JPS6328683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides that, in an axle box that supports a roll,
The present invention relates to a roll bending method and an apparatus for applying a roll bending action to the roll.

An example of a conventional rolling mill will be explained with reference to Fig. 1. In the figure, a is a housing, b is a block fixed to the housing window, c is a pair of upper and lower work rolls, d supports work roll C, and there is a gap between blocks B. The work roll axle box is fitted in such a way that it can be raised and lowered freely, and e is a bending cylinder that also serves as a balance cylinder.

In the above rolling mill, when the diameter of the work roll c changes, the center position of the work roll c moves up and down, and therefore the stroke of the bending cylinder e changes.
For this reason, in the rolling mill mentioned above, the piston of the bending cylinder must be made long to some extent so that bending can be performed even if the work roll diameter changes due to wear and the stroke changes, and the roll shaft box must be made long. When the roll moves in the axial direction, a bending action is applied to the piston. Therefore, there is a risk that the piston will become distorted and will not be able to apply sufficient bending force to the rolls.Also, if the piston is shortened to prevent distortion, the axle box will come into contact with the block due to wear of the rolls, causing the shape of the rolled plate to deteriorate. There were problems such as uncontrollability.

The present invention has been made in view of the above-mentioned points of view, and is intended to prevent the stroke of a bending cylinder from changing even if the roll diameter changes. The present invention relates to a method and apparatus for bending the rolls by supplying pressurized oil to a bending cylinder disposed between a bending shaft box and a bending shaft box.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

2 and 3 show a first embodiment of the present invention, in which an arm 2a extending to the side of the rolling mill is integrally fixed to an axle box 2 that rotatably supports a work roll 1, so that the planar shape is As shown in Fig. 2, the bending machine is formed into a substantially U-shape, and the axle box 2 is fitted into the window part of the housing 3 so as to be able to rise and fall freely, and a bending cylinder 4 is provided perpendicular to the end of the shaft of the work roll 1. A groove 2b in which the axle box 5 is fitted and a piston of the bending cylinder 4 is provided in the arm 2a.
Abut against the upper or lower surface of. Further, in the figure, 6 is a balance cylinder, and 7 is a presser plate that presses down the collar 2c provided on the arm 2a, and no collar is provided on the axle box on the opposite side of the work roll 1 from the figure.

When rolling is performed, pressure oil is supplied to the bending cylinder 4 to impart a desired bending curve to the work roll 1, and the work is performed. Even if the diameter of the work roll 1 changes due to roll wear etc., the axle boxes 2 and 5
Since the relative positional relationship between the bending cylinder 4 and the bending cylinder 4 does not change, the bending cylinder 4
There is no need to change the stroke.

4 and 5 show a second embodiment of the present invention. In the previous embodiment, the work roll 1 is bent in the vertical direction, but in this embodiment, the bending is applied in both the vertical and horizontal directions. This is an example of giving . That is, a polygonal (octagonal in the embodiment) hole 8 is bored in the arm 2a of the axle box 2, and the bending axle box 5 is fitted into the hole 8.
The tip of the piston of a bending cylinder 4a provided at an angle in the bending shaft box 5 is brought into contact with the slope of the hole 8. 9 in the figure is an actuator that controls the attitude of the axle box 5.

When pressure oil is supplied to the bending cylinder 4a, the work roll 1 is bent both vertically and horizontally, so that the shape can be controlled even better. Even with such a configuration, even if the diameter of the work roll 1 changes, the axle boxes 2, 5,
The relative positional relationship of the bending cylinders 4 does not change, and therefore the stroke of the bending cylinders 4 does not change.

6 and 7 show a third embodiment of the present invention, in which a bending cylinder 4b is arranged horizontally so as to give horizontal bending to the work roll 1.
The piston b is in contact with the wall surface of the groove 2b. Even with such a configuration, the stroke of the bending cylinder 4b does not change even if the diameter of the work roll 1 changes. The bending reaction force is supported by the housing 3.

8 and 9 show the fourth embodiment, and this embodiment is an example in which the stroke of the bending cylinder does not change even in a rolling mill in which the work roll 1 can be shifted in the axial direction. . That is, a bending cylinder 4 is provided by fitting an axle box 2 that supports a work roll 1 to a support bar 10 that is attached to a window portion of a housing 3 so as to be able to move up and down so that it can move in the axial direction together with the work roll 1. As in the case of the first embodiment, fit the bending axle box 5 into the groove 2b of the arm 2a,
A roll shift device 11 attached to one end of the support bar 10 is connected to the shaft end of the work roll 1.

When shifting the work roll 1, the work roll 1 is moved in the axial direction by the roll shift device 11. During this movement, the axle boxes 2 and 5 also move integrally with the work roll 1. When giving a bending curve to the work roll 1, pressure oil is supplied to the bending cylinder 4. Even if the diameter of the work roll 1 changes, the stroke of the bending cylinder 4 does not change. The support bar 10 receives the reaction force of the bending load, maintains the attitude of the axle box 2, and moves up and down in response to roll wear.

FIG. 10 shows a fifth embodiment of the present invention, in which an axle box 2 is fixed to a support bar 10 and integrated therewith. When the roll shift device 11 is provided to shift the work roll 1 in the axial direction, the support bar 10 also moves integrally. In this case,
The guide member shown at the right end of the support bar 10 is not provided.

In the above embodiment, the case of a roll bending device of a rolling mill was exemplified, but for example, a roll bending device for tension distribution control described in Utility Application No. 52-10374 (Utility Model Application No. 53-106738) is used. It can also be used in dewing equipment, non-ferrous pinch rolls, etc.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and that, for example, the embodiment shown in FIGS. 4 and 5 can be made shiftable as shown in the embodiment of FIG. The present invention can be connected to a device, the bending cylinder can be provided on the arm of an axle box having a U-shaped planar shape, and various other changes can be made without departing from the gist of the present invention. Of course.

According to the roll bending method and apparatus of the present invention, the stroke of the bending cylinder does not change even if the roll diameter changes, so the piston can be made to the optimum length, and this prevents the piston from becoming twisted. The shape of the rolled material can be sufficiently controlled without bending, and the roll itself is bent by the shaft box provided on the roll, the bending shaft box, and the bending cylinder provided between them. Various excellent effects can be achieved, such as more complex shape control and improved product quality.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional device, Figs. 2 and 3 are explanatory diagrams of a first embodiment of the present invention, Fig. 2 is a plan view, and Fig. 3 is a view taken in the - direction arrow of Fig. 2. , 4 and 5 are explanatory diagrams of a second embodiment of the present invention, in which FIG. 4 is a plan view, FIG. 5 is a view taken along the VV direction of FIG. 4, and FIGS. The figures are explanatory diagrams of the third embodiment of the present invention, where Fig. 6 is a plan view and Fig. 7 is the same as Fig. 6.
The direction arrow view, FIGS. 8 and 9 are the fourth views of the present invention.
FIG. 8 is a plan view of the embodiment, FIG. 9 is a view taken in the direction of the arrow in FIG. 8, and FIG. 10 is a plan view of a fifth embodiment of the present invention. In the figure, 1 is a work roll, 2 is an axle box, 2a is an arm, 4, 4a, 4b are bending cylinders,
5 indicates a bending axle box.

Claims (1)

[Scope of Claims] 1. Pressure oil is supplied to a bending cylinder disposed between an extension provided on an axle box that supports a roll and a bending axle box fitted to the roll, so that the roll can be bent. A roll bending method characterized by imparting bending. 2. An axle box that supports the roll and is movable up and down with respect to the housing, a bending axle box that is fitted into an extension provided on the axle box and fitted to the roll, and the bending axle box and the axle box extension. 1. A roll bending device comprising: a bending cylinder that moves a bending shaft box in at least one of vertical or horizontal directions to apply roll bending to the roll.