JP4850601B2 - Slab reversing device - Google Patents

Description

  The present invention relates to a slab reversing device, and more particularly to a device for reversing a steel slab that has been continuously cast and conveyed to a refining process, for example, 180 ° for flaw inspection.

In the slab refining process, the slab that has been subjected to the one-side wrinkle inspection is then turned 180 ° and the other face is subjected to the wrinkle inspection. A reversing device is used for the reversal. As a conventional reversing device, for example, as in Patent Document 1, a slab on a roller table is lifted from a conveying line from one end side in the width direction of the slab and retracted from a conveying line, and then the holding member is erected and then 180 °. There has been proposed a means for turning and returning to the roller table side in this state to tilt the gripping member and to reverse it. Further, as a roller table traveling type slab reversing machine, in Patent Document 2, two rotating frames equipped with a clamping device are connected, and these rotating frames are installed between roller tables for conveying a slab, and these slabs are attached to these rotating frames. A structure is disclosed in which the roller table is retracted out of the conveying line when reversing with the rotating frame.
Japanese Utility Model Publication No. 4-91929 No. 7-13843

However, any of the above conventional reversing devices requires a separate space from the slab conveyance line for retracting the gripping member or roller table, and there is a problem in installation space. In addition, in these conventional techniques, no consideration is given to the response to the slab warpage, and it may be difficult to reverse the slab depending on the degree of warpage.
In order to eliminate the installation space, the conveyance roller table itself at the reverse position is a pinch roll system, and the slab is sandwiched by this pinch roll and the roll itself is rotated in a plane perpendicular to the conveyance line. Although the technology to reverse the slab has been put into practical use, in order to pinch and reverse a slab weighing as much as 50 tons, a strong structure and a complicated mechanism are required for the roll itself and its peripheral devices. Countermeasures against slab warpage were not sufficient, and improvements in cost and operation were strongly desired.

  The present invention has been made in view of such circumstances, and can be reversed on the transport line without requiring an extra space for reversal, and is relatively simple and practical in terms of structure. It is an object of the present invention to provide a slab reversing device that can sufficiently cope with slab warpage.

The gist of the present invention for solving the above problems is as follows.
(1) A plurality of swivel rings through which the slab passes in the axial direction are arranged along the slab transfer line, and a first clamp that can move independently in the swivel ring radial direction at opposing positions in the swivel ring; A second stopper is provided, and a side stopper that contacts the side surface of the slab is provided on the inner surface of the swivel ring between the clamps so as to be movable in the radial direction of the swivel ring. When holding a horizontal slab between the first clamp and the second clamp of each swiveling ring, raise the clamp on the top side of the slab slightly so that no abnormal reaction force is generated on the swiveling rings. A slab reversing device characterized by that .
( 2 ) The slab inversion as described in (1) above , further comprising a mechanism for stopping the slab transported at a predetermined position so that the plurality of swiveling rings receive the slab load almost evenly. apparatus.
(3) (1) or a slab inverting device according to (2), characterized in that to perform flaw detection and removal of the slab both surfaces to defect detection and removal system of the slab finishing line step by serialized online Slab finishing equipment.

  According to the slab reversing device according to the present invention described above, a slab of any size can be stably and reliably reversed, and an extra space is required as in the prior art because the slab reversing device is reversed on the slab conveying line. There are no advantages. In addition, even if there is some warping in the slab, the reversing work can be performed without any trouble, and in addition, the main part of the device has a ring structure with a high degree of openness, so heat can be effectively dissipated from the slab, and the reversing device It also has the advantage that it does not need to have a special heat resistant structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing an example of a slab reversing device according to the present invention, and FIG. 2 is a diagram showing a specific example of one swivel ring shown in FIG. In the figure, 1 is a slab that is continuously cast, hot-cut, and sent to the refining process, 2 is a transport roll constituting a roller table for transporting the slab, and 3 is a regular interval between the transport rolls 2. There are three swiveling rings arranged, and these swiveling rings can be rotated in the direction around the axis, and are provided in the vicinity of the installation position of the wrinkle detection / removal device in the refining process. 4 is an elevating device for the swivel ring 3, 5a and 5b are first and second clamps for clamping the slab 1 from both sides, and the clamps 5a and 5b are attached to opposing positions on the inner surface of the swivel ring 3. The swivel ring 3 is swung and lifted up and down, and each can independently move in the radial direction of the swivel ring, and can be brought into contact with the upper and lower surfaces of the slab. Reference numeral 6 denotes a side stopper provided between the clamps 5a and 5b on the inner surface of the swivel ring 3. The side stopper 6 is also movable in the ring radial direction, and can be brought into contact with one side surface of the slab 1. I have to.

The swivel rings 3 all have the same structure, and in the example shown in the figure, three rings are shown. However, in some cases, two rings are sufficient, and of course, four or more may be used, but at least a plurality of rings are essential. The reason why a plurality of swiveling rings is used is that when the slab is sandwiched in the ring and swiveled, the load is almost evenly balanced in at least two points in the longitudinal direction of the slab. The slab stop position is changed accordingly, and the slab is stopped at the optimum position. For this reason, it is preferable that a mechanism for stopping the slab at a predetermined position is provided in the transport line according to the length of the slab to be transported (which may be set in advance or measured by a length measuring device). As the stop mechanism, for example, the detection device at the end of the slab may be stopped at a stop position determined by the slab length in conjunction with the driving device of the transport table.
FIG. 1 shows the members and mechanisms necessary only for the first swivel ring, and the other rings are omitted for convenience, but the other two rings have the same structure as the first ring. Needless to say.

As shown in FIG. 2, the swivel ring 3 allows the slab 1 to pass in the axial direction at substantially the center position thereof, but has an inner diameter sufficient for the assumed maximum slab width to pass and swivel. The first and second clamps 5a and 5b can be moved and adjusted in the radial direction of the ring by, for example, a hydraulic cylinder provided on the inner surface of the swivel ring 3, and the side stopper 6 is also a hydraulic cylinder provided on the swivel ring 3 in the same manner. It is possible to adjust the movement in the ring radius direction. As shown in the figure, the inner surface of the swivel ring 3 is provided with a clamp, a stopper, and a driving portion thereof, so that the inner surface of the ring needs to have a rigid structure. Further, the swiveling ring 3 is entirely held by the groove-type support frame 7. As a holding mode, the swiveling ring 3 is slidably held at both ends of the support frame 7, and the lower part of the support frame 7. The ring is held by two swivel rollers 8 provided on the inner surface.
The swivel roller 8 is in the form of a pinion gear having teeth on its peripheral surface, and meshes with a tooth portion 9 (FIG. 1) engraved on the peripheral surface of the swivel ring 3 to rotate by driving of a drive motor (not shown). Thus, the swivel ring 3 is swung by a predetermined angle in the arrow direction 10.

  The lifting device 4 includes, for example, a hydraulic cylinder 4a erected on the foundation and a cylinder rod 4b of the cylinder. Opposite ring sides at both ends of the support frame 7 are directly fixed to a rod 4b of a cylinder constituting the lifting device 4, and the support frame 7 is moved up and down in the direction of the arrow 11 by driving the cylinder 4a. Move up and down in the direction of arrow 12 over a certain range. All three swivel rings 3 juxtaposed along the transport line have the same structure, and their swiveling and raising / lowering operations are all synchronized. Also, the movement adjustment of clamps and side stoppers inside each swiveling ring It is the same.

  Of course, the swiveling means, the lifting means, the clamp and the side stopper moving means shown in the illustrated embodiment are not limited to the illustrated examples, and other known driving means can be adopted. In any case, when it is required to stop at a predetermined angle and position with high accuracy, such as turning angle, lift position, clamp and side stopper stop position, it is necessary to check with an electrical on / off means such as a limit switch or proximity switch. Combinations are possible.

  FIG. 4 shows an outline of the wrinkle detection / removal line in the slab finishing process incorporating the reversing device according to the present invention. As shown in the figure, a first wrinkle detection device 13 that detects and designates a surface flaw based on a slab image obtained by an image pickup device that picks up an image of the slab surface, and is detected and designated by the first wrinkle detection device. A first grinding device (for example, a hot grinder) 14 for grinding a flange portion on one surface side of the slab, a reversing device 15 for reversing the ground slab by 180 °, and a wrinkle on the other surface side of the slab after reversing A second wrinkle detection device 16 and a second grinding device 17 that perform grinding by detection and designation are arranged, and these are arranged on the same line by a conveyance table 18. By incorporating the reversing device 15 into the slab refining process in this manner, wrinkle detection and removal on both sides of the slab can be performed online. If the transport table 18 can be moved in the opposite direction and another wrinkle detecting device is provided between the first grinding device 14 and the reversing device 15, wrinkles on both sides of the slab are detected and removed with a short line. Is possible.

  Next, an actual slab reversing operation will be described using the illustrated apparatus. FIGS. 3A to 3K are schematic diagrams sequentially showing the slab reversing operation, and will be described below. As described above, in the normal refining process, the slab has completed the detection and removal of wrinkles on one surface (upper surface) before reaching the reversing device. Detects and removes wrinkles.

(A): The slab 1 to be reversed is transported and stopped at a predetermined position. Since there are various sizes (lengths) of the slab, the slab is stopped at an optimal position based on size information obtained in advance. This position is also a position at which the load burden of the three swiveling rings 3 is averaged. In this state, the swiveling ring 3 is in the lower limit position, the first clamp 5a and the second clamp 5b are in the horizontal initial position away from the slab upper and lower surfaces, and the side stopper 6 is also in the vertical initial position away from the slab side surface (right side in the figure). It is in.
(B): The second clamp 5b is raised, and its upper surface is brought into contact with or close to the lower surface of the slab. The second clamp is automatically stopped using a means such as a limit switch.
(C): The elevating device 4 is driven to raise the turning ring 3, the slab 1 is held by the second clamp 5 b, separated from the transport line, and raised to a predetermined upper limit position. The upper limit position is required to have a height that does not come into contact with the conveying roller when the slab turns 180 °, but this position is also controlled by a limit switch or the like.
(D): The first clamp 5a is lowered until the lower surface of the first clamp 5a contacts the upper surface of the slab, and the slab 1 is sandwiched between the first and second clamps 5a and 5b from above and below.
(E): The waiting side stopper 6 is moved to the ring center side and brought into contact with one side surface of the slab 1 (the right side surface of the slab in the figure). Since the slab is sandwiched between the first and second clamps, the slab does not shift when the side stopper 6 hits the side surface of the slab.
(F): The upper and lower surfaces of the slab 1 are sandwiched between the first and second clamps of the three swiveling rings 3, but if the swivel operation is performed with the clamps tightly sandwiching the slab, the slab 1 warps. If there is (usually warping), the turning center of each swiveling ring 3 and the center of the slab at the clamp position do not necessarily coincide with each other, and abnormal reaction force acts on the clamp, causing trouble in turning. Can be considered. For this reason, in order to prevent this abnormal reaction force, it is preferable that the first clamp 5a is slightly raised as shown in the figure to form a gap between the upper surface of the slab 1 and the lower surface of the first clamp 5a. Even if the slab 1 is warped due to the presence of the gap, the warp is absorbed by the gap during turning and the turning is performed smoothly.
(G): The swiveling ring 3 is swung clockwise to the 90 ° position (position where the slab width becomes vertical) by operating the swiveling device and stopped. During this last operation, the slab 1 turns with its load held by the second clamp 5b and the side stopper 6.
(H): The second clamp 5b is separated from the slab 1 at a position of 90 °, and the first clamp 5a is brought into contact with the slab 1.
(I): In this state, if the slab 1 is further rotated 90 ° clockwise by further rotating the swivel ring 3, the slab 1 is held by the first clamp 5a and the side stopper 6 and 180 degrees from the initial posture. ° It will be reversed.
(J): When the reversal is completed, the side stopper 6 is moved to the inner surface side of the ring and the side stopper 6 is separated from the slab 1.
(K): Finally, the entire rotating ring 3 is lowered by the lifting device 4 while lowering the first clamp 5a, and the slab 1 is placed on the conveyance line of the conveyance roll. Thereafter, the slab 1 is transported to detect and remove wrinkles on another surface.

  When the reversal and unloading of one slab is completed, the swiveling ring 3 remains in the state and waits for the next slab to be loaded. This time, the first clamp 5a is on the lower side, the second clamp 5b is on the upper side, and the side stopper 6 is on In the left-hand form, the next slab will be reversed counterclockwise.

It is a schematic perspective view which shows one Example of the slab inversion apparatus which concerns on this invention. It is a front view which shows the specific example of one turning ring of the inversion apparatus shown in FIG. (A)-(k) is a schematic diagram which shows each operation | movement of the inversion apparatus of this invention sequentially. It is the schematic which shows an example of the soot detection / removal line incorporating the inversion apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slab 2 Roller of conveyance table 3 Revolving ring 4 Elevating device 4a Hydraulic cylinder 4b Cylinder rod 5a 1st clamp 5b 2nd clamp 6 Side stopper 7 Support frame 8 Revolving roller 9 Ring tooth part 10 Revolving direction 11 Elevating direction of supporting frame 12 Ring lifting / lowering direction 13 First scissor detection device 14 First scissor grinding device 15 Reversing device 16 Second scissor detection device 17 Second scissor grinding device 18 Conveying table

Claims (3)

A plurality of swirl rings through which the slab passes in the axial direction are arranged along the slab conveying line, and a first clamp and a second clamp that are independently movable in the swivel ring radial direction at opposite positions in the swivel ring. A side stopper that contacts the side surface of the slab is provided on the inner surface of the swivel ring between the clamps so as to be movable in the radial direction of the swivel ring, and an elevating device for moving the swivel ring up and down and a swivel device are attached to the swivel ring. When holding the slab in a horizontal position with the first clamp and the second clamp of each swivel ring, raise the clamp on the top side of the slab slightly so that no abnormal reaction force is generated on the swivel rings. A slab reversing device. The slab reversing device according to claim 1, further comprising a mechanism for stopping the slab conveyed so that the plurality of swiveling rings receive the slab load almost uniformly at a predetermined position. A slab refining apparatus comprising: the slab reversing device according to claim 1 or 2 being continuously connected to a wrinkle detection / removal facility in a slab refining process so as to detect wrinkles on both surfaces of the slab online. .

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