JPH11169919A - Transporting table in rolling mill and method for changing roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bite a material to be rolled with upper and lower rolling rolls by feeding it to the lower rolling roll even when the material to be rolled is furthermore shortened and to easily execute roll changing. SOLUTION: This table is a transporting table 21 for transporting the material to be rolled to the lower rolling roll 4a of a rolling mill. The table roller 21a on the side of the rolling roll of the transporting table 21 is entered to the vicinity of the lower rolling roll 4a in the housing 2 of the rolling mill. An elevating/lowering mechanism 22 for vertically moving this transporting table 21 is arranged. By this arrangement, the material to be rolled is surely fed to the lower rolling roll 4a even when the material to be rolled is shortened and biting with the upper and lower rolling rolls 4a, 4b is enabled. By only elevating or lowering the transporting table 21 by driving the elevating/lowering mechanism 22, interference between the rolls 4a, 4b and the transporting table 21 is prevented and roll 4a, 4b changing is executed easily and in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport table in a rolling mill, the tip of which is inserted into a rolling mill, and a method of exchanging rolls in a rolling mill when the transport table in the rolling mill is arranged.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 3 and 4, a conveying roller table 1 disposed on an entrance side and an exit side of a rolling mill for rolling a metal material, as shown in FIGS. It is common that they do not penetrate to the inside.

[0003] Therefore, as shown in FIG. 4, the length L of the material 3 to be rolled is adjusted by the table roller 1 a on the rolling mill housing 2 side.
And when it is shorter than the interval L1 between the lower rolling roll 4a, the material 3 to be rolled is fed into the lower rolling roll 4a,
Since the material cannot be bitten by the upper and lower rolling rolls 4a and 4b, a separate feed roll 5 is arranged in the rolling mill housing 2 as shown in FIGS. By driving the feed roll 5, the material 3 to be rolled is fed to the lower rolling roll 4a, and bitten by the upper and lower rolling rolls 4a, 4b. 3 to 6, 4b is an upper rolling roll, 6a is a lower backup roll, 6b is an upper backup roll, 7 is a drive shaft of a table roller of the roller table 1, 8 is a driving gear, 9 is an axle box of rolling rolls 4a and 4b and backup rolls 6a and 6b.
0 indicates a bearing of the feed roll 5.

[0004]

However, as shown in FIG. 6, the length L of the material 3 to be rolled is
When the distance is shorter than the distance L2 between the first and second lower rolling rolls 4a, as shown in FIGS.
, The rolled material 3 could not be fed into the lower rolling roll 4a and bitten by the upper and lower rolling rolls 4a, 4b. In addition, the width L of the rolling mill housing 2
3, and the length L4 of the roll chock portion is shortened, the interval L1 between the table roller 1a and the lower rolling roll 4a and the interval L2 between the feed roll 5 and the lower rolling roll 4a are inevitably shortened. The rolled material 3 can also be sent to the lower rolling rolls 4a and bitten by the upper and lower rolling rolls 4a and 4b. In order to secure it, it is structurally impossible to shorten it to some extent or more.

[0005] As shown in FIGS. 7 and 8, when the roller table 1 is inserted into the inside of the rolling mill housing 2, even if the material to be rolled 3 is further shortened, the material to be rolled 3 is lowered. Can be delivered to the side rolling roll 4a. In this case, however, the axle box 9 of the lower rolling roll 4a is connected to the rolling mill housing 2 especially when the lower rolling roll 4a is withdrawn or inserted in the axial direction in order to change the roll. There is a problem that the roller table 1 interferes with the inside of the roller table 1.

[0006] In order to solve the above problem, when replacing the rolls, the lower rolling roll 4a and the axle box 9 are pulled out or inserted from the rolling mill housing 2 while avoiding interference with the roller table 1. Roller table 1
Can be easily conceived by sliding from the position of FIG. 9A to the position of FIG. 9B to avoid interference with the axle box 9. However, in actual rolling equipment, since the roller table 1 is often long in the rolling direction, it is not mechanically easy to slide them all in the rolling direction.

Further, as shown in FIG. 10A, a part 1b of the roller table 1 is moved upward (or laterally) and once evacuated from the transport line.
As shown in (b), a method of shifting a roller table (hereinafter, referred to as a “transport table”) 11 that has entered the rolling mill in the rolling direction can be easily conceived. In order to move the roller, two operations are required, the driving of the table is divided into three parts, and the table becomes mechanically complicated. Further, there is a problem that the time required for replacing the rolling rolls becomes long.

Further, as shown in FIG. 11, when a plurality of rolling mills are arranged in tandem, the transfer table 11a installed between the rolling mills cannot slide in the rolling direction by the method shown in FIG. Therefore, it is not possible to avoid interference between the lower rolling roll 4a and the axle box 9 and the transfer table 11a. In addition, when the distance between the rolling mills is short, the method shown in FIG. 10 is also difficult to adopt because the transport table 11b becomes shorter in the rolling direction.

[0009] That is, when the roller table is inserted into the rolling mill, even if the material to be rolled is further shortened, it can be sent to the lower rolling roll and bitten by the upper and lower rolling rolls. At the time of replacement, particularly, the equipment configuration for avoiding interference between the lower rolling roll and the axle box and the roller table becomes complicated, and realization is difficult.

The present invention has been made in view of the above-mentioned conventional problems. Even when the material to be rolled is further shortened, the material can be fed to the lower rolling roll and bitten by the upper and lower rolling rolls. In addition, it is an object of the present invention to provide a transfer table in a rolling mill and a method of exchanging rolls, which can easily exchange rolls.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is directed to a method in which a table roller on a rolling roll side of a roller table is inserted into the vicinity of a rolling roll in a rolling mill housing, and the roller table is removed. An elevating mechanism that moves up and down is arranged. And
In this way, even if the material to be rolled becomes shorter, the material to be rolled can be fed to the lower rolling roll and bitten by the upper and lower rolling rolls, and the roll can be replaced easily and in a short time. You.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A transport table in a rolling mill according to the present invention is a transport roller table for transporting a material to be rolled to a lower rolling roll in a rolling mill. An elevating mechanism for moving the roller table up and down while placing it near the lower rolling roll in the housing is arranged.

In the rolling table of the present invention, the table roller on the rolling roll side of the roller table is inserted into the vicinity of the lower rolling roll in the rolling mill housing. The material to be rolled can be fed to the rolling rolls on the side and bitten by the upper and lower rolling rolls.

Further, according to the roll exchanging method of the present invention, when exchanging a roll of a rolling mill in which the transport table in a rolling mill of the present invention is arranged, for a roll that does not interfere with the tip of a roller table located in the rolling mill housing, Pull out the roll from the rolling mill housing as it is, and for the roll where the tip of the roller table interferes, drive the elevating mechanism to raise or lower the roller table to a position where it does not interfere with the roll, then pull out the roll from the rolling mill housing To replace.

According to the roll exchanging method of the present invention, when the tip of the roller table interferes with the roll, the roller mechanism is raised or lowered by driving the lifting mechanism to prevent the interference between the roll and the roller table.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
And an embodiment shown in FIG. 2 and extends to a method of exchanging rolls of a rolling mill provided with the transport table in the rolling mill. FIG. 1 is a schematic explanatory view of a transport table in a rolling mill according to the present invention and a rolling mill in which the transport table in the rolling mill is arranged. FIGS. 1 (a) to 1 (d) illustrate a method of exchanging rolls in order. FIG. 2 is an AA view taken in the direction of the arrow in FIG.

1 and 2, reference numeral 21 denotes a transfer table of the present invention. As shown in FIG. 2, a table roller 21a at the tip of the transfer table 21 is inserted into the vicinity of a lower rolling roll 4a in the rolling mill housing 2. I'm making it. Reference numeral 22 denotes an elevating mechanism for moving the transport table of the present invention up and down, for example, a hydraulic cylinder, a screw jack, or the like is employed.

The transport table 21 according to the present invention comprises a table roller 2 at the tip of a roller table located on the roll side.
1a is inserted into the vicinity of the lower rolling roll 4a in the rolling mill housing, so that the distance L1 between the table roller 21a at the tip thereof and the lower rolling roll 4a can be made as short as possible. Even if the material 3 is shortened, the material 3 to be rolled can be delivered from the transport table 21 to the lower rolling roll 4a and bitten by the upper and lower rolling rolls 4a and 4b.

Next, a method of exchanging rolls of a rolling mill provided with the transport table 21 of the present invention having the above-described configuration will be described. First, as is clear from FIG. 1A, the upper rolling roll 4b and its axle box 9 and the upper backup roll 6b and its axle box 9 which do not interfere with the transfer table 21 are extracted from the rolling mill housing 2. [See FIG. 1 (b)].

Next, the lifting mechanism 22 is driven to
As shown in (c), the transport table 21 is raised to a position where it does not interfere with the lower rolling roll 4a and its axle box 9, and the lower backup roll 6a and its axle box 9.

Thereafter, the lower rolling roll 4a and its axle box 9 and the lower backup roll 6a and its axle box 9 are extracted from the rolling mill housing 2 (see FIG. 1D). After the removal, a new roll is inserted in the reverse order to the above, and the exchange of the roll is completed.

According to the above-described roll exchanging method of the present invention, even when exchanging rolls of a rolling mill in which the transport table 21 of the present invention is arranged, the roll exchanging can be performed easily and in a short time. This is the same also when a plurality of rolling mills are arranged in tandem.

In this embodiment, when the upper rolling roll 4b and its axle box 9 and the upper backup roll 6b and its axle box 9 are pulled out of the rolling mill housing 2, the transfer table 21 is not raised. As described above, when these are in such a positional relationship as to interfere with the transport table 21, it goes without saying that the transport table 21 is lowered before being extracted.

[0024]

As described above, in the transfer table in the rolling mill of the present invention, the table roller on the rolling roll side of the roller table is inserted into the vicinity of the lower rolling roll in the rolling mill housing. Even if the rolled material is shortened, the material to be rolled can be reliably fed to the lower rolling roll and bitten by the upper and lower rolling rolls.

In the method of replacing a roll according to the present invention, when the leading end of the roller table interferes with the roll, interference between the roll and the roller table is prevented by merely driving the lifting mechanism to raise or lower the roller table. So you can
The roll can be changed easily and in a short time.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a transport table in a rolling mill of the present invention and a rolling mill in which the transport table in the rolling mill is arranged;
(A)-(d) is a figure explaining step-by-step how to change a roll.

FIG. 2 is a view taken along the line AA of FIG. 1 (a).

FIG. 3 is a schematic explanatory view of a transport roller table provided outside a rolling mill housing.

FIG. 4 is a BB view of FIG. 3;

FIG. 5 is a schematic explanatory view in a case where a feed roll is separately arranged in a rolling mill housing in FIG. 3;

6 is a view taken in the direction of arrows CC in FIG. 4;

FIG. 7 is a drawing when the roller table is inserted into the inside of the rolling mill housing.

8 is a view taken along the line DD in FIG. 7;

FIG. 9 is an explanatory view of a first replacement method in a case of replacing a roll of a rolling mill in which a roller table is arranged as shown in FIG. 7, (a) is a view showing a state at the time of rolling,
(B) is a figure which shows the state which moved the roller table away from the rolling mill.

10A and 10B are explanatory diagrams of a second replacement method in a case of replacing a roll of a rolling mill in which a roller table is arranged as shown in FIG. 7, and FIG. FIG. 4B is a diagram illustrating a state in which the roller table is retracted, and FIG. 4B is a diagram illustrating a state in which the roller table that has entered the inside of the rolling mill housing is moved away from the rolling mill;

FIG. 11 shows a case where a plurality of rolling mills are arranged in tandem.
FIG.

[Explanation of symbols]

 2 Rolling mill housing 4a Rolling roll 21 Transfer table 21a Table roller 22 Lifting mechanism

Claims (2)

[Claims] 1. A conveying roller table for conveying a material to be rolled to a lower rolling roll in a rolling mill, wherein a table roller on the rolling roll side of the roller table is moved to a position near a lower rolling roll in a rolling mill housing. A transport table in a rolling mill, wherein a lifting mechanism for moving the roller table up and down is arranged. 2. A method for exchanging rolls of a rolling mill provided with a transfer table in a rolling mill according to claim 1, wherein the rolls located at the ends of the roller tables located in the rolling mill housing do not interfere with each other. For rolls that are pulled out of the rolling mill housing and where the tip of the roller table interferes, drive the elevating mechanism to raise or lower the roller table to a position where they do not interfere with the roll, and then pull out the roll from the rolling mill housing and replace it. A method of exchanging rolls.