JPH0641006B2 - Slab transfer device in rolling mill - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab transfer device in a rolling mill used to transfer a slab discharged from a furnace to a rolling roll in the rolling mill.

Conventional technology When rolling aluminum (including its alloys),
It is necessary to convey the slab heated in the furnace to the rolling roll. In the transportation of such a slab, conventionally, a rolling table leading to a rolling roll is constituted by a driving roller, and the slab discharged from the furnace is placed on the driving roller and transferred onto the rolling roll on the table.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the slab transfer method as described above, particularly when a shoe pusher type heating furnace is used as the slab heating furnace, the presence of the slab on the table causes the rolled material to be reciprocally rolled. For the reason such as hindering the movement, it was unavoidable to take out the furnace after the rolling was completed and the rolling material and the like were not present on the rolling table. For this reason, the rolling cycle time becomes long, which causes a decrease in production efficiency. In addition, since the slab is carried on the rolling table by the drive roller while being placed on the rolling table, there is a large risk of contact scratches such as rubbing between the slab and the rolling table. Moreover, the rolling table has to be composed of driving rollers from one end to the other, so that the facility cost is high and the driving rollers have to be extended when the furnace is expanded.

The present invention has been made in view of the above technical background, and an object thereof is to shorten the rolling cycle time, prevent rolling table and contact flaws occurring in a slab, shorten the driving roller installation section of the rolling table, and the like. To do.

Means for Solving the Problems The above-mentioned object is to provide a rail (5) provided along the rolling table (2) and a slab that holds a slab (4) that has been evacuated on the rolling table (2) in a vertically movable manner. The present invention is achieved by a slab transfer device in a rolling mill, which has a grip portion (15) and a slab transfer carriage (6) that can travel on the rail (5).

The slab (4) put out on the rolling table (2) from the furnaces (3a) to (3d) is gripped and lifted by the slab gripping part (15) of the slab transfer carriage (6). Since a space is created between the lifted slab (4) and the rolling table (2), the movement of the rolled material during reciprocal rolling is not hindered by the slab (4), and therefore even during the rolling process. The next slab (4) can be fired. The slab (4) gripped and lifted by the slab gripping part (15) is previously conveyed to the vicinity of the rolling roll (1) by the traveling of the slab transfer carriage (6) and is held there, and used for the next rolling after the rolling is completed. To be done.

Example Next, an example in which the present invention is applied to a rolling mill for aluminum will be described with reference to FIGS. 1 to 6.

In FIG. 1 showing the schematic configuration of the slab rolling apparatus,
(1) is a rolling roll, (2) is a rolling table continuing to the rolling roll (1), the rolling table (2) is configured by a drive roller (2a) in a portion close to the rolling roll (1), The part is composed of a free roller (2b). (3a) to (3d) are shoe pusher type slab heating furnaces, and various types are provided according to the size of the slab. The slab (4) heated in the heating furnaces (3a) to (3d) is fed onto the rolling table (2) by a known means (not shown).

On both sides of the rolling table (2), two rails (5) are provided up to the vicinity of the rolling roll (1). As shown in FIGS. 1 and 2, the rail (5) on the opposite side of the heating furnaces (3a) to (3d) is arranged at substantially the same height as the rolling table (2), Those on the heating furnace side are arranged at a position higher than the rolling table (2) so as not to prevent the slab (4) from being taken out of the heating furnace. Moreover, the rails (5) on the side of the heating furnaces (3a) to (3d) are arranged such that the middle portion in the longitudinal direction is further higher than both ends and closer to the other rail.

(6) is a slab carrier. In this slab transfer carriage (6), as shown in FIGS. 2 to 4, at a predetermined position of the carriage frame (7), three pairs each for the rail (5) and a total of six wheels (8a). (8b) and (8c) are attached,
By driving these wheels via a motor (9) mounted on a dolly frame (7), it is possible to travel on the rail (5) from one end to the other end. Further, a pneumatic or hydraulic pressure cylinder (10) is fixed to the center of the bogie frame (7), and the cylinder rod (10a) tip of this cylinder (10) is rolled as shown in FIG. The slab lifting device (11) is provided at a position just above the table (2) and along the length direction of the rolling table (2). Therefore, the slab lifting device (11) can be raised and lowered by vertically moving the cylinder rod (10a) by the cylinder (10). Note that (12) and (12) shown in FIG. 5 are guides whose lower ends are connected to the slab lifting device (11) and which are slidably provided through the bogie frame (7). And the slab lifting device (11)
A long base portion (13) for accommodating the ball screw (16) and a pair of arm portions (14, 14) attached to the base portion are formed in a gate shape. The arms (14) and (14) are interlocked with the ball screw (16) and can move in a direction toward or away from each other by the rotation of the ball screw (16). Reference numeral (17) shown in FIG. 6 is a ball screw driving motor mounted on the bogie frame (7).

Further, the arms (14) and (14) have a front view from an inclined portion (15a) and a horizontal portion (15b). The slab grips (15) (15) formed in the shape of the roller (15) with the claws (15c) (15c) at the tips of the horizontal parts facing each other.
d) It is housed so that it can move diagonally up and down along (15d). When a downward load due to the weight of the slab is applied to both slab gripping parts (15) and (15) via the claws (15c) and (15c), the inclined parts (15a) and (15a) are moved to the rollers (15d) and (15d). Move diagonally inward downward along the two claws (15
c) It is said that the interval of (15c) will be reduced.

In the slab transfer device of the illustrated embodiment, when the slab (4) is taken out from the furnaces (3a) to (3d) onto the rolling table (2),
The slab carrier (6) runs on the rail to the position of the slab and stops there. Then, the cylinder (10) is operated to lower the slab lifting device (11) with the arms (14) and (14) thereof being separated from each other at the maximum distance. After descending motor (1
7) and rotate the ball screw (16) to rotate both arms (1
4) Bring the (14) closer to each other, and hold the claw (15) of the slab grip (15).
c) Abut (15c) on the front and rear end faces of the slab. Then
The cylinder (10) is operated in the reverse direction to raise the slab lifting device (11). Along with this, the arms (14) and (14) also rise, but the gripping parts (15) and (15) are pulled downward by the weight of the slab (4), and the inclined parts (15a) thereof are rollers (15d).
Moves diagonally inward and downward along. Then, the distance between the claws (15c) (15c) at the tips of both grips is narrowed, and the slab (4) is further subjected to a force in the biting direction by the claws. Thus, the slab (4) is lifted from the claws (15c) (15c) under a strong clamping force based on its own weight. The carriage (6) holding the slab (4) is a rolling table (2).
After self-propelled to the drive roller portion of the slab, the slab lifting device (11) is lowered to roll the slab (4) on the rolling table (2).
Grate on top. Then, the arms (14) (14) are moved in the separating direction to release the grip of the slab. Then, the slab (4) is conveyed to the rolling roll (1) by the driving roller of the rolling table (2) and used for rolling.

While the front slab (4) is being reciprocally rolled,
Take out the next slab from the furnace. The slab that has been taken out of the furnace is the slab lifting device (11) of the slab carrier (6) as described above.
It is lifted by. Since a space is created between the lifted slab (4) and the rolling table (2), the movement of the rolled material in the preceding stage during rolling is not hindered. Therefore,
It is not necessary to wait for the furnace unloading until the rolling of the first stage is completed, and it is possible to unload the slab of the next stage during rolling.

The slab transfer carriage (6) that lifts the slab of the next stage is self-propelled to the drive roller portion (2a) of the rolling table (2) and waits there, and then the slab (4) gripped after the rolling of the slab of the previous stage is completed. On the rolling table (2) to start rolling the slab. The same operation is repeated thereafter.

EFFECTS OF THE INVENTION According to the present invention, the slab can be lifted by the slab carrier, and in the lifted state, the rolling of the slab in the preceding stage is not hindered at all. Therefore, even in the shoe pusher type heating furnace, It is possible to remove the slab from the furnace during the rolling process without waiting for the completion of rolling.
Therefore, the rolling cycle time can be shortened and the productivity can be improved.

In addition, since the slab transfer cart can be self-propelled on the rail with the slab being lifted, it is possible to transfer the slab to the rolling rolls without forming the rolling table entirely by the drive rollers. Moreover, since the contact area between the rolling table and the slab can be reduced as much as possible, the risk of contact flaws occurring on the slab can be reduced. Moreover, since the slab is transported by the transport cart as described above, it is possible to eliminate or shorten the expensive driving roller portion of the rolling table, and as a result, it is possible to reduce the equipment cost and to expand the furnace. It is not necessary to extend the drive roller portion.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of a slab transfer device according to the present invention, FIG. 2 is a front view of a slab transfer carriage, and FIG.
The figure is also a side view, FIG. 4 is a plan view, FIG. 5 is a front sectional view of the lifting device, and FIG. 6 is a sectional view taken along line VI-VI of FIG. (2) …… Rolling table, (4) …… Slab, (6)…
… Slab carrier, (15) …… Slab grip.

Claims (1)

[Claims] 1. A rail (5) provided along a rolling table (2), and a slab gripping portion (15) for gripping a slab (4) which is furnace-exposed on the rolling table (2) so as to be able to move up and down. And a slab transfer carriage (6) that can travel on the rail (5).