JP3268231B2 - Coil box for hot rolling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil lifting / lowering apparatus applied to a coil box disposed between a rough rolling mill and a finishing rolling mill in a hot rolling facility.

[0002]

2. Description of the Related Art A coil box is arranged between a rough rolling mill and a finishing rolling mill of a hot rolling facility, and a rough rolled material (a strip-shaped plate material) from the rough rolling mill is wound into a coil in the coil box. After completion of the winding, the rolled material is transferred downstream while being opened and unwound, and supplied to the finishing mill, thereby preventing the temperature of the rough rolled material from lowering.

A conventional coil box will be described with reference to FIGS. 5 to 7. First, as shown in FIG. 5, a rough rolled material (strip-shaped plate material) 1 sent from a rough rolling mill is a table roller 2.
Is supplied to the coil box 6 while being guided by the guide roller 3 and is bent at a required curvature by the bending roll 4. It is wound up.

When the coil 5 has been wound up to a predetermined size, the wound coil 5 is opened and unwound, and the intermediate cradle rolls 13 to 14 and the output cradle roll 1 are wound.
The unrolled rough rolled material 1 moves like a dashed-dotted coil 5 on 5-16 and is conveyed to a pinch roll 8 on a table roller 7 on the downstream side. (Not shown).

[0005] In transferring the coil, the hydraulic cylinder 20 is raised to raise the upstream side of the roll support member 22, and at the same time, the hydraulic cylinder 23 is raised to receive the load of the coil 5 by the intermediate cradle roll 13, When the fluid pressure cylinder 23 is lowered while the pressure cylinder 20 is further raised, the coil 5 moves between the intermediate cradle rolls 13 and 14.

Then, as described above, the hydraulic cylinder 2
3 to 26, the coil 5 is moved up and down so that the coil 5 is transferred to the downstream side.
-14, the coil 5 is transferred to between the cradle rolls 15-16.

FIGS. 6 and 7 are schematic explanatory views showing a relationship between a coil of a heavy object and a cradle roll. FIG. 6 is a front view,
FIG. 7 is a side view.

The coil 5 of heavy material placed on the entrance cradle rolls 11 to 12 is rewound while being pulled downstream, and is transferred between the intermediate cradle rolls 13 to 14 and the exit cradle rolls 15 to 16. 6, when the outer peripheral surface of the roll and the outer peripheral surface of the coil 5 are slightly inclined, the heavy coil 5 may collide with the roll (see the solid arrow in FIG. 6). As shown in FIG. 7, the heavy coil 5 collides with the roll not from directly above the cradle roll but from a direction having an inclination angle from the vertical line (solid line in FIG. 7). Arrow)).

For this reason, a large horizontal and vertical impact force is applied to the roll, and an unbalance displacement occurs on the drive side and the work side of the roll.

[0010]

In the coil box of the conventional hot rolling equipment as described above, a heavy coil is used.
When being transported while being rewound on the cradle roll, the outer peripheral surface of the roll and the outer peripheral surface of the coil may collide with the roll in a slightly inclined state. Since the coil may collide with the roll from a direction with an inclination angle from the angle, the horizontal and vertical impact forces act on the roll, causing an unbalanced displacement on the drive side and the work side of the roll. In addition, due to the unbalance displacement, there is a problem that an excessive bending load is applied to the lifting / lowering device for supporting and raising / lowering the roll, and the lifting / lowering device is damaged.

The present invention solves the above-described disadvantages of the conventional apparatus, and a coil of a heavy object effectively absorbs an unbalance displacement caused by an impact force applied to both side supporting portions of the roll.
It is an object of the present invention to provide a coil box of a hot rolling facility capable of preventing trouble of a lifting device and stably rewinding and transferring a coil.

[0012]

In order to achieve this object, in the present invention, a rough rolled material rolled by a hot rough rolling mill is wound and wound on a coil on an entry cradle roll. A coil box that opens and retracts the coil, moves the cradle roll lifting device up and down to transfer the coil downstream, and supplies it to the finish rolling mill. A horizontal displacement absorbing means for absorbing a horizontal unbalance displacement orthogonal to the roll axis generated on the roll side support portion ; and a trunnion structure for absorbing a vertical unbalance displacement generated by the same impact force. The displacement absorbing means includes a rotatable spherical bush interposed therein, and the horizontal displacement absorbing means includes a roll. An outer support plate fixed to the lifting side,
An inner support plate rotatably mounted by the outer support plate and the pin, a connecting member rotatably mounted by interposing the inner support plate, the pin, and the spherical bush; Are connected to the piston rod of the elevating device, and the trunnion structure is rotatably supported below the elevating device by pins and bearings.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a coil box of a hot rolling facility according to the present invention will be described in detail with reference to the drawings using embodiments.

Embodiment [Configuration] FIG. 1 is a front view showing a mounted state of a roll and an elevating device, FIG. 2 is a partial side view of FIG. 1, FIG. 3 is a partially enlarged view of FIG. 2, and FIG. It is the elements on larger scale of FIG. The same parts as those of the conventional device described with reference to FIGS.

In the present invention, the mounting structure of the lifting device for lifting and supporting the cradle roll in the coil box is improved as compared with the conventional device shown in FIGS. A means for effectively absorbing the horizontal and vertical unbalance displacements generated in the horizontal direction.

Referring to the drawing, a heavy-weight coil 5 will be described.
As shown in FIG. 1, when the sheet is rewound and transferred while being pulled downstream on the cradle rolls 31 to 32 in the coil box, as shown in FIG. When the transfer is performed with the surface slightly inclined, the load of the coil 5 is applied from the direction of the arrow in the figure, and the drive side bearing 47 is provided on both sides of the cradle roll 31.
Then, an unbalanced vertical impact force acts on the work-side bearing 48.

As shown in FIG. 2, when the heavy coil 5 is transferred not from directly above the cradle roll 31 (or 32) but from a direction inclined from a vertical line,
The load of the coil 5 is applied from the direction of the arrow in the figure, and an unbalanced horizontal and vertical impact force acts on the drive-side bearing 47 and the work-side bearing 48 on both sides of the cradle roll 31 (or 32).

The means for absorbing the displacement generated by these impacts will be described with reference to FIGS. 1 to 4. Reference numerals 31 to 32 denote cradle rolls for rewinding and transferring the heavy coil 5.
Both ends are supported by a drive-side bearing 47 and a work-side bearing 48.

Reference numerals 33 to 34 denote cradle rolls 31 to 32.
A hydraulic cylinder of an elevating device for elevating the elevating device; 35, a guide for guiding and supporting a horizontal beam 36 elevating and lowering by the elevating device; A horizontal beam 37 that supports the work-side bearing 48 is a frame that supports the hydraulic cylinder 33 (or 34) of the lifting device.

38 is a hydraulic cylinder 33 (or 34)
A connecting member 39 is connected to the tip of the piston rod. Reference numeral 40 denotes a cylinder support bearing for rotatingly supporting a pin 49 fixed to a lower portion of the fluid pressure cylinder 33 (or 34), and is fixed to the frame 37 to have a trunnion structure.

Reference numeral 41 denotes a drive-side bearing 47 and a work-side bearing 4
8, a bearing stand fixed to the horizontal beam 36, a bell crank-shaped outer support plate 42 having an upper part fixed to the horizontal beam 36 and a pin 44 mounted at the lower part, and 43 a pin at the lower part 44 and a pin 45 on the upper part.
Is a spherical bush which is interposed above the connecting member 39 and supports the pin 45 on a spherical surface.

These outer support plate 42 and inner support plate 4
3, pin 44, pin 45, spherical bush 46, connecting member 3
9 constitutes the horizontal displacement absorbing means 50.

The elevating device comprises horizontal displacement absorbing means 50,
Piston rod 38, fluid pressure cylinder 33 (or 3
4), constituted by a cylinder support bearing 40 and the like.

Other configurations are substantially the same as those of the conventional apparatus shown in FIGS. The hydraulic cylinder 33 (or 34) of the elevating device may be a mechanical moving means or a driving means such as a driving motor in addition to hydraulic pressure such as hydraulic pressure or pneumatic pressure.

[Operation and Effect] According to the coil box of the hot rolling equipment of the present embodiment, when the rough rolled material rolled by the hot rough rolling mill is supplied into the coil box, it is bent at a required curvature. Is wound on the coil 5 on the entry cradle roll. After the winding of the coil 5 of a predetermined size is completed, the coil 5 is pulled open and moved downstream while being rewound, and the coil 5 is transferred to the intermediate roll and the output cradle roll, and the coil 5 is moved. The unrolled rough rolled material is supplied to the downstream finishing mill as described with reference to FIG.

When the heavy coil 5 collides with the cradle roll 31 (or 32) in an inclined state during the unwinding transfer of the coil 5, the collision causes a large impact force in the horizontal and vertical directions. Acts on the drive side and the work side of the cradle roll 31 (or 32), resulting in unbalanced displacement in the horizontal and vertical directions, as described with reference to FIGS.

However, according to this embodiment, the horizontal impact force is applied to the bearing 47 (or 48) for supporting the cradle roll 31 (or 32), the bearing stand 41, and the horizontal beam 3
When the horizontal displacement absorbing means 50 is transmitted to the horizontal displacement absorbing means 50 through 6, the horizontal displacement absorbing means 50 is pressed in the direction of the arrow in FIG. 3 and moves as shown by a virtual line (two-dot chain line). At this time, when the outer support plate 42 moves rightward in the drawing, the inner support plate 43 connected by the pin 44 is swung in the virtual line direction together with the outer support plate 42 with the upper pin 45 as a pivot point. Become.

Therefore, when a horizontal impact force acts,
The inner support plate 43 swings with the pin 45 on which the spherical bush 46 is interposed as a rotation fulcrum, and the outer support plate 42 connected by the pin 44 is moved to absorb the displacement due to the impact force.

The bearing 47 (or 48) for supporting the cradle roll 31 (or 32) with a vertical impact force,
Bearing stand 41, horizontal beam 36, horizontal displacement absorbing means 50,
When transmitted to the hydraulic cylinder 33 via the connecting member 39 and the piston rod 38, these lifting devices are pressed in the direction of the arrow in FIG. 4 and move as indicated by the phantom line (two-dot chain line). At this time, the lifting / lowering device is swung in the direction of the imaginary line arrow on the right side of the drawing with the cylinder support bearing 40 attached to the fluid pressure cylinder 33 as a pivot point.

On the other hand, when a vertical impact force is applied to the opposite side of the cradle roll 31 (or 32), it is swung to the left in the drawing.

As described above, when the vertical impact force acts, the lifting device can effectively absorb the displacement due to the impact force by the spherical bush 46 disposed at the upper part and the trunnion structure disposed at the lower part.

As described above, the impact force acts on the cradle roll 31 (or 32) in the horizontal direction and the vertical direction, and unbalanced displacement in the horizontal direction and the vertical direction occurs on both sides of the cradle roll 31 (or 32). Even so, the horizontal displacement absorbing means 50 arranged at the upper part of the elevating device, the trunnion structure arranged at the lower part, and the spherical bush 46 interposed in the horizontal displacement absorbing means 50 operate in cooperation with each other, thereby The unbalance displacement in the vertical direction can be absorbed.

It should be noted that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the spirit of the present invention.

[0034]

In summary, according to the coil box of the hot rolling equipment of the present invention, the rough rolled material rolled by the hot rough rolling mill is wound and wound on the coil on the entrance cradle roll. A coil box that opens and retracts the coil, raises and lowers the cradle roll lifting device to transfer the coil downstream, and supplies it to the finishing mill, where the cradle is impacted by the impact of the coil on the cradle roll during coil transfer. A horizontal displacement absorbing means for absorbing a horizontal unbalance displacement orthogonal to the roll axis generated at the roll side support portion ; and a trunnion structure for absorbing a vertical unbalance displacement generated by the impact force, wherein the horizontal Since the rotation absorbing spherical bush is interposed inside the displacement absorbing means, the driving side of the cradle roll and Can effectively absorb unbalanced displacement that occurs over click side, unbalanced bending load acts is reduced to the lifting device, trouble such as a failure can be prevented.

The horizontal displacement absorbing means includes an outer support plate fixed to the roll support side, an inner support plate rotatably mounted on the outer support plate and the pin, and an inner support plate and a pin. A connecting member rotatably mounted by interposing a spherical bush, and the connecting member is connected to a piston rod of an elevating device, and the trunnion structure is provided with a pin below the elevating device. And the bearing can be rotatably supported by a bearing, so that even if an impulsive force acts in the horizontal and vertical directions and an unbalanced displacement occurs, the horizontal displacement absorbing means and the lower The trunnion structure and the spherical bush interposed in the horizontal force absorbing means operate in cooperation with each other to effectively absorb the horizontal and vertical unbalance displacements.

As described above, according to the present invention, the unbalance displacement generated on the drive side and the work side of the cradle roll can be effectively absorbed, so that the lifting / lowering device operates smoothly and the coil is rewound stably. This is an effect that can be transferred.

[Brief description of the drawings]

FIG. 1 is a front view showing a mounted state of a roll and an elevating device according to an embodiment of the present invention.

FIG. 2 is a partial side view of FIG.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a partially enlarged view of FIG. 1;

FIG. 5 is a schematic side view of a conventional coil box.

FIG. 6 is an explanatory diagram showing a relationship between a conventional coil and a roll.

FIG. 7 is a side view of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rough rolled material (strip-shaped plate material) 5 Coil 6 Coil box 31 Cradle roll 32 Cradle roll 33 Fluid pressure cylinder 34 Fluid pressure cylinder 35 Guide 36 Horizontal beam 37 Frame 38 Piston rod 39 Connecting material 40 Cylinder support bearing 41 Bearing stand 42 Outside support Plate 43 Inner support plate 44 Pin 45 Pin 46 Spherical bush 47 Drive side bearing 48 Work side bearing 49 Pin 50 Horizontal displacement absorbing means

Claims (2)

(57) [Claims] 1. A rough rolled material rolled by a hot rough rolling mill is wound on a coil on an entry cradle roll, and the cradle roll elevating device is moved up and down while opening and rewinding the wound coil. is allowed to transfer the coil to the downstream, a coil box supplied to the finishing mill, rows coil during coil transfer occurs cradle roll sides supporting portion by the impact forces impinging on the cradle roll
A horizontal displacement absorbing means for absorbing a horizontal displacement perpendicular to the axis, and a trunnion structure for absorbing a vertical imbalance displacement generated by the same impact force. The horizontal displacement absorbing means is rotatable inside the horizontal displacement absorbing means. A coil box for hot rolling equipment, wherein a spherical bush is interposed. 2. An outer supporting plate fixed to a roll supporting side, an inner supporting plate rotatably mounted on the outer supporting plate and a pin, and an inner supporting plate and a pin fixed to the roll supporting side. A connecting member rotatably mounted by interposing a spherical bush, and the connecting member is connected to a piston rod of an elevating device, and the trunnion structure is provided with a pin below the elevating device. The coil box for hot rolling equipment according to claim 1, wherein the coil box is configured to be rotatably supported by a bearing and a bearing.