JPS63119914A - Multistage rolling mill - Google Patents

Abstract

PURPOSE:To easily and always stably perform supporting work rolls and controlling shapes by forming the bearing blocks of split rolls to be exchanged and fitted according to the diameters of the work rolls to enable inserting into thrust blocks of split rolls and fitting and supporting them by sharing guides. CONSTITUTION:Intermediate rolls 7, 7' and large diameter work rolls 18, 18' supported by these are disposed between upper and lower stay rolls 1, 1'. Furthermore, the rolls 18, 18' are supported capable of horizontal bending by the split rolls 13, 13' through single supporting rolls 19, 19'. At the time of exchanging the work rolls, the upper and lower rolls supporting blocks 4, 4' incorporating each roll are opened by operating a clearance adjusting device 2 and the rolls 19, 19' are detached together with the rolls 18, 18' and the bearing block 22. Then, the minimum diameter work roll (figure is omitted) is set and the large diameter supporting roll making the rolls 7, 7' to support it is set together with its bearing block. This bearing block is inserted and supported sharing with the guide 23 of the thrust block.

Description

[Detailed Description of the Invention] [Industrial Application Fields] The present invention is applicable to difficult-to-process materials, ultra-thin materials, high-strength materials, high-alloy steel, etc.
The present invention relates to a multi-high rolling mill that can produce materials that have conventionally been difficult to roll with high quality and high productivity at reduced costs by changing the work roll diameter to an arbitrary diameter.

[Prior Art] Fig. 5 shows an example of a multi-stage rolling mill using extremely small diameter work rolls that has been considered in recent years. l°
In between, there are roll support blocks 4, 4° whose vertical position can be adjusted along the housing 3 by the spacing adjustment device 2, and which can be inserted into and pulled out from the housing 3 in the roll axis direction.
The backing roll 1. is provided in the chock support block 6.6° provided in the opening 5 formed in the center of the plane of each roll support block 4, 4°. Chock 8.8° with intermediate roll 7.7° backed up to lo
is supported via a vertical bending cylinder 9.

Further, a very small diameter work roll 10.10° is arranged between the intermediate rolls 7.7°, and the very small diameter work roll 1
On both sides of the moving direction of each material 11 of 0.10', there are two support rolls 14 that are divided into a plurality of rolls in the width direction and supported on a common shaft 12. .15. A plurality of horizontal bending devices 16.16° arranged at 14° and 15° and provided on the roll support block 4.4° push the pressing block 17.
The horizontal bending control and offset control of the extremely small diameter work roll 10.10' are performed by changing the pressing amount of the divided roll 13.13° in the width direction.

[Problems to be solved by the invention] However, in the above conventional system, the extremely small diameter work roll 1
In order to horizontally bend 0.10° in a narrow space, two extremely small diameter support rolls 14, 15, 1 are used.
The pressure is applied by the split rolls 13° and 13° through the support rolls 1
4, 15. 14° and 15° tend to bend, making it impossible to stably support the extremely small diameter work roll 10.10°, resulting in extremely unstable shape control. .

The present invention was made by focusing on the above-mentioned conventional problems.
The purpose is to easily change the support type of the work roll according to changes in the diameter of the work roll, and to always perform stable support and shape control.

C. Means for Solving Problems] The present invention attempts to solve the above technical problems, and
Upper and lower roll support blocks each having an intermediate roll and a split roll that supports the work roll supported by the intermediate roll so as to be horizontally bendable via the support roll;
In a multi-stage rolling mill that is vertically adjustable with respect to the housing and can be pulled out in the axial direction of the roll, depending on the diameter of the work roll, a support roll for directly supporting the work roll on the intermediate roll and a work roll are used. A multi-stage rolling mill characterized in that each of the support rolls supported by the intermediate roll via the support roll is provided with a bearing block that can be fitted and supported in common with the guide formed in the pressing block of the divided rolls. .

[Function] Therefore, in the present invention, the support roll is supported by changing the model according to the diameter of the work roll by fitting the guide provided on the split roll in common. Equipped with a bearing bracket for support, the support roll can be easily replaced and the multi-high rolling mill can be changed to a multi-high rolling mill with a work roll support type according to the diameter of the work roll, providing stable support and shape control. It can be carried out.

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

FIG. 1.2 shows an example of the present invention applied to the conventional multi-high rolling mill shown in FIG. 5, and the same reference numerals in the figures represent the same parts.

Figure 1.2 shows the case where normal rolling is performed using relatively large diameter work rolls of 18.18°. In this case, a large space can be secured between the intermediate rolls of 7.7°, so A single support roll 19 with a relatively large diameter
．． Split roll 13 from the upstream and downstream sides of the material through 19°.
13' can be pressed, and therefore the large diameter work roll 1
8. Stable support of 18 degrees and horizontal bending are possible.

As shown in FIG. 2, the large-diameter work roll 18.18' is rotatably supported at its shaft end by the roll support block 4.4' by a presser roller 21 that presses it via a presser cylinder 20. Moreover, the single support roll 19, 19' has a bearing block 2 provided at its shaft end.
2 is supported by being removably fitted into a guide 23 provided on the pressing block 17 of the split roll 13°13°. 24 in the figure is the large diameter work roll 18.18
A shift cylinder is shown for shifting the rotation angle relative to the roll support brackets 4, 4'' in the roll axis direction.

In the above configuration, when using extremely small diameter work rolls for rolling difficult-to-process materials, etc., the rolls are rearranged as follows.

First, the upper and lower restraint rolls 1, 1° are opened, and the row seat support blocks 4, 4° are pulled out from the housing 3 in the roll axis direction.
．． By widening the interval of 4゛, the interval of intermediate rolls is increased by 7.7 degrees, and the presser roller 21 is further increased by the presser cylinder 20.
Move back and remove the large diameter work roll 18.18°.

Subsequently, by removing the bearing block 22 from the guide 23, all single support rolls 19.about.19.degree. are removed.

Thereafter, as shown in FIG. 3, the mill is changed to a multi-high rolling mill using extremely small diameter work rolls.

That is, as shown in FIG. 4, a large-diameter support roll 25° and 25° that fits into the guide 23 and has a relatively large diameter is connected to both the intermediate roll 7.7° and the split roll 13.13°. Bearing block 2B formed so that it can be supported in a state where
The large-diameter support rolls 25, 25° can be supported by fitting the bearing block 26 into the guide 23. 27 is the bearing block 22
．． A spring is shown for keeping 28 in the fitted state with guide 23.

Subsequently, between the upper large diameter support rolls 25 and 25,
And the very small diameter work roll 10.10' is arranged so as to be supported between the lower large diameter support rolls 25° and 25°.

In the above, the single support roll 19, L9 in FIG.
The large diameter support roll 25.25° shown in Figure 3 is divided into 13 parts due to the difference in diameter and the difference in the pressing support method.
, 13 degrees, so that the bearing block 26 has an abbreviated shape in the illustrated case. 27
shows a spring that attracts and supports the bearing blocks 22, 28 to the guide 23.

As described above, by supporting the very small diameter work roll 10.10' between the two large diameter support rolls 25.25° supported by the intermediate roll 7.7°, the very small diameter work roll 1G and 10° can be firmly supported to increase its rigidity, and the bending can be arbitrarily controlled by the bending operation of the large diameter support rolls 25 and 25° using the split rolls 13 and 13° to achieve stable shape control. be able to.

Further, the bearing block 22 of the single support roll 19.19' and the bearing block 26 of the large diameter support roll 25.25° are connected to the pressing block 1 through a common guide 23.
7 can support reclassification, so
If the diameter of the work roll is large, the roll can be easily changed to the model shown in Figure 1, and if the diameter of the work roll is small, the roll can be easily changed to the model shown in Figure 3. As a multi-high rolling mill, stable rolling and shape control can be performed.

Note that the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, according to the multi-high rolling mill of the present invention, the support roll whose type is changed according to the diameter of the work roll for support, and the guide provided on the split roll can be used in common. Equipped with a bearing bracket that supports the support rolls by fitting them together, the support rolls can be replaced to easily convert to a multi-high rolling mill with a work roll support type that corresponds to the diameter of the work rolls. As a result, the excellent effect of stably supporting and controlling the shape of the work roll can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
3 is an explanatory diagram showing a state in which the rolls have been rearranged from the embodiment shown in FIG. 1, FIG. 4 is an explanatory diagram showing details of the bearing block and guide section, FIG. 5 is an explanatory diagram of a conventional multi-high rolling mill equipped with extremely small diameter work rolls. 1.1° is a backing roll, 2 is a spacing adjustment device, 3 is a housing, 4 and 4° are roll support blocks, 7.7" is an intermediate roll, 10.10' is an extremely small diameter work roll, 13° 13°
is a split roll, 1B, 1[i' is a horizontal bending device, 17 is a pressing block, 18.18° is a large diameter work roll, 19.19° is a single support roll, 22 is a bearing block, 23 is a guide, 25. 25° indicates a large diameter support roll, and 26 indicates a bearing block.

Claims (1)

[Claims] 1) The upper and lower roll support blocks each having an intermediate roll and a split roll that supports the work roll supported by the intermediate roll so as to be horizontally bendable via the support roll can be vertically adjusted with respect to the housing in the roll axis direction. In a multi-high rolling mill that can be pulled out, depending on the diameter of the work roll, a support roll is used when the work roll is supported directly on the intermediate roll, and a support roll is used when the work roll is supported on the intermediate roll via the support roll. A multi-high rolling mill characterized in that each of the support rolls is provided with a bearing block that can be fitted and supported in common with a guide formed in the pressing block of the split roll.