JPH0465722B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rolling roll changing device that can change work rolls in a rolling mill at low cost.

<Prior Art> In a rolling mill that rolls metal strips such as steel plates, the work rolls are especially worn during the rolling process, so the rolls are replaced every time the rolling process is performed for a certain period of time. A roll changing device is attached to the rolling mill for the purpose of changing the rolls.

FIG. 3 shows an example of the roll changing device of such a conventional thick plate rolling mill, and FIG. 4 shows its planar shape.
As shown in the figure, an upper work roll assembly 1 and a lower work roll assembly 10 that are incorporated into a rolling mill include an upper work roll 2, its left and right roll bearing boxes 3a and 3b, and a lower work roll 20, respectively.
and its roll bearing boxes 30a, 30b. Bearing boxes 30a, 30 of lower work roll 10
A pair of left and right wheels 4 are respectively attached to b, and rails 5a, 5b, 5 are attached along a direction parallel to the roll axis (left-right direction in the figure).
c, 5d. A coupling fitting 6 is protruded from the end face of the bearing box 30a on the side opposite to the rolling mill (left side in the figure), and can be detachably attached to an automatic coupling machine 8 of an electrically driven traction cart 7 for changing work rolls. connected. On the other hand, on the side of the housing 9 of this rolling mill, a side shift buggy 11 is installed which has a pair of mutually parallel rails 5c, 50c attached to its upper surface. Used upper work roll assembly 1 and lower work roll assembly 10 pulled out at
Equipped with This side shift buggy 11 is connected to the rails 5c and 5c via a set of wheels 12.
The shift drive device 15 runs on a pair of left and right rails 14 laid on the foundation 13 in a state perpendicular to the rails 50c. In this example, the shift drive device 15 is
A pair of cylinders 15a are used, and these side shift buggy 11 and shift drive device 15 are
Usually, they are arranged in underfloor pits 16a, 16b on the sides of the rolling mill. Note that the upper and lower back-up roll assemblies 17, 170 are connected to the running rail 18.
The rails 14 for shifting the side shift buggy 11 are supported by a support base 21, which is pulled out by a tow truck 19 for rearranging the back-up rolls running above. Further, the towing truck 7 is provided with a cable reel 22.

When rearranging the rolls, the side shift buggy 1 which is waiting for the upper and lower work roll assemblies 1 and 10 from inside the housing 9 by the tow truck 7
1, the coupling device 8 of the tow truck 7 is opened to operate the cylinder 15a, and the side shift buggy 11 is moved upward in FIG. 4 to move the rail 50c to the rail 5b. Match so that it forms a straight line. Next, in advance, the rail 50c
The new upper and lower work roll assemblies 1 and 10 mounted on the housing 9 are moved by the tow truck 7.
Push it in to complete the roll change. and,
Side shift buggy 11 in preparation for the next roll change
Used work roll assembly 1, 10 above
The machine is transported to a roll shop (not shown) and undergoes maintenance such as roll grinding.

Thereafter, in the same manner, the side shift buggy 11 is alternately shifted in the vertical direction in FIG. 4, thereby sequentially changing the rolls.

<Problems to be Solved by the Invention> In conventional rolling roll changing devices, the total length of the side shift buggy must be approximately equal to the total length of the rolls, especially when the roll body length is long as in a plate rolling mill. Indeed, the equipment becomes extremely large, which increases equipment costs, and it also requires a large pit to house the equipment, which increases the amount of foundation excavation and increases construction costs, resulting in significant economic disadvantages. There were flaws.

In view of the problems with the conventional rolling roll changing apparatus, the present invention provides a rolling roll changing apparatus which is compact in structure, has low equipment costs, requires less foundation excavation, and can save construction costs. The purpose is to

<Means for Solving the Problems> The rolling roll changing device of the present invention moves a roll assembly having a roll and a bearing box that rotatably supports both ends of the roll into a rolling mill housing in a direction parallel to the roll axis. In the mill roll changing device, the roll assembly is pulled out from the side shift buggy and moved in a direction perpendicular to the roll axis to change the rolls. A plurality of side shift buggies each supporting the bearing boxes are provided in correspondence with the number of the bearing boxes.

<Operation> The bearing boxes at both ends of the roll of the roll assembly are supported by separate side shift buggies, and the roll assembly is moved in a direction perpendicular to the roll axis to perform roll change.

<Embodiment> As shown in FIG. 1 showing the structure of an embodiment of the rolling roll changing device according to the present invention and FIG. A support stand 3 is removably installed on a traveling rail 18 that guides the movement of a towing trolley 19 for back-up roll rearrangement provided in the back-up roll 16b.
1, and two sets of side shift buggies 3 that are horizontally movable on this support stand 31 in a direction perpendicular to the roll axis.
2a, 32b, and these side shift buggies 32
a, 32b shift drive devices 33a, 33b;
It is composed of a tow truck 7 and the like for changing work rolls.

Grooves 35, 350 each having a pair of rails 34 orthogonal to the roll axis are provided at both ends of the support base 31 in the longitudinal direction (direction parallel to the roll axis). 32b can run on these. Further, in the center of the support base 31, there are rails 5c 1 , which are connected to the towing cart 7 for work roll rearrangement and the rails 5a, 5b, and 5d for guiding the traveling of the work roll assemblies ₁ and 10, respectively. 5c ₃ and 5c ₅ are installed. Said side shift buggy 32a, 32b
is a buggy 320 with a pair of left and right wheels 36 installed symmetrically with the roll axis as the axis of symmetry.
a, 320b, and these buggies 320a, 3
On the upper surface of 20b are the rails 5c ₁ and 5, respectively.
rail 5c ₂ that can be connected to c ₃ , 5c ₅ and detachable;
5c ₄ is attached, and the upper and lower work roll assemblies 1 and 10 are supported at the lower portions of the bearing boxes 30a and 30b at both ends of the rails 5c ₂ and 5c ₄ , respectively. Also, buggy 320a, 320
b shows the rail 34 on the support stand 31 and this rail 3.
The shift drive device 3 has a pair of left and right cylinders 330a and 330b installed on the bottom of the pit 37, and a rail 38 in a pit 37 connected to the shift drive device 3.
3a and 33b in the vertical direction in FIG. In this case, a pair of left and right cylinders 330a,
330b is equipped with a cylinder synchronization mechanism that can be driven at a synchronous speed (not shown), or the buggy 320
It is equipped with a tuning mechanism that mechanically connects and tunes a and 320b. Furthermore, each cylinder 3
At the backward limit position of the buggies 320a, 330b, the buggies 320a, 320b are retracted to both outsides of the pit 16b so as not to interfere with the rearrangement of the backup roll assemblies 17, 170.
Note that in this embodiment, the shift drive devices 33a, 33
Although cylinders 330a and 330b are used as cylinders 330a and 330b, it is of course possible to use other means, such as an electric mechanism using a rack and pinion, as long as the purpose of the present invention can be achieved. .

When changing the rolls, first, a new work roll assembly 1, 10 is mounted on one of the side shift buggies (for example, the one on the 32b side) and is kept on standby at the position shown in FIG. Next, the other side shift buggy 32a has a cylinder 330
a, 330b to align its center concentrically with the roll axis, then the used upper and lower work roll assemblies 1, 10 inside the housing 9, shown by chain lines in the figure, are side-shifted by the tow truck 7. Pull it out onto the buggy 32a. Next, the automatic coupler 8 is opened and the cylinders 330a, 330b are connected to the second
In the figure, the buggy 32b on the opposite side is moved backward to the upper stroke end, and the center of the new work roll assembly 1, 10 is aligned concentrically with the roll axis. Thereafter, new work roll assemblies 1 and 10 are pushed into the housing 9 using the towing cart 7 in the same procedure as in the case of the conventional apparatus, and the roll change is completed. After this, the side shift buggy 32 is
By alternately shifting a and 32b in the vertical direction in FIG. 2, roll rearrangement can be repeated.

In addition, in the apparatus of the above embodiment, the buggy 320a,
320b are independent, but the side buggies 320a, 320b of the work roll assemblies 1, 10
320b and the buggy 3 on the spindle side (not shown)
20a and 320b may each have an integral structure or may be integrally connected. In this case, either one of the shift drive devices 33a and 33b can be omitted.

<Effects of the Invention> According to the roll changing device of the present invention, independent buggies are provided at the lower part of the roll bearing boxes on both sides of a pair of upper and lower roll assemblies as side shift buggies to support the roll assemblies. As a result, the side shift buggy has an extremely compact structure, and its equipment cost is significantly reduced. Furthermore, the space of the pit in which the buggy is stored is significantly smaller than in the case of a conventional integrated buggy, making it possible to significantly reduce the amount of foundation excavation. These effects are especially great when the roll body length is long, such as in a rolling mill for wide strips.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of a rolling roll changing device of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a front view showing an example of a conventional rolling roll changing device, and FIG.
The figure is a plan view thereof. In the drawing, 1 and 10 are work roll assemblies,
2, 20 are work rolls, 3a, 3b, 30a,
30b is a work roll bearing box, 5a, 5b, 5
c ₁ , 5c ₂ , 5c ₃ , 5c ₄ , 5c ₅ , 5d are rails, 7
9 is a housing, 16b is a pit, 31 is a support stand, 32a, 3
2b is side shift buggy, 320a, 320b
is a buggy, 33a and 33b are shift drive devices, 3
7 is Pitt.

Claims (1)

[Claims] 1. Pull out a roll assembly including a roll and a bearing box that rotatably supports both ends of the roll from the rolling mill housing in a direction parallel to the roll axis, place the roll assembly on a side shift buggy, and move the roll assembly at right angles to the roll axis. In the rolling roll changing device which moves in the direction of and changes the rolls, a plurality of side shift buggies each supporting bearing boxes at both ends of the rolls of the roll assembly are provided corresponding to the number of the bearing boxes. A rolling roll changing device characterized by: