JPH01258803A - Rolling mill - Google Patents

Abstract

PURPOSE:To reduce the equipment and maintenance costs by composing a rolling mill of work rolls, intermediate rolls, and reinforcing rolls and changing use of the work rolls so that large work rolls are used in rolling for soft stocks and small work rolls are used in rolling for hard stocks. CONSTITUTION:Large work rolls 11, 12 are used in rolling for thick and soft stocks and the rolls 11, 12 are driven. As for rolling thin and hard stocks, small work rolls 34, 35 are used and intermediate rolls are driven. Support roller units 36, 37 are installed on the work roll side as a preventing means because a horizontal deflection of the rolls is generated by a reaction in a tangential line direction caused by a rolling torque when the intermediate rolls are driven. At the time of using the large work rolls 11, 12, large rigid beams 28, 29 are retracted not to interfere with guides for the rolls 11, 12. Hence, both the rolling work by rolls 11, 12 and the rolling work by the rolls 34, 35 are performable in only one rolling mill.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rolling mill that can effectively control the shape of a rolling mill, and particularly relates to a rolling mill that can effectively control the shape of a soft material by switching between a large-diameter work roll and a small-diameter work roll. The present invention relates to a rolling mill suitable for efficiently rolling hard materials.

[Conventional technology]

Conventionally, as a rolling mill that performs effective shape control.

There is a method described in JP-A No. 56-66307, in which an intermediate roll is arranged between a small-diameter work roll and a reinforcing roll, and the intermediate roll is moved vertically and axially to control the shape. It is. Also.

Another rolling mill is the one described in JP-A-60-141311, in which the work roll is reliably supported by a support roller unit from the direction in which the material to be rolled enters, and the work roll is moved in that direction. This prevents bending.

[Problem to be solved by the invention]

The former of the conventional rolling mills provides effective shape control, but the diameter of the work roll is set to 1/4 of the strip width.
If the roll strength is reduced to below, the roll strength is limited and the required rolling torque cannot be transmitted, so intermediate rolls must be driven. There was a problem that the shape was lost. Although the latter rolled material can solve these problems, it cannot be used with large-diameter work rolls. That is, all of the above-mentioned conventional techniques have a problem in that they have limitations in efficiently rolling a wide variety of products, and must be dealt with by providing rolling equipment suitable for each product.

An object of the present invention is to provide a rolling mill that can efficiently roll a wide variety of products with high quality.

[Means to solve the problem]

The above object is achieved by making it possible in the rolling mill to exchange a large diameter work roll with a small diameter work roll supported by a support roller unit for preventing horizontal deflection.

Preferably, when using a large-diameter work roll, the large rigid beam supporting the support roller unit for the small-diameter work roll is retracted so as not to interfere with the guide for the large-diameter work roll, and the specifier of the small-diameter work roll is The roll guide is configured to be retractable so as not to interfere with the support roller unit and the large rigid beam.

[Effect]

In order to efficiently roll relatively thick and soft materials, it is suitable to use conventional large-diameter work rolls and to drive the work rolls. On the other hand, in order to efficiently roll thin hard materials, it is preferable to use small-diameter work rolls. ing. When the intermediate roll is driven, horizontal deflection occurs on the work roll due to a tangential reaction force due to the rolling torque, so as a means for preventing this, a support roller unit is installed on the side surface of the work roll.

By having both types of elements coexist in one rolling mill and configured to be switchable, a wide variety of products can be rolled efficiently.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

The rolling mill of the present invention can be used by selectively replacing the large-diameter work roll and the small-diameter work roll.

Figures 1 to 3 show the state of the rolling mill when using large-diameter work rolls.
, 2, and in the roll housing, a rolling cylinder 3 for exerting rolling force is arranged at the lower part, and a pass line adjusting device 4 for correcting changes in the diameter of each roll is arranged at the upper part. The rolling rolls located in the roll housings 1 and 2 include upper and lower reinforcing rolls 5 and 6, upper and lower intermediate rolls 9 and 10 that can be moved in the roll axis direction by upper and lower roll moving devices 7.8, and upper and lower large diameter rolls. It consists of work rolls 11 and 12. The upper and lower intermediate rolls 9 and 10 are metal chocks 13.
A shift block 15.14 is supported by the intermediate rolls 9 and 1o and is moved simultaneously with the intermediate rolls 9 and 1o by the intermediate roll moving devices 7 and 8.
The bending action is performed by cylinders 17, 18 provided at 16. The large-diameter work rolls 11, 12 are supported by metal chocks 19, 20, and a bending action is performed by a cylinder 21 provided in the roll housing. In rolling operations, the rotational force of the drive motor 22 is transferred to the work rolls 11, 12 through the gearbox 23, the upper and lower spindles 24, 25, and the couplings 26, 27 that removably connect these spindles to the large-diameter work rolls. This is done by rotating these work rolls.

Upper and lower large rigid beams 28 and 29 that support the upper large-diameter work roll guide 32, the lower large-diameter work roll guide 33, and support roller units 36 and 37 (see Fig. 4) for preventing deflection of the small-diameter work roll, which will be described later. are configured to be movable forward and backward by cylinders 42 and 43 and cylinders 30 and 31, respectively. As a result, when the work roll is a large-diameter roll, the guides 32 and 33 for the upper and lower large-diameter work rolls are installed in order to arrange the guides that guide the rolled material and the roll cooling headers suitable for the large-diameter work roll. While advancing to a predetermined position, the support roller unit 3
The upper and lower large rigid beams 28 and 29 for 6.37 are retracted and put on standby, and the upper and lower large diameter work roll guides 32.
Avoid interfering with 33. At this time, support roller units 36 and 37 for preventing deflection of the small diameter work roll
Remove it.

FIGS. 4 to 6 show the state of the rolling mill when using small-diameter work rolls. In this case, coupling 2
6.27 to separate the large-diameter work rolls 11.12 from the spindle 24.25, carry these large-diameter rolls out of the roll housing 1.2, and instead move the small-diameter work rolls 34.35 into the roll housing. intermediate roll 9,
Place it between 10 and 10. In this case, the work roll can be replaced without removing the reinforcing roll from the roll housing. If the change in roll diameter is large and the equipment becomes large-scale, dummy blocks may be additionally installed for each.Support roller units 36 are installed on the sides of the upper and lower small diameter work rolls 32 and 33 to prevent horizontal deflection. .37
and large rigid beads 428, 29 are provided. The support roller unit consists of two straight rollers and one divided roller. The metal chocks 38 and 39 that support the upper and lower intermediate rolls 9 and 10 are changed in shape to fit into the shift blocks 15 and 16 because the diameters of the large and small diameter work rolls vary greatly.

Metal chock 4 supporting small diameter work rolls 34 and 35
The shape of 0.41 has been changed in the same way.

The bending cylinder or bender 21a for the small diameter work rolls 34,35 can be provided separately from the cylinder or bender 21 for the large diameter work roll. In rolling work using small diameter work rolls, coupling 2
6.27 to move the spindle 24.25 to the intermediate roll 9.
10, the drive motor 22 rotates the intermediate roll, thereby transmitting rotational power to the small diameter work rolls 34,35. When the intermediate rolls 9 and 10 are driven,
Since the work rolls are deflected in the horizontal direction due to the tangential reaction force caused by the rolling torque, support roller units 36.
37.

Guides for guiding the rolled material and roll cooling headers are placed in support roller units 36, 37 and large rigid beams 28 in order to position them appropriately for use with small diameter work rolls.
．． 29 to a predetermined position using cylinders 30, 31, etc., and the upper and lower guides 3 for large diameter work rolls.
2.33 is retracted by a cylinder etc. 42.43 and kept on standby, and these guides are connected to the support roller unit 36°3.
7 and the large rigid beams 28 and 29. The horizontal position of the small-diameter work rolls 34.35 is determined by support roller units 36.37, which are always kept in a constant position by support roller position adjusters 44.45.

As described above, according to this embodiment, the large-diameter work roll and the small-diameter work roll can be exchanged, and it is possible to roll a wide variety of products with one rolling mill.

〔Effect of the invention〕

According to the present invention, it is possible to perform rolling operations using large-diameter work rolls and rolling operations using small-diameter work rolls in one rolling mill, which has the effect of significantly reducing design and maintenance costs.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the relationship between the rolls when a large-diameter work roll is used in a rolling mill according to an embodiment of the present invention, Fig. 2 is a side view thereof, and Fig. 3 is a view of the rolling mill when a large-diameter work roll is used. 4 is a front view showing the roll relationship when using small diameter work rolls, FIG. 5 is a side view thereof, and FIG. 6 is a front view of the rolling mill when using small diameter work rolls. 1.2... Roll housing, 5,6... Reinforcement roll, 9.1o... Intermediate roll, 11.12... Large diameter work roll, 21.21a... Bender, 28.29
...Large rigid beam, 32.33...Guide, 34.
35...Small diameter work roll, 36.37...Support roller 1st barrier

Claims (1)

[Scope of Claims] 1. A pair of upper and lower work rolls capable of performing roll bending action, and upper and lower work rolls each disposed above and below the work rolls capable of performing roll bending action and in contact with the work rolls. It consists of a pair of intermediate rolls and a reinforcing roll that supports these intermediate rolls, and is configured so that the intermediate rolls can be moved in the roll axis direction, and the adjustment of the axial movement of the intermediate rolls and the reinforcement rolls that support these intermediate rolls. In a rolling mill that performs shape control by combining the bending action with the bending action of the work rolls, a large-diameter work roll is used when rolling soft materials, and a support roller to prevent horizontal deflection is used when rolling hard materials. A rolling mill characterized in that the work rolls are replaceable so that small-diameter work rolls supported by the unit can be used. 2. In the rolling mill according to claim 1, when the large-diameter work roll is used, the support roller unit and the large rigid beam supporting the support roller unit interfere with the guide for the large-diameter work roll. The rolling mill is characterized in that the guide for the large diameter work roll can be retracted so as not to interfere with the support roller unit and the large rigid beam when the small diameter work roll is used. 3. In the rolling mill according to claim 1, the large-diameter work roll and the small-diameter work roll can be separated without removing the reinforcing roll from the roll housing that accommodates the work roll, intermediate roll, and reinforcing roll. A rolling mill characterized in that it is configured to be replaceable. 4. The rolling mill according to claim 1, characterized in that the bender for the large-diameter work roll and the bender for the small-diameter work are provided separately.