JP3915556B2 - Method and apparatus for lateral movement of rolled material in caliber rolling - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for laterally moving a rolled material in caliber rolling, and more particularly, to a method and an apparatus for laterally moving a rolled material with a manipulator so that the rolled material faces a predetermined caliber on a roller table.
[0002]
[Prior art]
In order to roll a large ingot such as a slab or bloom produced by continuous rolling into a billet for steel bar rolling or steel pipe rolling, the bulk rolling by a roll having a caliber is performed by a breakdown mill. This partial rolling is performed by passing slabs, blooms, and the like, which are rolling materials, sequentially through calibers having different opening sizes, and gradually reducing the cross section thereof, and is generally performed by reverse rolling. For this reason, the rolled material is transported in the longitudinal direction on the roller table and is laterally moved (also referred to as “horizontal holding”) on the roller table so as to face a predetermined caliber. In some cases, a 90 ° rotation is made before the lateral movement.
[0003]
In this lateral movement, the operating surface of the manipulator usually attached to the roller table is sandwiched between the side surfaces of the rolling material, the manipulator is moved laterally, and the rolling material is moved in a direction perpendicular to the conveying direction of the roller table. This is done by sliding. Therefore, in this lateral movement, the bottom surface of the rolled material is easily crushed with a roller table.For example, in a billet for rolling a 13Cr stainless steel pipe, this crease remains in the product. There is an increase in the number of man-hours for maintenance. Therefore, in the case of caliber rolling of such a material, it is necessary to prevent the occurrence of wrinkles accompanying horizontal holding, but no specific means for that has been proposed in the past.
[0004]
[Problems to be solved by the invention]
However, it is not a good idea to install a large-scale facility to prevent the occurrence of such defects. The object of the present invention is to propose a method for laterally moving a rolling material that can prevent the occurrence of wrinkles generated in billets during such caliber rolling, and in particular, easily generates wrinkles using conventional equipment. The method of making a rolling raw material directly face a predetermined caliber is proposed.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present inventor considered a manipulator and how to use the cant claw for rotating the material attached thereto, and lifted one lower corner of the rolled material with the cant claw, and in that state It has been found that if the manipulator operating surface is pressed from both sides of the material, the other lower corner of the rolled material can be lifted from the manipulator operating surface and lifted from the roller table. The present invention utilizes this phenomenon to lift the rolled material with a manipulator and to move the rolled material to a predetermined position facing the caliber.
[0006]
Therefore, the lateral movement method of the rolled material in the caliber rolling according to the present invention includes the step of bringing the operating surface of the manipulator close to the rolled material on the roller table, and rotating the cant claw attached to the manipulator around the rotation axis. Lifting one bottom corner of the rolled material and pressing the diagonal corner of the rolled material against the manipulator operating surface, and pressing the manipulator operating surface against both sides of the rolled material to place the rolled material on a roller table A step of lifting and gripping from the roll, a step of laterally moving the rolled material to a predetermined position facing the caliber by the manipulator, a step of opening the manipulator at the predetermined position and returning the rolled material on the roller table; Are performed sequentially. At that time, it is preferable that the angle of the rolled material tilted by the cant claws is 0.8 to 2.4 °. As a result, the above-mentioned rising is performed reliably.
[0007]
Another method includes the step of bringing the operating surface of the manipulator close to the rolling material on the roller table, and rotating a cant claw attached to the manipulator around a rotation axis to form one bottom corner of the rolling material. And holding the rolling material by pressing the manipulator operating surface against both sides of the rolled material at the same time while further rotating the cant claw while pressing the diagonal corner of the rolled material against the manipulator operating surface, Lifting the rolling material from the roller table by a predetermined amount; moving the rolling material to a predetermined position facing the caliber by the manipulator; and opening the manipulator at the predetermined position to roll the rolling material. The step of returning to the table is performed sequentially. At this time, the rolling material angle inclined by the cant claw is preferably 0.8 to 2.4 °, as in the above method.
[0008]
In order to carry out the invention, a rolling material lateral movement device in caliber rolling comprising a manipulator disposed on a roller table and a cant claw attached to the manipulator is used, and the operation of the manipulator is used for this. Detecting that the rolling material has entered the area and moving the manipulator close to and stopping the rolling material, and moving the tip of the cant claw to the lower corner of the rolling material, and the lower corner of the rolling material by the cant claw The manipulator operating surface is pressed against both sides of the material to lift the rolled material from the roller table, and then the rolled material is lifted by the manipulator and the rolled material is directly opposed to the caliber. The manipulator and cant claw cooperative control means Ete and may be used made.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the overall configuration of a breakdown mill to which the present invention is applied, and FIG. 2 is a plan view showing the configuration of a rolling stock lateral movement apparatus according to the present invention. FIG. 3 is a cross-sectional view taken along the line AA in FIG.
[0010]
As shown in FIG. 1, the rolled material B is heated by a heating furnace (not shown) and then sized by reverse rolling with a block mill (only the caliber roll 13 is shown in FIG. 1). That is, the rolled material B is conveyed by the front roller table 10A having a large number of rollers 11A, passed through the caliber roll 13, and then conveyed in the reverse direction by the rear roller table 10B, and again passed through the caliber roll 13. Then, an operation of gradually reducing the cross section is performed.
[0011]
The front roller table 10A is provided with manipulators 12A and 12B, respectively. Further, one of the manipulators (12A in FIG. 2) is provided with a cant claw 15 on the front surface. As with the front roller table 10A, the manipulators 12C and 12D are also provided on the rear roller table 10B, and a cant claw 15 is provided on the front surface of one of them (12C in FIG. 2).
[0012]
As shown in FIG. 3, the cant claw 15 has a claw portion 16 at the tip of a bell crank 17 that rotates about the rotation shaft 19, and rotates about the rotation shaft 19 by the movement of the arm 18. The lower corner portion of the rolled material B can be lifted by 16 and further rotated by 90 °.
[0013]
As known in the art, a plurality of calibers whose sectional area gradually decreases are cut into the caliber roll 13, and when performing the reverse rolling, the rolling material B is sandwiched using the manipulator and the roller tables 10A, 10B. Move upside down to face the target caliber. In some cases, there is a step of rotating 90 ° with a cant claw.
[0014]
In the present invention, in the lateral movement, the manipulator and the cant claw are cooperatively operated as shown in FIG. First, when the rolling material B enters on the roller table 10A (step (a)), the rotation of the roller of the roller table 10A is stopped and the manipulators 12A and 12B are brought close to the rolling material B (step ( b)). In this case, the distance between the working surfaces of the manipulators 12A and 12B and the rolling material is preferably 5 to 15 mm.
[0015]
Next, the cantilever 15 attached to the manipulator 12A is operated to lift one bottom corner of the rolled material B to tilt the rolled material, and the diagonal corner of the rolled material is pressed against the manipulator operating surface S2 ( Step (c)). That is, the arm 18 of the cant claw 15 is appropriately operated to rotate the bell crank 17 and the lower corner portion of the rolled material B is lifted by the claw portion 16 attached to the tip thereof.
[0016]
In this case, the lifting angle is important, and if it is too small, the amount of auction caused by pressing the manipulator in the next process will not be sufficient, so it will not be possible to completely prevent wrinkles during lateral movement. If the lifting angle is too large, the rolled material cannot be auctioned even if the manipulator is pressed in the next process. In this sense, the lifting angle θ should be 0.8 to 2.4 °.
[0017]
As described above, the manipulators 12A and 12B are moved forward again in a state where one lower corner portion of the rolled material B is lifted by the cant claw 15. Thereby, the corner | angular part on the diagonal line side of the corner supported by the cant nail rises, As a result, the rolling raw material B can be lifted from a roller table. The bottom surface of the rolled material can be lifted 5 to 30 mm from the top surface of the roller 11 (step (d ′)).
[0018]
Next, in a state where the rolling material B is lifted from the roller table 10 by the cooperative action of the manipulator and the cant claw in this way, the manipulator 12 is moved laterally by its driving device (not shown), Move to a position facing the predetermined caliber (step (e)). In this way, when the rolled material B is completely aligned with the predetermined caliber, the cant claw 15 is returned to the original position, and the manipulators 12A and 12B are opened to return the rolled material B onto the roller table 10. Then start rolling again.
[0019]
In the above method, not only the bottom corner of the rolled material is lifted and the diagonal corner of the rolled material B is pressed against the manipulator operating surface S2, but the manipulator operating surface is simultaneously rolled while further rotating the cannula 15 By providing a step (step (d)) of pressing the rolled material against both sides of the material, the rolled material can be raised to an arbitrary height on the roller table 10. In this case, it is possible to prevent side-sliding wrinkles against unexpected rolling down of the rolled material. For example, when the rolled material has a cross section of 240 mm × 240 mm to 265 mm × 750 mm, it is preferable to secure a lift-up amount of 50 to 150 mm.
[0020]
The above operation can also be performed by manipulating the manipulator and cant claws manually. However, in order to perform the above operation reliably and quickly, it is preferable to control the manipulator and cant claw drive mechanism using a process computer, for example. The control means incorporated in such a control program is illustrated in FIG. These controls can be performed in a preset manner.
[0021]
【The invention's effect】
In the present invention, the rolled material is lifted from the roller table when facing the caliber so that it does not skid in contact with the conveying roller. For this reason, it was possible to completely prevent the occurrence of skid flaws in the rolled material, to reduce the number of correction work for the rolling flaws and to improve the quality of the final product such as a steel pipe.
[Brief description of the drawings]
FIG. 1 is a plan view showing the overall configuration of a breakdown mill to which the present invention is applied.
FIG. 2 is a plan view showing the configuration of a rolling stock lateral movement device according to the present invention.
3 is a cross-sectional view taken along a line AA in FIG.
FIG. 4 is a process explanatory diagram showing an implementation procedure of the present invention.
FIG. 5 is a control mechanism diagram of the rolling stock lateral movement device according to the present invention.
[Explanation of symbols]
10A, 10B: Roller table 11A, 11B: Rollers 12A-12D: Manipulator S1, S2: Manipulator operating surface 13: Caliber roll 15: Cant claw 16: Claw part 17: Bell crank 18: Arm 19: Rotating shaft (fulcrum) )

Claims (4)

Bringing the operating surface of the manipulator close to the rolling material on the roller table;
Rotating a cant claw attached to the manipulator around a rotation axis and lifting one bottom corner of the rolled material to press the diagonal corner of the rolled material against the manipulator operating surface;
Pressing the manipulator operating surface against both sides of the rolled material to lift and hold the rolled material from a roller table;
Laterally moving the rolled material to a predetermined position facing the caliber by the manipulator;
A method of laterally moving a rolled material in caliber rolling, comprising sequentially performing a step of opening the manipulator at the predetermined position and returning the rolled material onto a roller table. Bringing the operating surface of the manipulator close to the rolling material on the roller table;
Rotating a cant claw attached to the manipulator around a rotation axis and lifting one bottom corner of the rolled material to press the diagonal corner of the rolled material against the manipulator operating surface;
While further rotating the cant claw, simultaneously pressing the manipulator operating surface against both sides of the rolled material to grip the rolled material, and lifting the rolled material from the roller table by a predetermined amount;
Laterally moving the rolled material to a predetermined position facing the caliber by the manipulator;
A method of laterally moving a rolled material in caliber rolling, comprising sequentially performing a step of opening the manipulator at the predetermined position and returning the rolled material onto a roller table. The method for laterally moving a rolled material in caliber rolling according to claim 1 or 2, wherein the angle of the rolled material tilted by the cant claw is set to 0.8 to 2.4 °. A lateral movement device for a rolled material in caliber rolling comprising a manipulator disposed on a roller table and a cant claw attached to the manipulator,
The manipulator detects that the rolled material has entered the operating region of the manipulator, moves the manipulator close to and stops the rolled material, and moves the tip of the cant claw to the lower corner of the rolled material. The rolled material lower surface corner is lifted to a predetermined height and the manipulator operating surface is pressed against both sides of the material to lift the rolled material from the roller table, and then the rolled material is lifted by the manipulator to the caliber. A rolling raw material lateral movement device comprising a manipulator / cant claw cooperative control means for lateral movement to a predetermined position facing directly.

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