JPS59107711A - Roll rearranging device of rolling mill - Google Patents

Abstract

PURPOSE:To operate safely in a short time in rearranging rolls by means of chock wheels and installed rails by connecting upper and lower chocks by means of a pin, and transferring them while supporting the upper chock by means of supporters provided to the lower chock. CONSTITUTION:A stand 7 is provided with rails 8, 9. An upper roll set 2, 3 is lifted to insert a connecting bar 21 into the holes of upper and lower chocks. Both sets of upper and lower rolls are transferred to the rails 12 of a truck 11 by means of wheels 6. Spacer ratches 16, 15 are stood in sequence by meshing a rack 20 attached to the exit of the stand 7 with gears 17, 19, to support the chock 3 made out of the upper rails 8. The same automatic supporting and releasing operation is also performed in case of incorporating the roll set. The operation is rapidly performed by a safe and simple mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a roll changing device for a rolling mill, which allows upper and lower roll assemblies to be easily replaced when an IJ tube is present in the rolling mill.

Recently, there has been an increasing demand for rolling mills installed in rolling lines to be continuous, and rolling mills may continue to operate at all times with coils connected at the input side of the rolling equipment, or rotary shafts may be installed at the exit side of the rolling mill. etc., to enable continuous operation without stopping the line. In these rolling equipment and equipment where a rolling mill is installed as part of the process line, work rolls, etc. need to be replaced as the operating time passes, but since strip is always present in the rolling mill, this strip cannot be replaced. Roll assemblies such as work rolls must be taken out and inserted outside of Noujifugu so that they do not interfere with the work rolls.

However, when the lower work roll and upper work roll chock are stacked on top of the lower back-up roll chock, which is known as a conventional roll changing device, and the 30-le cluster type changing device is pulled out of the housing, or the new roll is loaded next to it, There is a side-shift type recombination trolley that removes the old work roll from the housing and then operates the side shift mechanism on the trolley to insert the new roll, but none of them can be used when an IJ knob is present. It is possible.

On the other hand, as a reversing device capable of exchanging rolls while strips are present in the rolling mill, there is known a reversing device that uses a reassembling cart equipped with two upper and lower rails as shown in FIG.

In order to use the stiffness rearranging device, in the rolling mill, wheels are attached to the work roll chocks 3 of the upper and lower work roll assemblies 4.5, which are composed of the work rolls 2 and work roll chocks 3, etc., which are placed between the upper and lower sides of the strip 1 existing in the rolling mill. 6 is attached to the housing 7, and a top rail 8 and a bottom rail 9 are detachably attached to the housing 7 in a right angle direction so as to intersect the pass line.

On the other hand, a recombination trolley 11 that runs on rails 10 is provided on the outer side of the housing 7 in the direction perpendicular to the pass line. A top transfer rail 14 connected to the top rail 8 is a mounting and fixing member.

Therefore, when replacing the upper and lower work roll assemblies 4.5, the upper and lower work roll assemblies 4 and 5 should be raised using a balance cylinder, and then the top rail 8 and bottom rail 9 should be mounted, and then lowered to replace the wheels 6. Place each. Next K, run the recombination trolley 11, connect the top rail 8 and bottom rail 9 to the top transfer rail 14 and bottom transfer rail 12, and move the upper and lower work roll assemblies 4 and 5 without interfering with the strip 1. Transfer to the recombination truck 11. After this, the old work roll assemblies 4 and 5 on the replacement trolley 11 can be maintained, or replaced with a new work roll assembly for maintenance, and installed in the housing 7 in the reverse procedure to the above to replace the rolls. is completed.

However, since two levels of rails are mounted on the recombinable trolley 11, the working space becomes narrow and the weight increases, making it uneconomical. Another disadvantage is that when the upper and lower work roll assemblies transferred to the recombination trolley are transported by a crane or the like and replaced with spare ones, the top transfer rail and mount get in the way, deteriorating work efficiency. .

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such conventional drawbacks and provide a roll changing device for a rolling mill with a simple structure that allows the roll assembly to be replaced even when a strip is present in the rolling mill. The configuration of the present invention that achieves this object is that in a roll changing device that inserts and removes upper and lower roll assemblies arranged above and below a pass line from a housing, the upper and lower roll assemblies are connected to the pass line in and near the housing. The upper and lower roll assemblies include an internal support member that supports the housing so as to be horizontally movable in intersecting directions, and an external support member that can hold the upper roll assembly on the lower roll assembly at a predetermined distance outside the housing. It is characterized in that it is provided on either one of the following.

Hereinafter, one embodiment of the present invention will be described in detail based on FIGS. 2(a) to (d) and FIG. 3.

First, on the rolling mill side, the strip 1 existing in the rolling mill is
Wheels 6 are attached to upper and lower work roll assemblies 4 and 5, respectively, which are provided with work rolls 2 and work roll chocks 3, etc., which are placed between the upper and lower sides. and,
The upper and lower work roll assembly lJ4, 5' can be horizontally moved in the direction of the pass line box angle, which is the direction intersecting the pass line, through the wheels 6, and so as not to interfere with the strip 1.
Each top rail 8 is attached to the housing 7 to support the
A bottom rail 9 is detachably attached to the housing 7, and the lengths of these rails 8 and 9 are determined so that the upper and lower work roll assemblies 4 and 5 can be supported at and near the housing 7. Part of it sticks out.

On the other hand, in order to support the upper and lower work roll assemblies 4 and 5 at locations other than where the upper and lower work roll assemblies 4 and 5 are supported by the housing 7 and the top rail 8 and bottom rail 9 in the vicinity thereof, that is, outside the housing 7. A rail 10 is laid on the working side of the housing 7, on the outside in the direction perpendicular to the pass line (on the right side in FIG. 2), on which a recombinable cart 11 is placed so as to be able to run. A bottom transfer rail 12 is mounted on this recombination truck 11 and is connected to a bottom rail 9 that is attached to and detached from the housing 7, with one end protruding toward the housing 7 side. Therefore, the lower work roll assembly 5 can be inserted into and removed from the housing 7 while being supported by the bottom rail 9 inside and near the housing 7 and by the bottom transfer rail 12 outside the trench housing 7. Therefore, outside the housing 7, an upper work roll assembly 4' is placed above the lower work roll assembly 5 at a predetermined distance. Spacer latches 15 and 16 as external support members are respectively provided at the left and right end portions of the upper and lower work roll assemblies 4 and 5 facing the roll chocks 30 so that they can be supported and taken out of the line. As shown in FIG. 3, the spacer latches 15 and 16 are rotatably attached to the lower roll chock 3 via a shaft 17 in the pass line direction so that they can fall over so as not to interfere with the strip 1 when moving within the housing 7. When the spacer latches 15 and 16 are erected, their upper ends abut against and support the lower end of the upper roll chock 3. A gear 18 is attached to the shaft 17 in order to automatically overturn or raise the spacer latch 15, 16 near the housing 7. On the working side, this gear 18 directly
On the drive side (left side of the pass line in Figure 2), this gear 18
By rotating each of them forward and backward by 90 degrees through the gears 19 that mesh with them, they fall over or stand up.

On the other hand, a rack 20 of a length capable of meshing with these gears 18 or 19 and rotating the gears 18 and 19 by 90 degrees is attached to the outer wall of the working side of the housing 7, and the lower workpiece roll assembly 5 is connected to the bottom rail 9 and the bottom transfer rail 1
These gears 18, 19 and the rack 20 mesh with each other when moving the rack 20. Further, a connecting rod 21 for connecting and moving the upper and lower work roll assemblies 4 and 5 together is attached to the lower roll chock 3 on the working side, and the tip thereof is attached to the upper roll chock 3.
It is engaged with the recessed part of.

To rearrange the rolls using the roll rearranging device configured as described above, first, the upper and lower work roll assemblies 4 and 5 are raised using the balance cylinder of the rolling mill, the top rail 8 and the bottom rail 9 are attached to the housing 7, and then the upper and lower work roll assemblies 4 and 5 are lowered. and place each wheel 6 on each rail 8, 9 (second
(See figure (a)). In this state, the upper and lower work roll assemblies 4 and 5 are connected by the connecting rod 21, and the spacer latches 15 and 16 are in an overturned state. Next, the recombination cart 11 is run to connect the bottom rail 9 of the housing 7 and the bottom transfer rail 12 of the recombination cart 11,
Upper and lower work roll assemblies 4 and 5 are attached to the top rail 8
and along the bottom rail 9, but just before the wheel 6 on the working side of the upper work roll assembly 40, that is, on the running tip side, comes off the top rail 8, the gear 18 of the spacer latch 16 engages with the rank 20, and the spacer latch 16 is moved. be stood up. Then, the upper and lower work roll assemblies 4 and 5 are further pushed out, and the drive side of the upper work roll assembly 4, that is, the wheel 6 on the left side in FIG.
spacer latch 1 just before it comes off the top rail 8.
5 meshes with the rack 20, the spacer latch 15 is erected, and the upper work roll assembly 4 is held on the lower work roll assembly 5 with a predetermined distance therebetween.

On the other hand, when inserting the upper and lower work roll assemblies 4 and 5 into the housing 7, the lower work roll assemblies 5 and 5 are placed on the rearrangement cart 11 via the spacer latches 15 and 16 at a predetermined distance. The work roll assembly 4 can be inserted by supporting the work roll assembly 4 and performing the operation in the reverse order to that described above.

The spacer latch 15,1611- is set to a height that allows the upper work roll assembly 4 to fall or stand up within the distance between the upper and lower work roll assemblies 4 and 50 when the upper work roll assembly 4 is supported by the top rail 8.

According to such a recombination device, the space latches 15 and 16 can be automatically attached to the recombination cart 11 without attaching the top transfer rail connected to the top rail 8 in the housing 7 via a frame as in the conventional case. By falling or standing up,
Even if the strip 1 is present in the rolling mill, the upper and lower work roll assemblies 4 can be moved without interfering with the strip 1.
, 5 can be inserted and removed.

In the above embodiment, the spacer latch 15 is rotated by two gears so as to fall or stand up in the opposite direction to the spacer latch, but if the two gears are rotated in the same direction, the number of gears can be reduced to one. Further, the spacer latch is not limited to the one that drives the spacer latch using a gear and a rack, but may be rotated using a link or a chain. Furthermore, the spacer latch is not limited to a rotating spacer latch, but may be a vertically reciprocating type, for example, which automatically controls the supply of working fluid to a fluid pressure cylinder.

As described above in detail with the embodiments, according to the present invention, the upper roll assembly is supported at a predetermined distance above the lower roll assembly outside the housing of the rolling mill via an external support member, and the upper roll assembly is supported outside the housing of the rolling mill. Inside the housing and in the vicinity thereof, the upper and lower roll assemblies are supported by internal support members provided in the housing, so that even if a strip is present in the rolling mill, the rolls can be easily replaced.

Therefore, the workability of the rearranged truck is improved, and it is also lightweight and economical.

[Brief explanation of drawings]

1(a) and 1(b) are front views of a conventional roll changing device, respectively, and FIGS. 2(a) to 2(d) are front views of an embodiment of the roll changing device of a rolling mill according to the present invention. Figure, 3rd
The figure is an enlarged view of the main parts. In the drawings, 1 is a strip, 4.5 is an upper and lower work roll assembly, 6 is a wheel, 7 is a housing, 8 is a top rail, 9 is a bottom rail, 11 is a recombination trolley, 12 is a bottom transfer rail, 15.16 is a spacer latch, 18 and 19 are gears, 20 is a rack, and 21 is a connecting rod. Patent applicant Mitsubishi Heavy Industries, Ltd. Ryofune Engineering Co., Ltd. Sub-agent Patent attorney Shibe Mitsuishi (and 1 other person) Figure 3 6 3

Claims (1)

[Claims] In a roll changing device that inserts and removes upper and lower roll assemblies arranged above and below a pass line from a housing, an interior that supports the upper and lower roll assemblies within the housing and in the vicinity so that they can move horizontally in a direction intersecting the pass line. a support member is provided on the housing;
/・A rolling mill characterized in that an external support member capable of holding the upper roll assembly on the lower roll assembly while holding the upper roll assembly at a predetermined distance outside Ujifugu is provided on any part of the upper and lower roll assemblies. roll changing device.