JPS6313764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll changing device for a multi-high rolling mill.

Conventionally, roll changing devices for multi-high rolling mills include:
A recombination roll corresponding to each roll assembly is provided in the rolling mill, and a delivery rail whose height matches that of the recombination rail is provided at the front of the rolling mill, and the roll assembly is performed by running the recombination rail and the delivery rail. I was making a change. However, in such an apparatus, a deep pit must be provided for arranging a plurality of delivery rails in front of the rolling mill.
For this reason, when changing the rolls, it is necessary to remove the floor plate for blocking the pits, which not only increases the time required to change the rolls, but also impairs safety when changing the rolls. In addition, the work involved in transporting the roll assembly in a deep pit to the roll shop is complicated.
In this respect as well, there was a problem in that the roll changeover time increased.

The present invention simplifies the floor in front of the rolling mill, and simultaneously reassembles work rolls or work rolls and intermediate rolls without the need for a special roll reassortment cart equipped with rails on which work rolls are placed during roll reassignment. An object of the present invention is to provide a roll changing device for a multi-high rolling mill that can easily perform the following steps on the same floor level.

According to the present invention, each work roll chock provided on the upper and lower work rolls within the housing window of the rolling mill;
Roll rearrangement of a multi-high rolling mill that is provided with intermediate roll jocks provided on upper and lower intermediate rolls that support the work rolls and reinforcing roll jocks provided on upper and lower reinforcing rolls that support the intermediate rolls in sequence along a substantially vertical direction. In the apparatus, a rail member that can be raised and lowered is disposed at the lower end of the lower intermediate roll chock near the wall surface of the housing window, and the rail member is raised and lowered to a position of a delivery rail arranged on the factory floor in front of the rolling mill. A drive device having the ability to A first hydraulic device and a second hydraulic device are installed in this project block to raise and lower the upper reinforcing roll chock and the upper intermediate roll chock, respectively, and a third and second hydraulic device to raise and lower the upper and lower working roll jocks, respectively. 4, and the lower intermediate roll chock is provided with a spacer member having wheels running on the rail member and having a rail for changing work rolls on the upper part thereof,
a second wheel having wheels running on rails formed on the spacer member on the lower work roll chock, and supporting the upper work roll chock so as to form a predetermined gap between the upper and lower work rolls stacked when the rolls are rearranged; A spacer member is provided, and a spacer block that can move forward and backward is arranged between the upper surface side of the housing window and the upper surface side of the upper reinforcing roll chock so as to form a space when changing the rolls. The above object is achieved by employing a configuration in which a spacer block drive device is provided for operation.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing one embodiment of the present invention, and FIG.
The figure is a partial side view of Fig. 1, and Fig. 3 is a partial side view of Fig. 1.
FIG.

1 is a mill housing, 2 is a work roll, 3 is an upper intermediate roll, 4 is a lower intermediate roll, 5 is an upper reinforcing roll, and 6 is a lower reinforcing roll. The lifting rail 7 is connected to a hanging cover 8, and is raised and lowered by a cylinder 9 attached to the upper part of the mill housing 1.

A spacer block 10 is placed on the upper reinforcing roll 5.
The spacer block 10 is configured to fit into a spacer block shift shift rail 12 attached to the tip of the reduction screw 11 and to be able to be shifted out of the housing 1 by a shift cylinder 13.

The chock for work rolls has a built-in auto spacer 14 that overlaps the upper and lower chock for a certain distance when changing the rolls, and the chock for lower intermediate rolls has a rail 15 for changing the work rolls 2 and this rail. A wheeled spacer 16 is provided for lifting and supporting the intermediate roll 4.

The upper reinforcing roll 5 is balanced by a reinforcing roll balance cylinder 17. The upper intermediate roll 3 is held by an upper intermediate roll lifting cylinder 18 when changing the rolls. Further, the work roll 2 can be held by a work roll balance cylinder 19 attached to the housing 1.

Role reshuffling in the above configuration will be explained below in order.

To rearrange the work rolls, as shown in FIG. 4, the reduction slide 11 is slightly raised, the spacer block 10 is shifted out of the housing 1 by the shift cylinder 13, and then the reinforcing roll 5 is moved to the spacer block by the back roll cylinder 17. 10, and further raise the lifting rail 7 to a height where the work roll changing rail 15 matches the rail on the floor. At this time, the work roll changing rail 15 is lifted above the wheeled spacer 16 of the chock for the lower intermediate roll, so the chock is supported by the wheeled spacer 16, and a gap is created between the lower work roll 2 and the lower intermediate roll 4. arise.

A gap is created between the upper and lower work rolls by the auto spacer 14. Next, the upper intermediate roll 3 is lifted by the cylinder 18 to create a gap between the work roll 2 and the upper intermediate roll 3. In this state, the work roll is pulled out onto the floor by a roll towing vehicle.

When changing the work rolls and intermediate rolls, as shown in Figure 5, first the two work rolls and the upper intermediate roll 3 are replaced.
This is done by inserting the spacer 19 when the work rolls are set at the reassembled position in the work roll reassignment procedure described above, and lowering the upper intermediate roll 3 by the lowering movement of the cylinder 18. Lay them on top of each other and pull them out on the floor at the same time. FIG. 6 is a diagram showing a state in which the roll is pulled out. Next, the lifting rail 7 is further raised to the rail position above the floor, and the intermediate roll 4
Pull the assembly out onto the floor. When assembling, work rolls and intermediate rolls can be rearranged at the same level by performing the work in the reverse order as described above.

As an effect of the present invention, not only the front floor of the rolling mill can be simplified, but also the work rolls or the work rolls and the intermediate rolls can be changed without the need for a special roll recombination cart on which the work rolls for recombination are placed. simultaneous reclassification is possible. Moreover, work rolls and intermediate rolls can be rearranged at the same level.
It can also be easily transported to the roll shop at floor level. In addition, since the roll changing device does not create unevenness on the floor, that is, it can be simplified, it is possible to provide an inexpensive roll changing device with good workability and safety.

[Brief explanation of the drawing]

FIG. 1 is a front view of a rolling mill with a rearrangement function showing an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a partially detailed view of FIG. 1. Figure 4 shows
Figure 5 is a diagram showing the relationship between the roll positions and rails when rearranging work rolls, Figure 5 is a diagram showing the roll positions and rail relationships when rearranging upper intermediate rolls and work rolls, and Figure 6 is a diagram showing the relationship between upper intermediate rolls and work rolls. FIG. 3 is a diagram showing a state in which the roll is pulled out from inside the sill. 7... Lifting rail, 8... Hanging bar, 9... Cylinder.

Claims (1)

[Scope of Claims] 1. Each work roll chock provided on the upper and lower work rolls within the housing window of the rolling mill, each intermediate roll chock provided on the upper and lower intermediate rolls that support the work rolls, and the upper and lower reinforcements that support the intermediate rolls. In a roll changing device for a multi-stage rolling mill, which is provided with reinforcing roll jocks provided on the rolls in sequence along a substantially vertical direction, a rail member that can be raised and lowered is attached to the lower end of the lower intermediate roll chock, which is located near the wall surface of the housing window. and a drive device having the ability to raise and lower the rail member to a position of a delivery rail arranged on the factory floor in front of the rolling mill, and a connecting member operated by the drive device and connected to the rail member, A project block is provided facing the housing window over the installation range from the upper intermediate roll chock to the lower work roll chock, and the project block is provided with a first hydraulic device and a first hydraulic device for raising and lowering the upper reinforcing roll chock and the upper intermediate roll chock, respectively. In addition to installing the second hydraulic device,
Third and fourth hydraulic devices are provided for raising and lowering the upper and lower work roll jocks, respectively, and the lower intermediate roll jocks have wheels running on the rail members, and a rail for rearranging the work rolls is provided above the wheels. The lower work roll chock is provided with a spacer member that runs on a rail formed on the spacer member, and the upper work roll chock is provided with a wheel that runs on a rail formed on the spacer member, and the upper work roll chock is provided with a wheel that runs on a rail formed on the spacer member, and the upper work roll chock is provided with a wheel that runs on a rail formed on the spacer member, and the upper work roll chock is provided with a wheel that runs on a rail formed on the spacer member. A second spacer member is provided to support the roll chock, and a spacer block that can move forward and backward is arranged between the upper surface side of the housing window and the upper surface side of the upper reinforcing roll chock so as to form a space when changing the rolls. A roll changing device for a multi-high rolling mill, characterized in that a spacer block driving device for operating the spacer block is provided.