JPS5946685B2 - Roll rolling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll rolling device, and particularly has a triple-layer (three stages) or more roll arrangement, and after the material to be rolled is rolled, it is reversed and passes through the roll device again. The present invention relates to a roll rolling device having a structure.

Conventionally, when rolling a material to be rolled, such as an endless steel strip, first, as shown in FIG. Then, tension is applied to the steel plate 6 and the steel plate 6 is rotated.

Then, between the tension rolls 2 and 4, the work rolls 8, 10 and the backup rolls 12, 1
The steel plate 6 is rolled using a four-layer roll consisting of four rolls.

However, in this type of rolling equipment, it is necessary to pass the work roll 10 and backup roll 14 through the loop of the endless steel plate 6, and in addition, since the backup roll 14 is large, its bearings, drive motor, etc. are also large. As a result, the mechanism for passing the endless steel plate 6 through it has become extremely complicated, and its operation is also not easy, so this device cannot be said to be suitable for mass production.

Further, compared to such a device, there is a seven-layer roll shown in FIG. 2 that makes it easier to attach and detach the endless steel plate 6.

This device applies tension to the endless steel plate 6 by a work roll 20 and a tension roll 22, and works the work roll 20 by a work roll 30 supported by a backup roll 26° 28 and a work roll 36 supported by backup rolls 32 and 34. This device applies pressure from both sides and rolls the steel plate 6 at two locations.

Although this device has a reasonable structure and allows easy attachment and detachment of the endless steel plate 6, it has a drawback in that it is extremely difficult to control the rolling load.

That is, since the endless steel plate 6 is rolled at two locations, the work rolls 20 and 30 and 20 and 36, the rolling load applied to the work roll 30 by the backup rolls 26 and 28 is equal to the rolling amount (or Therefore, the rolling force is controlled to obtain the desired plate thickness while taking into account the consumption of the rolling force at the two rolling sections mentioned above, and the back-up roll 2
6 and 28, but this operation is extremely difficult.

Moreover, the shape and properties of the rolled material rolled by the work rolls 20 and 30 immediately become the previous shape of the material rolled by the work rolls 20 and 36, and
The shape and properties of the rolled material rolled in step 6 are the same as the work roll 20.
and 30 form the pre-shape of the rolled material, so controlling the shape of the material to be rolled by the load applied by the backup rolls 26 and 28 takes into account the mutual influence of the two rolling parts. This would be an operation that would be nearly impossible in reality.

Furthermore, due to the unbalance between the slip ratio of the work loaf 20.30 and the rolled material and that of the work roll 20.36, the reversed portion of the rolled material (work roll 2
0 winding also causes the problem that the portion 38 is likely to become loose.

Furthermore, in order to increase the flatness of the endless steel plate 6, it is common to apply a tensile force F to the steel plate 6 using a tension roll 22.

In such a case, the work roll 20 is deflected in the direction of the tension roll 22 due to the tensile force F.
This makes it impossible to improve the thickness accuracy of the endless steel plate 6.

The present invention has been made in view of the above circumstances, and does not impair the advantage of allowing the material to be rolled to be easily attached to and detached from the rolling mill, and also enables easy and clear setting of rolling conditions. The object of the present invention is to provide a rolling device that can improve the rolling precision of products.

In order to achieve this object, the present invention runs a predetermined rolled material around one of a pair of opposing work rolls so that its running direction is reversed, while In a rolling apparatus that applies a predetermined rolling operation to the material to be rolled between work rolls, at least the surface of the backup roll that backs up the work roll involved in reversing the material to be rolled is coated over the entire circumference. A concave groove with a predetermined depth and a width greater than the width of the rolled material is provided, and the rolled material receives no load at all when passing between the work roll and the backup roll, or a load smaller than the rolling load. The feature is that it is configured so that it receives only

By doing so, the present invention performs an extremely simple operation in which the rolling load is applied only to one location on the rolled material that is made to run in reverse, and the rolling conditions can be set easily and clearly. It has excellent advantages such as stabilizing the control of the rolling load, significantly improving the flatness and straightness of the product, and increasing the dimensional accuracy. Thus, it was possible to provide a roll rolling device that also has the effect of making it easy to attach and detach the roller.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, two or three embodiments of the roll rolling apparatus according to the present invention will be explained in more detail based on drawings.

First, the apparatus with the four-roll structure shown in FIG. 3 consists of a pair of work rolls 42 and 44 and backup rolls 46 and 48 that respectively reinforce them. An endless steel plate 40, which is a material to be rolled, is The hook is passed between a tension roll (not shown) and rotated.

As shown in FIGS. 4 and 5, the surface of the backup roll 46 that reinforces the work roll 42 that reverses the endless steel plate 40 is larger than the width and thickness of the endless steel plate 40. Width B, 4 depth D
A groove 50 with a groove 50 is provided along its entire circumference.

Therefore, due to the rolling operation using this four-layer roll structure, the endless steel plate 40 receives a rolling load between the work rolls 42 and 44, but after being reversed, the work roll 4
2 and the backup roll 46, when passing between
Since it passes through the groove 50, it is not subjected to rolling load at all.

The backup roll 46 has a surface 5 other than the groove 50.
2, the work roll 42 is backed up to support the load.

Therefore, unlike in the past, the endless steel plate 40 is not rolled at two locations, so the backup roll 4
The rolling load of 8 is extremely simple and controlled with a clear purpose of rolling only one place between the work rolls 42 and 44.

Since a stable rolling load is applied to the endless steel plate 40, the flatness and straightness of the steel plate 40 after rolling are much better than those according to the prior art.

Further, the groove 50 is formed in the endless steel plate 4 during rolling operation.
It also has the effect of being able to function as a guide device on the roller exit side to prevent the meandering phenomenon in which the roller moves left and right.

Next, another embodiment of the roll rolling apparatus according to the present invention will be described based on FIG. 6.

This device inserts a small diameter roll 54 into a large diameter roll 56 and 5 from both sides.
The large diameter roll 58 is provided with grooves 50 along the entire circumference, similar to those in the previous embodiment.

Therefore, since the rolling load acts on the endless steel plate 40 that is being reversed at one location, stable rolling control is possible without impairing the ease of attaching and detaching the rolled material, as in the previous embodiment.

Note that here, the small diameter roll 54 and the large diameter roll 56 serve as work rolls, and the large diameter roll 58 serves as a backup.

Further, FIG. 7 shows yet another embodiment of the present invention.

This device consists of a pair of work rolls 60°62 and two pairs of backup rolls 64, 66 and 68, 7 from above and below, respectively.
The backup roll 68 has a concave groove 50 similar to the previous embodiment, and the backup roll 70 has a concave groove 72 with a deeper groove depth. Each is provided.

This embodiment is also completely different from the previous embodiments in that the rolling load acting on the reversing endless steel plate 40 is only at one location, and it is extremely easy to control the rolling load, and it is easy to attach and detach the rolled material. A similar effect is produced.

In addition, in this device, a part of the lateral tension of the endless steel plate 40 acting on the work roll 60 is received by the backup roll 70, so compared to the case of the seven-layer roll device shown in FIG. , a particular effect arises in that the work roll 60 becomes much more stable and is less susceptible to deflection.

Note that the deep groove of the concave groove 72 of the backup roll 70 is
It is provided so as not to interfere with making the direction of the return path of the endless steel plate 40 parallel to the direction of the outgoing path during reverse cutting.

In addition, in the above-mentioned embodiments, devices with triple, quadruple, and six-layer roll structures were explained, but the present invention is not limited to these examples, and generally, devices with triple-layer, quadruple-type, and six-layer roll structures are described. The present invention can be applied to rolling equipment.

Furthermore, an example was shown in which the concave groove 50 provided all around the surface of the backup roll had a width B and a depth D that were larger than the width and thickness of the endless steel plate 40, respectively. In general, it may have a width at least equal to the width of the endless steel plate 40, and even if the depth D of the groove is smaller than the thickness of the steel plate 40, the rolled material passing through the groove 50 is The present invention can be applied to cases where the depth is such that only a load smaller than the rolling load is received.

However, the depth of this groove is either slightly deeper than the thickness of the endless steel plate 40 within a range that does not impair the rigidity of the backup roll, or a certain depth within the elastic range of the steel plate 40 even if a rolling load is applied in the groove. It is desirable that it be formed within a range.

Furthermore, instead of the above-mentioned endless steel plate 40, the present invention can also be applied to a normal non-endless steel strip plate.

In addition, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the spirit thereof.

As described in detail above, the present invention provides specific grooves for predetermined rolls in a rolling mill having a structure in which the rolled material is reversed, thereby maintaining ease of attachment and detachment of the rolled material. , which greatly simplifies the setting of rolling conditions,
The major feature of this method is that it allows high-precision, high-quality rolled products to be easily produced.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a conventional endless steel plate rolling mill with a four-layer roll structure, and FIG. 2 is a side view showing the same conventional rolling mill for steel plates with a seven-layer structure. 3 is a schematic side view of an apparatus having a four-layer roll structure according to the present invention, FIG. 4 is a perspective view showing the main parts of FIG. 3, and FIG. 5 is a front sectional view of FIG. 4. FIG. 6 is a schematic side view of a triple roll structure device as another embodiment of the present invention, and FIG.
FIG. 2 is a side view of an apparatus having a heavy roll structure. 6.40: Endless steel plate (rolled material), 42°44.
54, 56, 60, 62: Work roll, 46.48.
56.5B, 64, 66.68° 70: Backup roll, 50, 72: Concave groove.

Claims (1)

[Claims] 1. A predetermined material to be rolled is caused to run around one of a pair of opposing work rolls so that its running direction is reversed, while the material to be rolled is moved between the pair of work rolls. In a rolling device configured to apply a predetermined rolling operation to a material, the surface of a backup roll that backs up a work roll involved in reversing the material to be rolled has a width at least equal to or greater than the width of the material to be rolled over the entire circumference. A concave groove with a predetermined depth is provided, and the rolled material is not subjected to any load when passing between the work roll and the backup roll, or
Alternatively, a roll rolling device is characterized in that it receives only a load smaller than the rolling load.