JP2000061522A - Device for turning thick plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the turning time of a thick plate by installing a rotation assisting device which is usually positioned under the table top of the roller table and which is composed of a lever for pushing the plate only at the time of assisting the turning and a driving device for driving the lever in the axial direction of a roller, between the rollers of the roller table. SOLUTION: The rotary rollers 4 of a turning device 2 are arranged so that large-diameter parts and small-diameter parts are alternately arranged and mutually reversely rotated at the time of turning the thick plate 1. The rotation assisting device 8 is arranged between the rotary rollers 4 and the turning assisting device 8 has functions by which the lever is driven by a driving means such as a hydraulic cylinder at the time of starting the turning of the plate 1, the side face of the plate 1 is pushed with that lever and the is assisted. The assisting lever is constructed so that it is usually arranged so as to be positioned under the table top of the turning device 2, positioned above the table top only at the time of assisting the turning and pushing the side face of the plate 1. The lever is pivoted on its supporting point and moved vertically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a slab rolling device in a reverse type thick plate rolling line in which a slab is rolled into a thick steel plate.

[0002]

2. Description of the Related Art A thick plate rolling mill has a step of rotating a thick plate (slab) by 90 ° in order to perform tenter rolling after the completion of forming and rolling of the thick plate (slab). In Figure 2,
The top view of the plate rolling line is shown. The slab 1 is
It is reciprocally conveyed back and forth on the conveyance table 5, and is rolled a predetermined number of times by the plate rolling mill 6. At this time, the thick plate (slab) 1 is turned by 90 ° if necessary for the width of the thick plate or the like.

This turning is carried out by a turning device (turning table) 2 in which a large number of turning rolls 4 having different diameters are arranged at the center of the conveying line. The turning rolls 4 are arranged so that the large-diameter portions and the small-diameter portions are alternately arranged, and the thick plates 1 are turned by rotating these turning rolls in opposite directions. Here, at the time of turning, the side guide 3 is appropriately moved to position the thick plate to facilitate turning. Needless to say, when the thick plate 1 is simply transported, the turning rolls are all rotated in the same direction in accordance with the transport direction.

[0004]

However, in the turning device as described above, it takes a certain time until the thick plate starts to rotate from the stationary state, which is a problem. The time until the thick plate starts to rotate is greatly affected by the size, shape, and the like of the thick plate, and particularly, the influence of the warp of the thick plate is large.

The present invention provides a thick plate rolling device capable of shortening the rolling time of the thick plate regardless of the above influence.

[0006]

SUMMARY OF THE INVENTION The present invention facilitates the rolling of a thick plate by adding a device for assisting the rolling of the thick plate at the beginning of the rotation of the thick plate to the conventional rolling device. , It is intended to shorten the turning time. That is, the present invention is a roller table in which rolling rolls, one of which is a large diameter portion and the other of which is a small diameter portion, are alternately arranged such that the large diameter portion and the small diameter portion are adjacent to each other with a substantially central portion of the roll as a boundary to form a roller table. In the plate rolling device, the rolling assist device, which is normally located under the table surface of the roller table and configured to push the thick plate only when assisting the rolling, and a drive device that drives the lever in the roll axis direction, is the roller. The above problem was solved by the thick plate rolling device installed between the rolls of the table.

It has also been found that the lever is preferably a lever that rotates about a fulcrum as an axis. Furthermore, they have found that it is also preferable to use a lever that moves up and down as the lever.

[0008]

DETAILED DESCRIPTION OF THE INVENTION A plan view of a thick plate rolling device of the present invention is shown in FIG. Turning roll 4 in turning device 2
Are different in diameter at the center of the transfer line, and are arranged so that the large diameter portion and the small diameter portion are alternately arranged,
A turntable is configured. Then, these turning rolls are made to rotate in opposite directions to each other when the thick plate 1 is turned.

Here, in the present invention, the turning roll 4
The feature is that the turning assist device 8 is arranged between the two. The turning assist device 8 has a function of driving a lever by a driving means such as a hydraulic cylinder when the turning of the thick plate 1 is started, and pushing the side surface of the thick plate by the lever to assist the turning. As a matter of course, the lever of the auxiliary device is always located below the table surface of the turning device, and is located above the table surface only when assisting the turning and pushes the side surface of the plank. It has a structure.

A turning assist device 8 according to the first embodiment of the present invention is shown in FIG. In FIG. 3, the trolley-driving hydraulic cylinder 11 of the turning assist device 8 is fixedly mounted on the base 7. The rod of the hydraulic cylinder 11 is joined to the truck 15, and the truck 15 is moved according to the turning position of the thick plate. The dolly 15 is driven on the dolly rail 14. Here, in order to prevent the bogie 15 from being lifted up, the bogie rail 14 preferably has a structure in which the wheels of the bogie are sandwiched. When the position of the carriage 15 is determined, the carriage is fixed, and the lever 13 is rotated by the lever-driving hydraulic cylinder 12 on the carriage. The lever 13 is normally located below the table surface of the turning table, and by this rotation, it comes into contact with the side surface of the thick plate on the table surface to assist the turning of the thick plate.

Next, FIG. 4 shows a turning assist device 8a according to a second embodiment of the present invention. In Figure 4, the lever
13a has a vertical structure. As a matter of course,
During standby, the lever 13a is at the lower limit and its tip is below the table surface of the turning table. Then, when assisting the turning of the thick plate, the lever driving hydraulic cylinder 12a is driven, and the lever 13a becomes the upper limit position. Then, the dolly is driven by driving the dolly-driving hydraulic cylinder 11a, and the lever is brought into contact with the side surface of the thick plate to assist the rolling of the thick plate.

[0012]

EXAMPLE The rolling assist device shown in FIG. 3 was attached to the rolling device of the plate rolling line. The slabs processed by the plate rolling line have a thickness of 50 to 200 mm, width of 1000 to 5350 mm, and length of 10
It is from 00 to 5350 mm. In the conventional turning device, the slab turning time (the time from the biting of the rolling mill in the previous pass to the completion of turning) is 6 to 12 seconds, which requires an average of 7 seconds.

However, by applying the present invention, the turning can be completed in an average of 6 seconds, and the time reduction of 1 second can be realized.

[0014]

According to the present invention, it is possible to shorten the time until the start of turning of the thick plate turning device. According to the present invention, the turning work efficiency can be significantly improved without being affected by the size and shape of the thick plate.

[Brief description of drawings]

FIG. 1 is a plan view (a) of a turning device of the present invention and its AA.
It is a view (b).

FIG. 2 is a plan view illustrating a plate rolling device in a plate rolling line.

FIG. 3 is a front view showing an example of a turning assist device applied to the present invention.

FIG. 4 is a front view showing another example of the turning assist device applied to the present invention.

[Explanation of symbols]

1 slab (thick plate) 2 Turn device (turn table) 3 Side guide 4 turning rolls 5 transport rolls 6 (Thick plate) rolling mill 7 base 8,8a Turning assist device 11, 11a (for trolley drive) hydraulic cylinder 12, 12a (for lever drive) hydraulic cylinder 13, 13a lever 14 dolly rail 15 dolly

Claims (3)

[Claims] 1. A thick plate as a roller table in which rolling rolls, one of which is a large diameter portion and the other of which is a small diameter portion, are alternately arranged so that the large diameter portion and the small diameter portion are adjacent to each other with a substantially central portion of the roll as a boundary. In the turning device, the turning assist device, which is normally located below the table surface of the roller table and configured to push the thick plate only when assisting turning, and a drive device that drives the lever in the roll axis direction, is the rolling table. A plate rolling device installed between rolls. 2. The thick plate rolling device according to claim 1, wherein the lever is a lever that rotates about a fulcrum as an axis. 3. The thick plate rolling device according to claim 1, wherein the lever is a lever that moves up and down.