between the side guides 5 and 5 is tightened in the Z direction to become equal to the width B of the material 1 to be rolled, and the material to be rolled 1
3 shows a state in which centering is being performed. After the centering is completed, the side guides 5 and 5 are slightly opened, and the interval W1 is set to 10 to 20 mm wider than the width B of the material 1 to be rolled. At the time of FIG. 3A, the opening degree of the side guides 6, 6, 7 and 7 is set to an interval W0 that is 50 to 200 mm wider than the width B of the material 1 to be rolled.

Next, FIG. 3 shows a state in which the leading end 11 of the material 1 to be rolled enters between the side guides 6 on the exit side of the horizontal mill 3.
(B). When the leading end 11 of the material to be rolled 1 enters between the side guides 6, it is quickly tightened in the Z direction, and the opening is set to W1. In this state, VH tandem rolling by the edger mill 2 and the horizontal mill 3 is performed. The detection of the entry of the leading end 11 of the material to be rolled 1 between the side guides 5, 5, 6 and 6 may be performed by using a detection signal of an HMD (Hot Steel Detector). And that signal can be used.

Then, as soon as the rear end 12 of the material 1 to be rolled is released from the edger mill 2, the side guides 7, 7 between the edger mill 2 and the horizontal mill 3 are tightened to W1. In this case, it is preferable to predict the time when the rolled material is released from the edger mill 2 and start tightening the side guides 7 in advance. The tightening is started by a signal from a rear end detection HMD or the like installed on the entry side of the edger mill 2.

Then, after the rear end 12 of the material 1 to be rolled has passed through each of the side guides 5, 6, and 7, the opening thereof is gradually increased to W0. FIG. 4 shows that when the side guide on the entrance side of the edger mill is set to an opening 50 to 100 mm wider than the width of the material to be rolled and used as a standby system, when the side guide on the entrance side of the edger mill is used as a centering system, When the method of the present invention is carried out with the side guides also provided between the exit side and the edger mill and the horizontal mill, after rolling 500 rolls each in the R3 mill of the rough rolling mill for each case, 5 is a graph comparing the occurrence frequencies of the bendings measured in FIG.

As can be seen from this figure, a bend exceeding 50 mm has occurred. Although the occurrence of bends exceeding 30 mm is reduced, large bends are not completely eliminated. This is presumably because the roll friction cannot sufficiently cope with disturbances such as temperature distribution in the width direction of the material to be rolled. On the other hand, when the method of the present invention was applied using the side guide device according to the present invention, the bending of all the rolled materials could be suppressed to 20 mm or less.

The above description has been made on the case where the combination of the edger mill and the horizontal mill exists alone in the rough rolling mill.
If the mill is of the VHVH tandem type, a side guide is installed as shown in FIG. In this case, the entrance side guide 50 of the edger mill E4 on the most upstream side.
Is a side guide for centering, and the horizontal mill R
The side guides 60, 60 on the exit side of 4 and R5 are the same as the side guide 6 on the exit side of the horizontal mill described above, and the side guide 70 between the edger mill E4 and the horizontal mill R4 and the side guide between the edger mill E5 and the horizontal mill R5. The guide 70 is used similarly to the side guide 7 between the edger mill and the horizontal roll described above.

Next, another embodiment of the guide device according to the present invention will be described with reference to FIGS. FIG. 6 and FIG. 7 are a plan view and a side view schematically showing a schematic configuration of the guide device of the present embodiment. The same reference numerals are given to the same components as those in the above embodiment. The rolling mill train in the present embodiment includes a horizontal mill 3 having a pair of work rolls a and b for rolling the material 1 to be rolled in the thickness direction, similarly to the above-described embodiment, An edger mill 2 provided with a pair of vertical rolls c and d provided on the upstream side in the width direction for performing rolling in the width direction is provided. Guide 7,
7 is provided, and a pair of upper and lower pinch rolls 80, 80 are provided. Sign 2
Numeral 1 denotes a vertical cylinder for the vertical rolls c and d, and numeral 31 denotes a vertical cylinder for the work roll b.

The side guides 7, 7 are arranged opposite to each other in the width direction of the material 1 to be rolled to regulate the displacement of the material 1 to be rolled in the width direction, similarly to the above-described embodiment. The position and the interval between the members 1 can be adjusted by the hydraulic cylinder 71 in accordance with the width and the like. The pinch rolls 80, 80 roll freely while sandwiching the material 1 to be rolled from above and below. The pressing force against the material 1 to be rolled, that is, the pinch force, can be adjusted by the hydraulic cylinder 81.

In this embodiment, a side guide is provided further upstream of the edger mill 2 for centering and guiding the material 1 to be rolled to the edger mill 2 by being driven by the hydraulic cylinder 51 in the same manner as in the above embodiment. 5 are provided.

In the rolling mill train having the above configuration, the edge mill 2
The widthwise deviation of the material 1 to be rolled is regulated by the side guides 7, 7 and the pinch rolls 80, 80 between the horizontal mill 3 and the horizontal mill 3. Therefore, the plane in the width direction of the material 1 to be rolled during normal rolling is controlled. Of course, it is possible to prevent a bend (camber), and in particular, to ensure a local bend limited to a rear end caused by lateral displacement (meandering) of the material after the rear end of the material to be rolled 1 has passed through the edger mill 2. Can be prevented. That is, in the conventional rolling mill train, when the rear end of the material to be rolled 1 passes through the edger mill 2, the widthwise restriction is lost, and the rear end of the material to be rolled 1 is exposed to the temperature difference between the left and right of the material and the horizontal mill. Due to factors such as the non-uniformity of the roll gap in No. 3, lateral displacement (meandering) easily occurs in the width direction. Therefore, the material to be rolled 1 is locally bent at the rear end. On the other hand, in the row of rolling mills according to the present embodiment, as shown in FIG. , 80 restricts the movement in the width direction, so that the meandering of the material to be rolled 1 can be prevented, and as a result, local bending generated at the rear end of the material to be rolled 1 can be prevented.

By the way, the pinch force of the pinch rolls 80, 80 with respect to the material 1 to be rolled may be appropriately set in consideration of the restraining force of the side guides 7, 7 in the width direction. It is preferable to control so as to further increase the pressure. In other words, during normal rolling, that is, when rolling in the width direction is performed by the edger mill 2, the pinch force of the pinch rolls 80 and 80 needs to be significantly increased because the width direction restraining force is applied by the edger mill 2. There is no. However, when the rear end of the material to be rolled 1 passes through the edger mill 2, the restraining force by the edger mill 2 does not act. At that point, the pinch force by the pinch rolls 80 is increased, and thereafter, the rolling force is substantially equal to that in normal rolling. It is controlled so as to secure the binding force of. When the pinch force is increased, the frictional force μP between the pinch rolls 80 and 80 and the material 1 to be rolled (μ is the friction coefficient between the pinch roll 80 and the material 1 to be rolled, and P is the pinch force) As the binding force increases, it is possible to prevent the rolled material 1 from meandering and trying to ride on the side guides 7. In this manner, meandering after the rear end of the material 1 has passed through the edger mill 2 can be prevented.
The occurrence of bending at the rear end can be reliably prevented.

FIG. 9 is a schematic configuration diagram showing still another embodiment of the present invention. Reference numeral 82 denotes a detector of the material 1 to be rolled, and detects a time point at which the rearmost end of the material 1 has passed through the detector 82. Reference numeral 83 denotes a tracking circuit, which receives a signal from the detector 82 that has passed the rearmost end of the material 1 to be rolled,
Is calculated, and a timing signal is output to the pressure setter 84. The pressure setting device 84 is a setting device for setting the pressing pressure of the pinch roll 80, and changes the set pressure in response to a timing signal from the tracking circuit 83 that the rearmost end of the material 1 passes through the edge mill 2. Reference numeral 85 denotes a controller for changing the pressure of the hydraulic cylinder 81, and a set value signal from the setter 84 and the hydraulic cylinder 81.
The signal from the pressure detector 86 is compared and calculated by a calculator (not shown) to control the opening of a hydraulic valve (not shown), thereby setting the force with which the hydraulic cylinder 81 presses the pinch roll 80. It has a function to keep the set value of the device 84.

The operation of this embodiment will be described with reference to FIG.
When the detector 82 detects the timing at which the material 1 has passed the position of the detector 82, a timing signal is sent to the tracking circuit 83. The tracking circuit 83 calculates the time until the rearmost end of the rolled material 1 passes through the edger mill 2 based on the traveling speed of the rolled material 1 at that time and the distance between the detector 82 and the edger mill 2. Then, a timing signal is sent to the pressure setting device 84 when the rearmost end of the material 1 passes through the edger mill 2. Setting device 8
4 receives the signal and inputs a new set value higher than the current set value to the controller 85. The controller 85 drives the hydraulic valve based on the set value to control the amount of oil flowing into and out of the hydraulic cylinder 81. Thereby, the pressing pressure of the hydraulic cylinder 81 against the pinch roll 80 changes. The pressure of the hydraulic cylinder 81 is detected by a pressure detector 86 and compared with a set value by a controller 85. When the set value is matched, the operation of the hydraulic valve is stopped, and the pinch roll 80 is rolled at a new set pressure higher than usual. Material 1 is pressed. In this manner, the pressing force of the pinch roll 80 against the material 1 to be rolled is increased, and for the reason described above, meandering after the rear end of the material 1 to be rolled has passed through the edger mill 2 is prevented, and as a result, The local flat bending of the rear end of the material 1 to be rolled is prevented.

When the present invention is applied to a rolling mill for performing reverse rolling, similar edger mills, side guides and pinch rolls may be provided symmetrically with a horizontal mill interposed therebetween. Also, the horizontal mill has been described as an example of a double type having a pair of work rolls. However, a quadruple rolling mill having a counter roll for supporting each work roll may be used. In the above examples, the pinch roll that sandwiches the material to be rolled from above and below is applied with a pinch force by a hydraulic cylinder, but the lower pinch roll is fixed and the upper pinch roll is used. It goes without saying that various changes can be made without departing from the gist of the present invention, for example, the pressing may be performed only by pressing. Furthermore, in both the horizontal mill and the edger mill, the screw-down device was shown as an example of fluid drive using a cylinder, but an electric type that drives a screw with an electric motor,
Alternatively, it is needless to say that a type in which both are combined may be used.

[0031]

According to the first and second aspects of the present invention, when the guide device and the method for guiding a material to be rolled of the rough rolling mill are implemented, the material to be rolled after the rough rolling hardly bends. In particular, it operates independently of other devices as a side guide
And the left and right guides open and close while maintaining
The adoption of an adjustable id spacing provides excellent responsiveness.
And accurate centering is possible. Therefore,
Since a material having no bend can be supplied to the subsequent finish rolling, the finished semi-finished product is infinite, and the occurrence of drawing can be reduced to about 1/10 of the conventional one.

Further, according to the guide device of the rough rolling mill according to the third and fourth aspects of the present invention, a pair of left and right side guides for regulating a widthwise displacement of the material to be rolled between the horizontal mill and the edger mill. And a pair of upper and lower pinch rolls for sandwiching the material to be rolled from above and below, respectively, so that the side guide and the pinch rolls can restrict bending in the width direction of the material to be rolled, thereby preventing bending. ,
In particular, meandering of the material to be rolled after the rear end of the material to be rolled has passed through the edger mill in the final stage of rolling can be prevented, whereby bending at the rear end of the material to be rolled can be reliably prevented. Further, according to the guide method according to the fifth aspect of the present invention, when rolling is performed using the above-described rolling mill train, the pinch force applied to the rolled material by the pinch roll when the rear end of the rolled material has passed through the edger mill. In the final stage of rolling, in which the width constraint by the edger mill has disappeared, the width direction constraint force can be maintained at the same level as before. The bending of the material to be rolled can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a guide device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram of a guide method according to the present invention.

FIG. 4 is a graph comparing the frequency of occurrence of bending of a material to be rolled for each method of using a guide.

FIG. 5 is a plan view showing an example of a guide device in the case of tandem rolling by a combination of a plurality of edger mills and a horizontal mill.

FIG. 6 is a plan view showing another embodiment of the guide device according to the present invention.

FIG. 7 is a side view of the same.

FIG. 8 is a plan view showing a state of a final rolling stage in a rolling mill row to which the apparatus is applied.

FIG. 9 is a side view showing still another embodiment of the guide device according to the present invention.

FIG. 10 is an explanatory view showing a state of bending of a material to be rolled which occurs in rough rolling of a hot continuous rolling mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolled material 2 Edger mill 3 Horizontal mill 4 Housing post 5 Edger mill inlet side guide 6 Horizontal mill outlet side guide 7 Inter-mill side guide 50 Edger mill inlet side guide 51 Hydraulic cylinder 52 Pinion stand 53 Pinion 54 Rack beam 60 Horizontal mill Discharge side guide 61 Hydraulic cylinder 70 Side guide between mills 71 Hydraulic cylinder 72 Rod 80 Pinch roll 81 Hydraulic cylinder 82 Detector 83 Tracking circuit 84 Setting device 85 Controller 86 Pressure detector.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroaki Kuwano 1st Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawajima-Harima Heavy Industries Co., Ltd.Yokohama 2nd factory (72) Inventor Katsumi Okada Shinnaka, Isogo-ku, Yokohama-shi, Kanagawa No. 1 Haramachi Ishikawajima-Harima Heavy Industries Co., Ltd. Yokohama No. 2 Factory (72) Inventor Takeshi Fujitsu 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. Kawasaki Steel Co., Ltd. Mizushima Works (72) Inventor Katsumi Kawakami Okayama 1-chome, Mizushima-Kawasaki-dori, Kurashiki City (without address) Inside Mizushima Steel Works, Kawasaki Steel Co., Ltd. (72) Inventor Makoto Samurai 1-chome, without-addresses, Kawasaki-dori, Mizushima, Kurashiki City, Okayama Prefecture (72) Mizushima Works, Kawasaki Steel Corporation (72) Inventor Tetsuro Shima 1-chome, Kawasaki-dori, Mizushima, Kurashiki-shi, Okayama Prefecture (without address) Kawasaki Steel Corporation Mizushima Works (72) Inventor Shinji Tanaka 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (without address) Kawasaki Steel Corporation Mizushima Works (72) Inventor Hideyuki Nikaido 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corporation Inside steelworks (56) References JP-A-4-158914 (JP, A) JP-A-5-84506 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 39/14

Claims (5)

(57) [Claims] 1. A guide device for a rough rolling mill when performing VH tandem rolling by an edger mill of a row of hot continuous rolling mills and a horizontal mill disposed on an outlet side thereof, comprising: Operates independently from other equipment and guides left and right between the mill exit side and the edger mill and horizontal mill.
Can be opened and closed while maintaining parallelism to adjust the guide spacing.
The Idogaido installed respectively, and at least the Ejjamiru entry side of the side guide is rough rolling mill guide apparatus characterized by the use of centering side guides lateral guide with respect to the center of the rolling line is opened and closed symmetrically. 2. A method for guiding a rolled material of a rough rolling mill when performing VH tandem rolling by an edger mill of a row of hot continuous rolling mills and a horizontal mill disposed on an outlet side thereof, comprising: And the horizontal mill outlet, between the edger mill and the horizontal mill , operate independently of other equipment and
Right guide opens and closes while maintaining parallelism to adjust guide spacing
A free side guide is provided, and the side guides on the edge mill side are slightly opened after centering the rolled material at the same time as the leading edge of the rolled material enters. With the entry of the leading end, and the side guide between the edger mill and the horizontal mill with the edger mill biting of the rear end of the material to be rolled,
Each of the rough rolling mills is tightened so that the interval between the side edges of the material to be rolled becomes a predetermined small value, and the above state is maintained until the rear end of the material to be rolled passes through each side guide. Rolled material guide method. 3. A rolling mill train in which a horizontal mill and an edger mill are arranged upstream of the horizontal mill, and the material to be rolled is rolled in the width direction by the edger mill and rolled in the thickness direction by the horizontal mill. A pair of left and right side guides for regulating the widthwise displacement of the material to be rolled, and a pair of upper and lower pinch rolls sandwiching the material to be rolled from above and below, between the horizontal mill and the edger mill. A guide device for a rough rolling mill. 4. A horizontal mill, an edger mill disposed upstream of the horizontal mill, and a pair of left and right side guides and a pair of upper and lower pinch rolls for sandwiching the rolled material from above and below are provided between the horizontal mill and the edger mill. In a rolling mill train that performs rolling by applying rolling in the direction and thickness direction, a detector that detects the passage of the material to be rolled and a signal from the detector, and the rearmost end of the material to be rolled passes through the edger mill. A computing device for calculating timing, a setting device for changing a set value of the pinch force of the pinch roll based on a signal from the computing device, and controlling a pressing force of the pinch roll based on a signal from the setting device A guide device for a rough rolling mill, comprising: 5. When rolling is performed by the rolling mill train according to claim 3 or 4, a timing at which the rearmost end of the material to be rolled passes through the edger mill is detected, and at that time, the material to be rolled by the pinch roll is detected. A method for guiding a material to be rolled in a rough rolling mill, wherein the method is controlled so as to increase the pressing force.