JPH055564B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for reversing a steel billet on a conveying roller table.

(Conventional technology) Surface defects such as cracks and sludge defects that occur during the steelmaking stage and during blooming and rolling have a large impact on the quality of steel slabs, and removal of these defects is an important issue in terms of quality control. . Therefore, a flaw detector installed on the flaw detection line detects surface flaws on the steel billet in advance, and then the steel billet is loaded into the flaw removal line, and the steel billet is longitudinally removed by the conveyance rollers of this flaw removal line. While the steel pieces are being conveyed in this direction, surface flaws on the steel pieces are removed using a flaw removing machine.

By the way, in a type of flaw removal machine that can only remove flaws from the top surface of a steel piece, there is no problem if the flaw removal work only needs to be performed from the top surface.
If it is necessary to remove defects on the bottom surface,
After the steel piece was turned over, the flaw removal work was performed again using the flaw removal machine.

As such a steel billet reversing device, for example,
The one described in Japanese Patent No. 55-148871 is known.

This conventional steel billet reversing device has a rotatable cylindrical middle frame equipped with a movable clamper that holds the steel billet from the top, bottom, left and right directions, and a lifting device disposed on the outer frame of the middle frame. It was supported so that it could be raised and lowered freely.

(Problem to be Solved by the Invention) The conventional steel billet reversing device is provided with a plurality of cylindrical middle frames that clamp the steel billet over the entire length of the steel billet, and the movable clamper of each middle frame is used to clamp the steel billet. Since the steel piece is clamped and multiple cylindrical inner frames are rotated simultaneously to turn the steel piece around, if the steel piece has a bend or warp, the center of rotation of the steel piece will be There was a problem that it could not be rotated smoothly because it was partially eccentric.

Furthermore, the clamper has a complicated structure because it holds the steel piece at four locations: top, bottom, left, and right. Furthermore, if the clampers are not driven in synchronization, the clamps will be gripped eccentrically, but it is difficult to synchronize these four clampers.

Furthermore, in conventional systems, unless multiple cylindrical middle frames are raised and lowered by the same amount in synchronization, the center of rotation becomes partially eccentric and smooth reversal cannot be obtained. The problem was extremely difficult.
If the cylindrical inner frames were integrally connected in order to achieve synchronization, there were problems such as an increase in the size of the device.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method and apparatus for reversing a steel billet which eliminates the above-mentioned conventional drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention takes the following measures.

That is, the feature of the method for reversing a steel billet of the present invention is that the billet is placed on a conveying roller table that conveys the billet in its longitudinal direction so that the cross-sectional shape is approximately square and one of the cross-sectional diagonals is perpendicular. A pair of V-shaped clamps that have a rotation center of a horizontal axis parallel to the conveyance direction of the steel piece above the intersection of the diagonal lines of the cross section of the steel piece, and that move toward and away from the rotation center synchronously. By holding one end of the steel piece on the conveyance roller table with the claws from the diagonal direction of its cross section, the one end side of the steel piece is lifted above the conveyance roller table, and the side parallel to the conveyance direction is Rotatable around the axis,
In addition, by supporting the lower surface side of the other end of the steel slab in a free state by a pair of support rollers disposed on both left and right sides of the conveyance center line, the other end side of the steel slab is supported in a free state. The steel billet is supported by floating above the conveyance roller table, and the pair of clamp claws are rotated about the rotation center to reverse the steel piece about the horizontal axis under the guidance of the pair of servo rollers. .

Further, the feature of the steel billet reversing device of the present invention is that the steel billet is placed on a conveying roller table that conveys the billet in its longitudinal direction so that the cross-sectional shape is approximately square and one cross-sectional diagonal line is perpendicular. A pair of V-shaped clamps that have a rotation center of a horizontal axis parallel to the conveyance direction of the steel piece above the intersection of the diagonal lines of the cross section of the steel piece, and that move toward and away from the rotation center synchronously. a reversing machine comprising: a clamp mechanism that clamps one end of the steel piece on the conveying roller table from the diagonal direction of the cross section with claws; and a reversing mechanism that rotates the clamp mechanism around the rotation center; In order to support the lower surface side of the other end of the steel piece in a free state, it is rotatably supported around a horizontal axis parallel to the conveyance direction, and is arranged on both left and right sides of the conveyance center line. The present invention includes a reversing support machine equipped with a pair of support rollers that are supported so as to be able to rise and fall freely.

(Function) According to the present invention, one end of the steel piece on the conveying roller table is gripped by the clamp claw. This clamp claw is V-shaped and approaches the steel piece from the diagonal direction of the steel piece with a substantially square cross section and grips the steel piece, so the steel piece is automatically centered at the rotation center position. . Since the center of rotation is located above the intersection of the diagonal lines of the cross section of the steel piece on the conveyance roller table, by grasping the steel piece with the clamp claw, one end of the steel piece is lifted above the conveyance roller table. It will be done.

At the same time, the support roller on the other end of the steel piece rises, and the other end of the steel piece is supported on the support roller and lifted above the conveyance roller table.

Then, by rotating the clamp claw around its rotation center, the piece of steel gripped by the clamp claw is reversed. At this time, the clamp claw is V-shaped,
Since the steel piece is supported diagonally, even if the clamp claw rotates around the rotation center, the steel piece will not come off the clamp claw, allowing reliable clamping.

Furthermore, even if the axis of the steel billet is bent or warped, the other end of the steel billet is simply placed on the support roller, so the billet can be freely reversed on the support roller. This allows for smooth reversal.

(Embodiment) Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 shows a flaw removal line 1, and a reversing support machine 3, a reversing machine 4, a steel billet flaw removal machine 5, and an inversion support machine 3 are sequentially provided. The reversing machine 4 and the reversing support machine 3 constitute a billet reversing device.

As shown in FIG. 2, the flaw removing machine 5 includes a driving roller 7, a driven roller 8, a flaw removing cutter 9, and the like. The drive roller 7 and the driven roller 8 are supported by a movable frame (not shown).

The drive roller 7 can be driven in forward and reverse directions by a motor, and the steel piece 10 is held by the drive roller 7 and the driven roller 8 and travels by the drive of the drive roller 7. There are four defect removing cutters 9 in front, back, left and right corresponding to the upper two adjacent steel surfaces of the steel billet 10, and each of them is supported by a spindle unit 11 and is connected to It is driven by a motor 13. The flaw removal cutter 9 is controlled by a servo device (not shown) according to the flaw removal schedule on the steel piece surface, and operates in the width direction of the steel piece side and the cutting depth direction to remove surface flaws on the steel piece 10. It is composed of

As shown in FIGS. 1 and 3, the conveyance roller table 2 has V rollers 15 rotatably supported on a pedestal 14 and having V-shaped grooves at appropriate intervals in the conveyance direction. Chain sprockets 16 of each V roller 15 are interlocked and connected via a chain. In addition, instead of V roller 15,
The flat rollers may be arranged in a V-shape.

As shown in FIGS. 4 to 6, the reversing machine 4 includes a support frame 17 and a support frame 17.
a turntable 18 rotatably supported by;
The turntable 18 includes a clamp mechanism 19 provided on the front side thereof and an inversion mechanism 20 for inverting the turntable 18 around the horizontal axis. The turntable 18 is rotatably supported by a bearing ring 21 attached to the support frame 17 via a ball bearing 22, and includes a concentric ring gear 23, an intermediate gear 24 meshing with the ring gear 23, and an intermediate gear 24 that meshes with the ring gear 23. It is rotationally driven by a motor 26 via a drive gear 25 that meshes with an intermediate gear 24 . In addition, the motor 26 has a coupling ring 27.
The drive gear 25 is connected to a reduction gear 28 via a shaft end of the reduction gear 28 . Further, an electromagnetic brake 29 is provided at the other end of the shaft of the motor 26. And motor 26, reducer 2
8. The drive gear 25, the intermediate gear 24, and the ring gear 23 constitute a reversing mechanism 20 that reversely drives the turntable 18 in forward and reverse directions. Further, a rotary cam switch 30 is attached to the other end of the support shaft of the intermediate gear 24, so that the reverse position of the turntable 18 can be detected at ±90° and 180°.

The clamp mechanism 19 includes a pair of guide rails 31 provided oppositely to each other on the front surface of the turntable 18.
, a pair of upper and lower slide bodies 32 and 33 that are slidably provided vertically facing each other along the guide rail 31, and an equalizer that slides both slide bodies 32 and 33 synchronously in the far and near directions. Mechanism 34
It is equipped with The slide bodies 32 and 33 have clamp claws 35 and 36 and guide plates 37 and 3, respectively.
It has 8. The equalizer mechanism 34 includes a pair of rotating arms 39 rotatably supported on both sides of the turntable 18, and a pair of connecting levers that pivotally connect each rotating arm 39 and each slide body 32, 33, respectively. 40 and both slide bodies 32, 33
A pair of hydraulic cylinders 41 are connected to each other between both sides of the slide body 32 and 33, and the slide bodies 32 and 33 are moved toward and away from each other by the expansion and contraction operations of both the hydraulic cylinders 41. Note that the hydraulic cylinder 41 is appropriately equipped with a hydraulic control device so that a clamping force of more than a predetermined level does not act on the clamp claws 35 and 36. At this time, the rotating arms 39 and the connecting levers 40 on both sides
The equalizer mechanism 34 allows sliding operations to be performed synchronously with each other. 42 is slide body 3
This is a limit switch that senses the amount of sliding of parts 2 and 33.

As shown in FIGS. 7 and 8, the inversion support machine 3 includes a framed support frame 43, a pair of guide rails 44 provided opposite to each other on both sides of the support frame 43, and both guide rails 44. It is equipped with a slide table 46 that can move up and down under the rolling of a guide roller 45, and a hydraulic cylinder 47 that operates the slide table 46 up and down. A large-diameter support roller 48 and a pair of small-diameter auxiliary rollers 49 for keeping the steel slab 10 steady are provided above each of the support rollers 48 so as to be rotatable around a horizontal axis. The slide base 46 is moved up and down by the expansion and contraction operation of the hydraulic cylinder 47. 50 is a limit switch for detecting the rise of the slide table 46, and 51 is a limit switch for detecting the fall of the slide table 46.

Next, the operation of the above configuration will be explained. Normally, the slide table 46 of the reversing support machine 3 is lowered, and is in a position where it does not interfere with the steel piece 10. Further, both slide bodies 32 and 33 of the reversing machine 4 are also positioned far apart from each other. When performing the flaw removal work on only the upper surface of the steel billet 10, the steel billet 10 may be transported on the conveying roller table 2 without being reversed in any way, and the flaw removal work may be performed by the flaw removal machine 5. . Next, when performing flaw removal work on both the upper and lower surfaces of the steel piece 10, first remove the flaws on the upper surface, then operate the hydraulic cylinder 41 of the clamp mechanism 19 of the reversing machine 4, and remove the opposing clamp claws 35, 36.
The steel piece 10 is grasped with its rear end side in the conveying direction floating above the conveying roller table 2. When the steel piece 10 is gripped by the clamp claws 35 and 36, since the equalizer mechanism 34 is provided, both the slide bodies 32 and 33 are operated synchronously, and therefore the clamp claws 35 and 36 synchronously approach each other. be done. Further, since the guide plates 37 and 38 are provided, the gripping action by the clamp claws 35 and 36 can be performed more smoothly and reliably. On the other hand, the hydraulic cylinder 47 of the reversing support machine 3 on the front side in the conveyance direction is also activated, and the slide table 46 rises, as shown in FIG.
The steel piece 10 is supported on a pair of support rollers 48 with its front end side in the conveying direction floating above the conveying roller table 2 . Therefore, the entire steel piece 10 is suspended above the conveying roller table 2 by the reversing machine 4 and the reversing support machine 3. Next, when the motor 26 is driven and the turntable 18 is turned around the horizontal axis by a desired angle (for example, 180° or 90°) by the turning mechanism 20, the clamp mechanism 19 is turned over integrally with the turntable 18. ,
At this point, the steel billet 10 is turned over. When the steel billet 10 is reversed, since the front end side of the steel billet 10 is supported by the support roller 48 which is rotatable around the horizontal axis, the support roller 48 is also appropriately reversed, and therefore each V of the conveyance roller table 2 is The steel billet 10 can be easily and smoothly reversed without interfering with the roller 15, and scratches when the steel billet 10 is reversed can be effectively prevented. Furthermore, even if the steel billet 10 falls horizontally, vertically, and vertically on the support roller 48 when the steel billet 10 is reversed, each auxiliary roller 49 restricts the movement of the steel billet 10, and the auxiliary rollers 49 The steel piece 10 is smoothly reversed by rolling, and from this point as well, the steel piece 10 can be prevented from being scratched. In addition, when performing flaw removal work only on the lower surface of the steel billet 10, the steel strip
After suitably inverting 0, the flaw removing operation may be performed using the flaw removing machine 5. As described above, it is only necessary to appropriately install the reversing support machine 3 and the reversing machine 4 between the conveyance roller tables 2 in the defect removing line 1, and the apparatus can be provided at a relatively low cost.

In the above embodiment, a steel billet reversing device is provided in the flaw removal line 1 to invert the steel billet 10, but a structure in which a steel billet reversing device is provided in the flaw detection line may also be used. but not limited to.

(Effects of the Invention) According to the present invention, one end of a steel piece is forcibly gripped,
Since the other end is supported by support rollers in a free state and reversed, smooth reversal can be performed even if the steel piece is bent compared to a case where both ends are restrained.

In addition, the clamp claws are V-shaped and grip the steel piece from the diagonal direction of the cross section of the steel piece, so a pair of clamp claws is sufficient, making the clamping mechanism simpler than the conventional clamping mechanism that has four clampers. . Furthermore, the center of rotation of the clamp claw is located above the intersection of the diagonal lines of the cross section of the steel piece on the conveyor roller table, so simply by clamping the steel piece with the clamp claw, the steel piece can be moved above the conveyor roller table. Can be lifted. During this lifting, the pair of clamp claws approach each other synchronously, so that the lifting position of the steel piece can be automatically centered.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a side view of a defect removal line, and FIG. 2 being a perspective view of essential parts of a defect removal machine.
Figure 3 is a cross-sectional view taken along the line taken from Figure 1, Figure 4 is a front view of the reversing machine, Figure 5 is a side view of the same, and Figure 6 is a cross-sectional view of the reversing machine.
Figure 7 is a front view of the inversion support machine;
The figure is a side view of the same. 2... Conveyance roller table, 3... Inversion support machine, 4... Inversion machine, 10... Steel piece, 19... Clamp mechanism, 20... Inversion mechanism, 35, 36... Clamp claw, 48... Support Roller, 49...Auxiliary roller.

Claims (1)

[Claims] 1. A cross-section of a steel billet 10 placed on a conveying roller table 2 that conveys the steel billet 10 in its longitudinal direction so that its cross-sectional shape is approximately square and one cross-sectional diagonal is perpendicular. A pair of V-shaped clamp claws 35 and 36, which have a rotation center on a horizontal axis parallel to the billet conveying direction above the diagonal intersection, and move toward and away from the rotation center synchronously, By holding one end of the steel piece 10 on the conveyance roller table 2 from the diagonal direction of its cross section, the one end side of the steel piece 10 is lifted above the conveyance roller table 2, and the side parallel to the conveyance direction is lifted. Rotatable around the horizontal axis,
In addition, a pair of support rollers 48, 48 disposed on both left and right sides of the conveyance center line,
By supporting the lower surface side of the other end of the steel piece 10 in a free state, the other end side of the steel piece 10 is supported floating above the conveyance roller table 2, and the pair of clamp claws 35, 36 A method for reversing a steel billet, characterized in that the steel billet 10 is rotated about the rotation center to flip the steel billet 10 around a horizontal axis under the guidance of the pair of servo rollers 48, 48. 2. A position above the intersection of the cross-sectional diagonals of the steel billet 10, which is placed on the conveying roller table 2 that conveys the steel billet 10 in its longitudinal direction so that the cross-sectional shape is approximately square and one cross-sectional diagonal line is vertical. A pair of V-shaped clamp claws 35 and 36, which have a rotation center on a horizontal axis parallel to the conveyance direction of the steel billet and move toward and away from the rotation center synchronously, A clamp mechanism 19 that clamps one end of the steel piece 10 from the diagonal direction of its cross section.
and a reversing mechanism 20 for rotating the clamp mechanism 19 around the rotation center; A reversing support machine 3 equipped with a pair of support rollers 48, 48, which are rotatably supported around a horizontal axis parallel to the , are disposed on both left and right sides of the conveyance center line, and are supported so as to be able to rise and fall; A billet reversing device characterized by comprising: