JPH06134505A - Cross rolling mill - Google Patents

Abstract

PURPOSE:To provide a rolling mill whose structure is simple and with which bending is loaded even during rolling by providing bending rolls with which only the middle parts in the width direction of work rolls are supported. CONSTITUTION:Beams 18, 19 which extend in the width direction 15 are disposed on and under the work rolls 12, 13 the bending rolls 22, 23 with which only the middle parts in the width direction 15 of the work rolls 12, 13 are supported through positioning cylinders 20 and journal boxes 21 are arranged so as to be freely vertically movable and both end parts are made free. Then, by vertically moving both the end parts of the work rolls 12, 13, large bending is loaded to the work rolls 12, 13 and the capacity of crown control is increased. That is, the bending amount is changed by relatively changing the relationship between the projection amount of the positioning cylinder 20 and the projection amount of the rolling-down screw 10. Further, when balance cylinders 28 are extended/contracted, the fine adjustment of bending is possible during rolling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross rolling mill.

[0002]

2. Description of the Related Art In recent years, as shown in FIGS. 5 and 6, upper and lower work rolls 1, 2 and their backup rolls 3, 4 have been adopted.
By inclining to the opposite sides with respect to the width direction 6 of the rolled material 5 in a plane parallel to the rolled material 5 (so-called pair cross), a cross type rolling machine capable of obtaining a high strip crown control capability is provided. It is being developed (Sho 60-5)
(See 1922 publication).

[0003]

However, the above conventional cross rolling mill has the following problems.

That is, when the work rolls 1 and 2 and the backup rolls 3 and 4 are crossed at the same time, although a high plate crown controllability is obtained as described above, the structure is complicated and the rolling mill is expensive. It was

Further, since the structure is complicated, it is difficult to convert an existing rolling mill into a cross rolling mill.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cross rolling machine having a simplified structure.

[0007]

According to a first aspect of the present invention, the upper and lower work rolls are inclined in a plane parallel to the rolled material to the opposite sides with respect to the width direction of the rolled material so as to be crossed. The present invention relates to a cross rolling machine characterized in that a bending roll that supports only a central portion in the width direction of the work roll and a position adjusting cylinder that raises and lowers the bending roll are provided above and below the work roll.

According to a second aspect of the present invention, the work rolls are arranged such that the upper and lower work rolls are tilted toward the opposite sides with respect to the width direction of the rolled material in a plane parallel to the rolled material so that the work rolls cross each other. Bending rolls that support only the widthwise central portion of the work rolls and position adjusting cylinders that raise and lower the bending rolls are provided above and below, and balance cylinders are provided between the work roll shaft boxes that support both ends of the work rolls. It is related to the characteristic cross rolling mill.

[0009]

The operation of the present invention is as follows.

According to claim 1, the upper and lower work rolls are crossed so that only the center portion in the width direction is supported by the bending rolls, so that the bending rolls receive the reaction force of the rolling. According to this, the work roll is bent by expanding and contracting the balance cylinder in this state.

[0011]

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

1 to 3 show a first embodiment of the present invention.

In the figure, 7 is a cross rolling mill, 8 is a housing of the cross rolling mill 7, 9 is a window portion formed on the housing 8, 10 is a screw down screw provided on the upper portion of the housing 8, and 11 is a window portion 9 It is a rocker plate arranged in the lower part of.

Further, 12 and 13 are upper and lower work rolls arranged in the housing 8 in the width direction 15 of the rolled material 14, and 16 and 17 are work roll shaft boxes for supporting both ends of the work rolls 12 and 13. Is.

Beams 18 and 19 extending in the width direction 15 are arranged above and below the work rolls 12 and 13, and a position adjusting cylinder 20 and a shaft box 21 are provided on the beams 18 and 19.
Bending rolls 22 and 23 that support only the central portion of the work rolls 12 and 13 in the width direction 15 are provided so as to be vertically movable, and both ends of the beams 18 and 19 hold the work roll shaft boxes 16 and 17. A balance cylinder 26 is interposed between the horizontal overhanging portion 24 of the work roll shaft boxes 16 and 17 and the receiving portion 25 of the beams 18 and 19.

Further, a balance cylinder 28 is provided between the work roll shaft boxes 16 and 17.

Reference numeral 29 is a cross mechanism attached to the housing 8, 30 is a wedge member fitted on one side between the housing 8 and both ends of the beams 18 and 19, and 31 is a central portion pivoted to the housing 8. Supported by a wedge member 30 at one end
And 32 are cross cylinders interposed between the housing 8 and the other ends of the links 31, and 33 is a space adjusting cylinder provided on the other side between the housing 8 and the beams 18 and 19. is there.

Next, the operation will be described.

When rolling with the cross rolling mill 7 according to the present invention, first, the cross cylinder 32 is expanded / contracted,
By adjusting the amount of fitting of the wedge member 30 between the housing 8 and both ends of the beams 18 and 19 via the link 31, the link 31 and the work roll shaft boxes 16 and 17 supported by the link 31 are adjusted. Work rolls 12, 13
Cross.

At this time, the housing 8 and the beams 18, 19
The space adjustment cylinder 33 provided on the other side between the beam 1 and
Support 8 and 19.

Then, while the position adjusting cylinder 20 is expanded and contracted to maintain the space between the upper and lower bending rolls 22 and 23 at a space corresponding to the rolled material 14 to be rolled, the reduction screws 10 are used to form the beams 18 and 19. By adjusting the positions of both ends of the work rolls 12, a predetermined rolling load is applied to the central portions of the work rolls 12 and 13 in the width direction 15 by the bending rolls 22 and 23.

In this state, when the rolled material 14 is passed between the work rolls 12 and 13, cross rolling is performed and the reaction force of the rolling is received by the bending rolls 22 and 23.

Generally, in the cross rolling, the work roll 1
By crossing 2 and 13, the roll gap can be set so that the central portion becomes narrower and the both end portions become wider, so that a high crown controllability for the rolled material 14 can be obtained. , 13
Since the center part of the width direction 15 is supported by the bending rolls 22 and 23 and both ends are free, the work rolls 12 and 1
By displacing both end portions of 3 in the vertical direction, the work rolls 12 and 13 can be bent significantly, and a higher crown control capability can be obtained.

That is, before rolling, the upper and lower bending rolls 22,
Bending is performed by relatively changing the relationship between the protrusion amount of the position adjustment cylinder 20 and the protrusion amount of the reduction screw 10 in a state in which the interval between 23 is kept at an interval corresponding to the rolled material 14 to be rolled. The amount can be varied.

If the balance cylinder 28 is expanded and contracted while the bending amount is adjusted in advance as described above, the bending amount can be finely adjusted even during rolling.

Moreover, the apparatus of the present invention has a simple structure as a rolling mill having a cross rolling ability and a bending ability, the equipment is inexpensive, and the existing rolling mill can be easily modified. It can be carried out.

FIG. 4 shows a second embodiment of the present invention, in which intermediate rolls 34 and 35 are provided between the work rolls 12 and 13 and the bending rolls 22 and 23, respectively.
In addition, except that the roll marks of the bending rolls 22 and 23 are prevented from being attached, the configuration is the same as that of the above-described embodiment, and the same action and effect can be obtained.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and the bending roll may not be crossed with the work roll, and the beams 18, 19 may be formed.
Instead of being held by the pressing screw 10 and the rocker plate 11, the same can be obtained by directly holding it by the housing 8 and lengthening the stroke of the position adjusting cylinder 20, and other points. Needless to say, various changes can be made without departing from the range.

[0029]

As described above, the cross rolling machine according to the first and second aspects of the present invention is excellent in that the structure can be simplified and bending can be applied even during rolling. It can be effective.

[Brief description of drawings]

FIG. 1 is a schematic front view of a first embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged schematic plan view of the cross mechanism of FIG.

FIG. 4 is a schematic front view of the second embodiment of the present invention.

FIG. 5 is a schematic plan view of a conventional example.

FIG. 6 is a schematic side view of FIG.

[Explanation of symbols]

 7 Cross Rolling Machine 12, 13 Work Roll 14 Rolled Material 15 Width Direction 16, 17 Work Roll Shaft Box 20 Position Adjustment Cylinder 22, 23 Bending Roll 28 Balance Cylinder

Claims (2)

[Claims] 1. A cross rolling machine in which upper and lower work rolls are tilted in opposite directions with respect to the width direction of the rolled material in a plane parallel to the rolled material so as to cross the work rolls. And a position adjusting cylinder for raising and lowering the bending roll, which supports only the widthwise central portion of the cross rolling mill. 2. A cross rolling machine in which the upper and lower work rolls are tilted in opposite directions with respect to the width direction of the rolled material in a plane parallel to the rolled material so that the work rolls cross each other. And a position adjusting cylinder that raises and lowers the bending roll, and a balance cylinder is provided between the work roll shaft boxes that support both ends of the work roll. Machine.