JPS6338242B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention provides a method for bending rolls of a rolling mill.
The present invention relates to a roll bending device for a rolling mill that aims at good control of plate shape.

[Conventional technology]

A conventional roll bending device will be explained with reference to FIG.

Upper and lower work rolls 1 and 2 are held in a vertically movable state in a roll housing 7 via upper and lower work roll bearing boxes 3 and 4, sandwiching a pass line through which the rolled material passes; Lower work rolls 1 and 2
Upper and lower reinforcing rolls 5 and 6 for backing up are installed above the upper work roll 1 and below the lower work roll 2, respectively.

A roll bending device for controlling the shape of a rolled material by applying bending force to the upper and lower work rolls 1 and 2 has a built-in roll housing 7 (project block). A cylinder 8 that applies a convex bending force to the upper and lower work rolls 1 and 2, and a cylinder 9 that applies a concave bending force to the upper and lower work rolls 1 and 2.
The cylinders 8 and 9 are arranged in series in the vertical height direction of the collar portions 10 provided in the upper and lower work roll bearing boxes 3 and 4.

[Problem to be solved by the invention]

However, in the above conventional structure,
In a rolling mill structure in which the lower work rolls 1 and 2 are moved in the roll axis direction, it is impossible to simultaneously move the roll bending device, the rolls, and the roll bearing box in the roll axis direction because damage to the cylinder may occur. In addition, in a six-high rolling mill, there is an increasing need for a roll bending device that can apply two types of bending force of unevenness to each of the work roll and intermediate roll, and that can move the intermediate roll in the roll axis direction. However, the arrangement described above has the disadvantage that it cannot be installed within a limited space.

The object of the present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a roll bending device for a rolling mill that can perform good control of sheet shape by effectively arranging it within a limited space. be.

[Means to solve the problem]

In order to achieve such an object, the roll bending device of the present invention applies bending force to the roll bending device of a rolling mill that applies bending force to the rolls to control the shape of the rolled material. In order to apply two types of uneven bending force to one collar of the roll bearing box, a hook member that can move up and down is provided in a space that is substantially the same in the height direction with respect to the collar of the roll bearing box. A shift block is disposed in a project block, and two bending cylinders are disposed within the shift block, and among the bending cylinders, two types of bending force are applied to one collar of the roll bearing box. One of the bending cylinders has its piston in direct contact with the collar, and the other bending cylinder has its piston in contact with the collar via a hook member provided on the shift block that is operated up and down by the cylinder. It is characterized by the following.

[Effect]

According to the above configuration, when the bending cylinder is applied, a force is applied to the bending cylinder whose piston is in direct contact with the collar of the bearing box in the direction of separating the work rolls from each other. The work rolls are given a convex shape, and on the other hand, the other bending cylinder comes into contact with the collar via a hook member provided on the shift block, so that the direction in which the work rolls are brought closer together is given the power of
The work roll is given a concave shape.

〔Example〕

Hereinafter, details of the present invention will be explained using examples shown in the drawings.

FIG. 2 is a longitudinal sectional view showing an embodiment of a roll bending device for a rolling mill according to the present invention, FIG. 3 is a partially cutaway view of FIG. FIG. 4 is a plan view of FIG. 3, in which the same parts as in FIG. 1 are given the same reference numerals.

Upper and lower work rolls 1 and 2 can be moved up and down to a project block 13 attached to a roll housing 7 via upper and lower work roll bearing boxes 3 and 4 and a shift block 11, sandwiching a pass line through which the rolled material passes. The upper and lower reinforcing rolls 5 and 6 (the upper reinforcing roll 5 is not shown), which back up the upper and lower work rolls 1 and 2, are held in the upper and lower work rolls of the upper work roll 1. They are installed on the bottom of 2.

A roll bending device for controlling the shape of the rolled material by applying bending force to the upper and lower work rolls 1 and 2 is built into the roll housing 7 (project block 13). A shift block 11 that is movable in the direction is held, and bending cylinders 8 and 9 that apply two types of bending force to the upper and lower work rolls 1 and 2 are arranged in the upper and lower directions.
It is built into a shift block 11, which is a single member and has a space that is almost the same in the height direction as the collar portion 10 of the lower work roll bearing boxes 3 and 4.

Now, to describe the shape given to the roll when the bending cylinders 8 and 9 are applied, first, the bending cylinder 8
When one of the work rolls is applied, since it is in direct contact with the collar 10 of the piston bearing boxes 3 and 4 of the cylinder 8, a force is applied in the direction of separating both work rolls from each other, and the upper and lower The work rolls 1 and 2 are given a convex shape. On the other hand, when the bending cylinder 9 is operated, the bending cylinder 9 is built into the shift block 11 by operating the cylinder 9, and is bent over the collar 10. The hook member 12 that is hung and engaged applies a force to the upper and lower work rolls 1 and 2 in the direction of approaching each other through the collar portion 10. Given. In addition, the shift block 11 clamps the upper and lower work roll bearing boxes 3 and 4 with a clamp 14 (see Fig. 4) provided on a movable member, and applies an external force, for example, from a cylinder or the like, in the roll axis direction. For example, it has a structure that allows movement in the roll axis direction.

〔Effect of the invention〕

As described above, according to the present invention, it is easy to install a roll bending device with two types of unevenness on each of the work roll of a 4-high rolling mill, the work roll of a 6-high rolling mill, and the intermediate roll, and the work roll Also, when the intermediate roll is moved in the roll axis direction, the effect that the installation of the device becomes easy can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of a rolling mill equipped with a conventional roll bending device, and FIG. 2 is a longitudinal sectional view of a rolling mill equipped with an embodiment of the roll bending device according to the present invention. Figure 3 is a partially cutaway view of Figure 2 when viewed from the A-A direction, and Figure 4 is a view of Figure 3.
FIG. 1...Upper work roll, 2...Lower work roll, 3
...Upper work roll bearing box, 4...Lower work roll bearing box, 5...Upper reinforcing roll, 6...Lower reinforcing roll, 7...Housing, 8, 9...Bending cylinder, 10...Brim portion , 11...Shift block, 13...Project block.

Claims (1)

[Claims] 1. In a roll bending device of a rolling mill that controls the shape of a rolled material by applying bending force to the rolls, unevenness 2 is applied to one collar of a roll bearing box to which bending force is applied. In order to apply different kinds of bending force, a shift block having a hook member that can be moved up and down is arranged in the project block in a space that is almost the same in the height direction with respect to the collar of the roll bearing box. Two bending cylinders are arranged in the shift block, and among the bending cylinders that apply two types of bending force to one collar of the roll bearing box, one of the bending cylinders applies its piston directly to the collar. and the other bending cylinder is brought into contact with the flange portion via a hook member provided on the shift block which is operated up and down by the cylinder. . 2. The roll bending system according to claim 1, wherein both of the bending cylinders are built into the shift block configured to be movable in the axial direction at the same time as the roll and the roll bearing box. ding device.