JPS6016846B2 - Combination rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling mill, and more particularly to a combination rolling mill that can be used interchangeably as a universal rolling mill and a multi-stage horizontal rolling mill.

Converting the roll assembly of a universal rolling mill for rolling H-type steel into a multi-stage horizontal rolling mill by roughly replacing it with a multi-stage horizontal roll for rolling structural steel sections such as flat steel, angle steel, and channel steel. A combination rolling mill capable of this has been proposed and put into practical use in recent years.

As such a combination rolling mill, for example, a so-called cross beam type universal rolling mill as shown in FIGS. 1 and 2 is known.

This cross beam type rolling mill has a horizontal roll housing 1.2 and a vertical roll housing 3, 4 provided on the operation side and the drive side, respectively, and a pair of horizontal rolls 5, 5.
and is formed by arranging a pair of vertical rolls 6, 6 (
Figure 1). By roughly replacing these horizontal rolls and vertical rolls for forming the H-shaped steel 9 with multi-stage horizontal rolls 8, 8 as shown in Fig. 2, the operation as a multi-stage horizontal rolling mill for rolling structural steel sections can be realized. It becomes possible. However, in such a cross-beam type combination rolling mill, the vertical roll housing 4 is fixed, so =J
When assembling the corrugated horizontal rolling rolls 8, 8, the outer diameter of the spindle coupling 7 of the rolls interferes with the vertical roll housing 4.

For this reason, the roll diameter and pick-up could only be made to the same extent as the universal horizontal roll 5.5, and there were restrictions on the size of the structural steel section and the roll diameter. Additionally, equipment such as a lifting crane is required to rearrange the roll assembly. A cartridge type combination rolling mill has been proposed in an attempt to improve these problems, and this type uses a vertical roll housing, a roll chock, and a vertical roll housing. A universal rolling roll cartridge and a multi-stage rolling roll cartridge, in which rolls, guides, etc. are integrally incorporated, are designed to be able to be taken in and out from the rolling mill drive side and the entrance in the operation example. In this cartridge type rolling mill, as mentioned above, the vertical roll housing on the drive side is removed together with the cartridge, so there is no interference with the spindle coupling when changing the 2J stage rolling roll assembly, and the combination of rolls and The pickup can be freely selected, and there is no need to use a lifting crane or the like.

However, since all of the above-mentioned mechanisms are incorporated in the cartridge, its structure becomes complicated, and when a secondary roll is required, the entire cartridge must be prepared, which increases costs. SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art and to provide a combination rolling mill in which the universal rolling roll and the multistage horizontal rolling roll can be easily changed.

The present invention provides a combination system in which a universal roll assembly consisting of a horizontal roll and a vertical roll is reassembled into a multi-stage horizontal roll assembly with respect to a horizontal roll housing and a vertical roll housing on the operating side and the driving side. In the machine, the vertical roll housings on the operating side and the driving side are provided to be horizontally rotatable, so that the vertical roll housing on the driving side is moved to a position where it does not interfere with the horizontal roll drive spindle during rolling. Characterized by what has been done.

Embodiments of the present invention will be described in detail below based on the drawings.
FIG. 3 is a plan view showing a combination rolling mill as an embodiment of the present invention in a Nissei Steel rolling state.

Horizontal roll housing 10, 1 on the operating side and on the drive side
1 is horizontal.

A horizontal roll 14 held by the roll chocks 28, 28 is housed therein, and the horizontal roll 14 is coupled via a spindle coupling 16 to a drive source (not shown). On the other hand, vertical roll housings 12 and 13 on the operation side and drive side accommodate vertical rolls 15 and 15 held by vertical roll chocks 27 and 27, and these vertical rolls 15 and 15 are connected to a vertical roll lowering device 21. .22
A rolling load can be applied by vertical roll reduction motors 23 and 24 via vertical roll reduction screws 25 and 26. In this embodiment, the vertical roll housings 12, 13 on the operating side and driving side are replaced by the horizontal roll housings 10, 11 on the operating side and driving side.
are rotatably supported by pins 29, 29, respectively.

Each vertical roll housing 12, 13 is rotated horizontally in the figure clockwise and counterclockwise, respectively, by the operation of opening/closing cylinders 17, 18 attached thereto, and roll and chock assemblies are provided on the operation side and drive side of the rolling mill. A closure part for replacement can be formed in each case. still,
In the figure, reference numeral 19 denotes a roll housing pedestal that supports the vertical roll housing 13 on the drive side from below in the rotational position, and is a stopper for holding the ends of the two-way housing. In the state shown in FIG. 3, the combination rolling mill of this embodiment is driven by the spindle coupling 16 to roll the weave part of the H-shaped steel, and the vertical roll 15, which receives the rolling load from the rolling screw, rolls the flange part of the H-shaped steel. It operates as a universal rolling mill.

In this case, the reaction force of the vertical roll 15 due to the rolling load is supported by the vertical roll housings 12 and 13.
The rolling mill of this example in such an H-shaped steel rolling state is
For example, when converting to a multi-stage horizontal rolling mill for rolling structural steel sections such as flat steel, first operate the opening/closing cylinder 17 in the opening direction and move the vertical roll housing 12 on the operation side to the pin 23. It is opened and rotated clockwise to the position shown by the two-dot chain line in the figure to form a gate on the operating side of the rolling mill.

Next, the roll assembly consisting of the horizontal and vertical rolls 14, 15, their roll chocks 27, 28, etc. is pulled out through the opening on the operating side using a roll changer (not shown). On the other hand, the opening/closing cylinder 18 is similarly actuated in the opening direction to open and rotate the vertical roll housing 13 on the driving side counterclockwise in the figure to form a sealing part, and the housing rotating part is moved to the vertical roll housing pedestal 19. and fixed with the stopper 20 (FIG. 4 shows the state at the open end position).

Here, the roll 30 and roll chock 2 shown in FIG.
8 (a two-stage assembly in the illustrated example) is assembled into the horizontal roll housings 10, 11 by a roll changing device (not shown) through the drive-side closing portion.

Thereafter, the opening/closing cylinder 17 is operated in the closing direction to close and rotate the operating side vertical roll housing 12, which has been in the open state, to the position shown in FIG. 4, and the rolling mill becomes ready for horizontal rolling. As described above, in the combination rolling mill of this embodiment, the vertical roll housings 12 and 13 on the operating side and the driving side are rotatable in the horizontal direction with respect to the horizontal roll housings 10 and 11, so that the combination rolling mill can be turned into a horizontal rolling state. At the time of conversion, the rotation of these housings 12 and 13 forms a gateway for roll replacement, through which the roll assembly can be roughly replaced quickly and easily. In particular, by rotating the vertical roll housing 13 on the drive side to a position where it does not interfere with the spindle coupling 16 at all, it is possible to prevent the vertical roll housing from interfering with the spindle coupling, as in the conventional device shown in FIGS. 1 and 2, for example. combinations of roll diameters, resulting from interference.

Restrictions on lifting and lowering wheels, selection of pickups, etc. are completely eliminated. In this embodiment, the rolling operation using the 2J horizontal rolls is carried out with the drive-side vertical roll housing 13 open, but the end of the housing in the open state is supported on the roll housing pedestal 19, and the stopper 20 Since it is fixed in place, the tool will not vibrate during work. As described above, according to this embodiment, it is possible to quickly and easily convert a universal rolling mill into a one-stage horizontal rolling mill, making it possible to roll H-beam steel and structural steel sections of a wide variety of shapes. The cost of owning the unique equipment and replacement rolls required for this process is significantly reduced.

In this embodiment, conversion to a two-high horizontal rolling mill has been described, but the combination rolling mill of the present invention can be applied to any other multi-high horizontal rolling mill such as a six-reduction horizontal rolling mill.

As described above, according to the combination rolling mill of the present invention, conversion between a universal rolling mill and a multi-stage horizontal rolling mill can be performed extremely easily.

[Brief explanation of the drawing]

1 and 2 are diagrams explaining the respective rolling states of the secondary combination rolling mill, FIG. 3 is a plan view of an embodiment of the present invention, and FIG. 4 is a plan view showing the embodiment in another rolling state. It is a diagram. 10, 11...Horizontal roll housing, 12...Vertical roll housing (operation side), 13...Vertical roll housing (drive side), 14...Horizontal roll, 15...
Vertical roll, 17, 18... Opening/closing cylinder, 23, 2
4...Pin. Figure 1: Chrysanthemum Z diagram Section 3 Diagram 4 diagram

Claims (1)

[Claims] 1. A combination rolling mill in which a universal roll assembly consisting of a horizontal roll and a vertical roll is arranged in a horizontal roll housing and a vertical roll housing on the operating side and the driving side so as to be replaceable with a multi-stage horizontal roll assembly. The vertical roll housings on the operating side and the driving side are provided so as to be rotatable in the horizontal direction, so that the vertical roll housing on the driving side is moved to a position where it does not interfere with the horizontal roll drive spindle when the vertical roll housings on the driving side are rotated. A combination rolling mill characterized by: