JPH05179338A - Slab transporting device - Google Patents

Abstract

PURPOSE:To decrease the influence on a slab thickness and shape accuracy as far as possible. CONSTITUTION:This device has stationary skids 2 on which slabs 2 are placed, movable walking beams 1 on which the slabs are placed, a vertical moving means for vertically moving these walking beams back and forth, a forward and backward moving means which moves the walking beams forward and backward in the transporting direction of the slabs, a transverse direction moving means 10 which moves the walking beam horizontally back and forth in the transverse direction perpendicular to the transporting direction of the slabs and control means for controlling the vertical moving means, the forward and backward moving means and the transverse direction moving means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab transfer device for transferring a slab heated by a heating furnace facility.

[0002]

2. Description of the Related Art A side view of a conventional slab conveyor is shown in FIG.
A perspective view is shown in FIG. This slab transfer device comprises a walking beam 1, a skid 2, and a vertical movement means 3
And a forward / backward movement means 7 and a control means (not shown). The vertical movement means 3 includes a drive device 4 and a gear device 5.
And a plurality of eccentric wheels 6, the walking beam 1 is reciprocated in the vertical direction (y-axis direction in FIG. 4). The drive device 4 is composed of, for example, an electric motor, and transmits its rotational driving force to the plurality of eccentric wheels 6 via the gear device 5. The forward / backward movement means 7 includes a drive device 8 including, for example, an electric motor, and a rack.
Walking beam 1 composed of pinion mechanism 9
Is moved back and forth in the slab conveyance direction (x-axis direction in FIG. 4).

The vertical movement means 3 and the forward / backward movement means 7 are controlled by the above-mentioned control means, whereby the walking beam 1 is moved up, forward, down, and backward 1 times.
Performs a cycled operation. The skid 2 is installed and fixed so that the uppermost surface (the surface on which the slab 20 is placed) is at a height between the rising limit and the falling limit of the walking beam 1.

Next, the operation of the slab transfer device will be described. The slab 20 heated by the heating furnace and placed on the skid 2 is placed on the walking beam 1 by the ascending operation of the walking beam 1. The forward movement of the walking beam 1 causes the slab 20 to be conveyed forward by a predetermined distance, and then the lowering operation of the walking beam 1 places the slab 20 on the skid 2 again. After that, the walking beam 1 retreats and returns to its original position. As a result, the slab is transported forward (in the x-axis direction in FIG. 4) by the cycle operation of the walking beam 1.

[0005]

In such a slab transfer device, the skid 2 is fixed, and the walking beam 1 only moves up and down when viewed from the transfer direction of the slab 20, but in the lateral direction (z in FIG. 4). Does not work in the axial direction).
Therefore, the walking beam 1 and the skid 2 are always in the same portion 25 of the slab 20 during the operation cycle for transport.
(It is also called a skid mark in the shaded area in FIG. 4). For this reason, the skid mark 25 is deprived of heat by the walking beam 1 and the skid 2, and the temperature thereof is lower than that of other portions, as shown in FIG. For example, if the time during which the slab 20 is placed on the skid 2 or the walking beam 1 is 5 minutes between the time when the slab 20 is charged into the heating furnace and the time when the slab 20 is extracted,
The temperature of the skid mark 25 decreases by 30 to 40 ° C. with respect to the extraction temperature of 1170 ° C.

Such a temperature drop of the skid mark 25 affects the plate thickness accuracy and shape accuracy of the slab 20 when the slab 20 is extracted from the heating furnace and rolled by the hot rolling equipment, and the temperature of the skid mark 25 is reduced. There is a problem that the plate thickness becomes thicker than the target plate thickness.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a slab transfer device that does not affect the plate thickness and the shape accuracy as much as possible.

[0008]

A slab conveyor according to the present invention comprises a fixed skid on which the slab is mounted, a movable walking beam on which the slab is mounted, and vertical movement means for vertically reciprocating the walking beam. A forward-backward movement means for moving the walking beam forward and backward in the conveying direction of the slab; a lateral movement means for horizontally reciprocating the walking beam in a lateral direction perpendicular to the conveying direction of the slab; and the vertical movement. Means, a forward-backward movement means, and a control means for controlling the lateral movement means.

[0009]

The slab transfer device of the present invention thus constructed is constructed by newly providing the lateral movement means to the conventional device. When the slab is transported by the walking beam, the walking beam is moved laterally by a predetermined distance by the lateral movement means after the walking beam is moved forward, and then the walking beam is lowered to place the slab on the skid. Then, after the walking beam is moved backward, the walking beam is moved in the direction opposite to the forward direction by the lateral movement means to return the walking beam to the original position. By performing such an operation cycle, it becomes possible to make the surface of the slab which comes into contact with the skid and the walking beam different for each operation cycle. As a result, the temperature drop of the skid mark portion can be reduced, and the influence on the plate thickness and the shape accuracy can be reduced as much as possible.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of the slab conveyor according to the present invention. The slab transfer device of this embodiment is shown in FIG.
In the conventional slab transfer device shown in FIG. 1, the lateral movement means 10 is newly provided. This lateral movement means 1
Reference numeral 0 has a drive device 11 including, for example, an electric motor, and a rack and pinion mechanism 12, and horizontally reciprocates the walking beam 1 in a lateral direction (z-axis direction in FIG. 4) perpendicular to the transport direction of the slab 20. Exercise (see Figure 2). This horizontal reciprocating motion is performed by changing the rotary motion of the electric motor 11 into a horizontal reciprocating motion by the rack and pinion mechanism 12.

The vertical movement means 3, the forward / backward movement means 7,
The lateral moving means 10 is controlled by a control means (not shown), whereby the walking beam 1 carries out an operation in which one cycle includes ascending, advancing, lateral moving (+), descending, retracting, and lateral moving (-). The skid 2 is installed and fixed so that its uppermost surface (the surface on which the slab 20 is placed) is at a height between the rising limit and the falling limit of the walking beam 1 as in the conventional case.

Next, the operation of this embodiment will be described. A slab 20 heated by a heating furnace and placed on the skid 2
Is placed on the walking beam 1 by the raising motion of the walking beam 1. And walking beam 1
The slab 20 is transported forward by a predetermined distance by the forward movement operation. After the carrying operation, the walking beam 1 on which the slab is placed is moved by the lateral movement means 10 in the lateral direction (+ direction) by a predetermined distance (for example, the width of the contact surface between one walking beam 1 and the slab 20). , Move.
After that, the walking beam 1 is lowered by the vertical movement means 3 so that the slab 20 is placed on the skid 2 again. After that, the walking beam 1 is moved backward by the forward / backward movement means 7. Then, after that, the walking beam 1 is returned to the original position by moving the walking beam 1 in the direction (-direction) opposite to the front by the lateral movement means 10.

By performing such an operation as a cycle, the surface of the slab 20 contacting the skid 2 can be made different before and after the cycle, and it becomes possible to prevent the temperature of the skid mark from decreasing. The influence on the thickness and shape accuracy can be reduced as much as possible.

The slab 20 is operated after one cycle of operation.
Are displaced by a predetermined distance in one direction perpendicular to the transport direction of the slab 20. This shift is performed by repeating the above operation cycle n (≧ 1) cycles and then performing the above control so that the shift of the slab 20 in each cycle of the next n cycles is opposite to the shift of the slab 20 in the previous n cycle. It can be eliminated by controlling the lateral movement means 10 by means.

The forward / backward moving means 7 and the lateral direction moving means 10 each have a rack and pinion mechanism, but the invention is not limited to this, and a device capable of horizontal reciprocating motion may be used. For example, a hydraulic cylinder device may be used.

[0016]

According to the present invention, the position of the skid mark of the slab 20 can be made different for each cycle, and the influence on the plate thickness and the shape accuracy can be reduced as much as possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is an explanatory view for explaining the operation of the lateral movement means according to the present invention.

FIG. 3 is a side view of a conventional slab transfer device.

FIG. 4 is a perspective view of a conventional slab transfer device.

FIG. 5 is a graph illustrating a problem of the conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Walking beam 2 Skid 3 Vertical movement means 4,8 Drive device 5 Gear device 6 Eccentric wheel 7 Forward-backward movement means 9,12 Rack and pinion mechanism 10 Lateral movement means 11 Driving means 20 Slab

Claims (1)

[Claims] 1. A fixed skid on which a slab is mounted, a movable walking beam on which the slab is mounted, an up-and-down moving means for vertically reciprocating the walking beam, and the walking beam is moved forward and backward in the transport direction of the slab. Forward-backward moving means for moving; horizontal-direction moving means for horizontally reciprocating the walking beam in a horizontal direction perpendicular to the conveying direction of the slab; vertical moving means, forward-backward moving means, and horizontal-direction moving means A slab transfer device comprising: