JPH0730161Y2 - Continuous tandem rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a continuous tandem rolling mill.

[Prior Art] A conventional continuous tandem rolling mill is a tandem rolling mill that combines a plurality of rewinders, a joining machine, an inlet shear, and an existing batch-type rolling mill in order from the upstream side. A machine, an outlet shear, and two winding machines are arranged, the coils of the rolled material are alternately rewound by the two rewinding machines, and the unwound rolled material is the same as that of the preceding rolled material. The trailing end and the trailing end of the rolled material are joined by a joining machine to be continuous, and the continuous rolled material is sequentially rolled by a plurality of rolling mills in the tandem rolling mill through the entry side shear,
The rolled material that has been rolled is cut to the required length by the shear on the outlet side and alternately wound up by two rewinders so that the rolled material is rolled continuously. .

In addition, when one of the rolls of each rolling mill that constitutes the tandem rolling mill is worn during continuous rolling of the rolling mill and replacement is required, the rolling mill remains inside the tandem rolling mill. In a continuous tandem rolling mill where rolls cannot be changed (in particular, it is often impossible with an old batch rolling mill converted to a continuous tandem rolling mill), the upstream side of the tandem rolling mill using the inlet shear Although the rolled material is cut and the rolled material is taken out from the tandem rolling mill once, when rolling is restarted after the roll is replaced, the rolled material is passed through the tandem rolling mill and wound on a winder downstream. It takes time, and therefore the operation rate and production efficiency of the tandem rolling mill are reduced.

In order to solve such a problem, there has been a continuous tandem rolling mill equipped with a tandem rolling mill that allows rolls to be changed while leaving the rolled material inside, which has improved the operating rate and production efficiency. However, in a continuous tandem rolling mill that incorporates a tandem rolling mill capable of roll exchange while leaving the rolled material inside, it is necessary to invest a large amount of capital in order to introduce the tandem rolling mill. .

Therefore, it is conceivable that the existing batch-type tandem rolling mill is continuously connected by arranging the necessary equipment on the inlet side and the outlet side of the existing tandem rolling mill, and the rolls can be exchanged while leaving the rolled material between the stands.

[Problems to be Solved by the Invention] However, in the continuous tandem rolling mill which is a modification of the existing tandem rolling mill, a roll exchanging device having a complicated mechanism is attached to the existing tandem rolling mill. Remodeling costs will be incurred.

In view of the above situation, the present invention is an inexpensive and simple means of providing a shear between arbitrary rolling mills for each rolling mill that constitutes a tandem rolling mill in which rolls cannot be exchanged while leaving rolled material between stands. Thus, when the rolling mill requiring roll exchange is located downstream of the shear, the rolled material is cut by the shear, and the rolling mill upstream of the shear leaves the rolled material, and is placed downstream of the shear. The rolling material can be taken out from between the stands of the rolling mills and the rolls can be exchanged, and the time required for stripping when resuming the rolling work after the rolls are exchanged can be greatly reduced to improve the operating rate and the production efficiency. It is an object of the present invention to provide a continuous tandem rolling mill which can be improved.

[Means for Solving the Problems] The present invention provides a plurality of rewinding machines for alternately rewinding a coil of rolled material and a rolled material that is alternately unwound from the rewinding machine downstream of the rewinding machine. A tandem rolling machine, which is a continuous joining machine and a tandem rolling machine that is provided downstream of the joining machine and is composed of a combination of rolling machines in which rolls cannot be exchanged with the rolled material remaining inside, and a tandem rolling machine, which is continuous. An outlet shear for cutting the rolled material to a required length and a plurality of winders for alternately winding the rolled material downstream of the outlet shear are provided, and the inlet side of the tandem rolling mill and the tandem rolling mill are configured. A continuous tandem rolling facility is provided between the rolling mills that are required to change rolls, at the upstream side and at the closest position to the rolling mills, each of which has a shear capable of cutting the middle part of the rolled material. Is.

[Operation] Therefore, in the present invention, when it is necessary to replace the roll of the rolling mill downstream of the shearing machine constituting the tandem rolling mill during continuous rolling of the rolling material, the rolling material is sheared. After cutting, the rolling mill upstream from the shear can be left with the rolled material left, and the rolled material can be taken out from the rolling mill downstream from the shear to perform roll exchange,
When rolling is resumed, the time required for sheet passing can be greatly reduced, and the operating rate and production efficiency can be improved.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

An unwinder 2 is provided upstream of the rolled material 1 in the line direction (arrow a in the figure).
And a rewinding machine 3 are provided, a joining machine 4 is provided downstream of the rewinding machine 3,
A looper 5 is provided downstream of the joining machine 4 so as to store the rolled material 1 so that the rolled material 1 can be fed out when necessary, a tensioner 6 for providing tension to the rolled material 1 is provided downstream of the looper 5, and an inlet shear 7 is provided downstream of the tensioner 6. The tandem rolling mill 13 in which a plurality of rolling mills 8, 9, 10, 11, 12 are combined (five stands in the figure) is provided downstream of the inlet shear 7, and the tandem rolling mill 13 has the highest frequency of roll exchange. Shear 14 upstream of rolling mills 11 and 12
The outlet shear 15 is provided downstream of the tandem rolling mill 13, and the winder 16 and the winder 17 are provided downstream of the outlet shear 15. Next, the operation will be described. The rolled material 1 is rewound by alternately using the rewinding machine 2 and the rewinding machine 3, and the rolled material 1 is rewound.
On the other hand, the leading end of the rolled material 1 and the trailing end of the rolled material 1 are joined by the joining machine 4 to make the rolled material 1 continuous. At this time, the looper 5 is joined by the joining machine 4 to the rolled material 1 on the upstream side.
The rolled material 1 stored in the inside is continuously fed while stopping the flow of the rolled material 1 to continuously send the rolled material 1 to the downstream side. The rolled material 1 sent from the looper 5 is tensioned by a tensioner 6 on the downstream side, and is passed through an inlet side shear 7 to a tandem rolling mill 13
It is rolled multiple times with the take-up machine via the outlet shear 15.
16 or the winder 17, and when the winding on one of the winders 16 and 17 is completed, the rolled material 1 is cut by the output shear 15.
Next, the rolled material 1 is wound by the other winding machines 17 and 16.

A case where the rolled material 1 is continuously changed by the tandem rolling mill 13 and the rolls are exchanged during rolling will be described.

First, when replacing any of the rolls of the rolling mills 8, 9 and 10 on the upstream side, the rolling material 1 is cut by the inlet shear 7 and the rolling material 1 is wound up on the winding machine 16 or 17. By doing so, the roll of any one of the rolling mills 8, 9 and 10 is exchanged after being taken out from the tandem rolling mill 13. This is similar to the conventional example.

Next, when replacing any one of the rolls of the rolling mills 11 and 12 on the downstream side, the rolled material 1 is cut by the shear 14 and the shear 14 is cut.
The rolling mills 8, 9, 10 on the upstream side keep the rolled material 1
By rolling with the winding machine 16 or 17, the rolled material 1 is taken out from the rolling machines 11 and 12 downstream of the shear 14, and the rolls of either of the rolling machines 11 and 12 are exchanged. At this time, in order to restart the rolling operation, the rolled material 1 is pulled out from the rolling mill 10 and the rolling mills 11, 1
2 and the tip of the rolled material 1 through the winder 16 or the winder 1
Wrap it around 7. At this time, the work such as strip passing is performed by the rolling mill 11,
Only 12 is needed, so it can be done in a short time.

Further, since the rolled material 1 extends in the line direction when rolled,
The rolling speeds of the rolling mills 11 and 12 on the downstream side increase, and therefore, the wear of the rolls, that is, the replacement frequency increases. That is, the rolls that normally need to be replaced may be considered to be the rolls of the rolling mills 11 and 12, and at least the operation rate of the tandem rolling mill 13 is provided by providing a shear in front of the rolling mills 11 and 12 on the downstream side where the rolls are most likely to be worn. Production efficiency will be greatly improved.

It should be noted that the present invention is not limited to the above-described embodiments, and that a shear can be installed between arbitrary rolling mills of the tandem rolling mill, and the number of shears is not limited to one, but if there are the most, all rolling mills can be installed. Of course, it can be installed in between, and various changes can be made without departing from the scope of the present invention.

[Advantage of the Invention] As described above, according to the continuous tandem rolling mill of the present invention, a plurality of rewinders for rewinding the coil of the rolled material alternately and a plurality of rewinders downstream of the rewinder are alternately provided. A tandem rolling machine that joins the rewound rolled material continuously, and a tandem rolling machine that is a combination of a plurality of rolling machines that are installed downstream of the joining machine and that do not allow roll replacement with the rolled material remaining inside Downstream of the machine, an output side shear for cutting the continuous rolled material into a required length and a plurality of winders for alternately winding the rolled material downstream of the output side shear are provided. Between the side and the rolling mill constituting the tandem rolling mill, a shear capable of cutting the midway portion of the continuous rolled material is provided at the upstream side and the closest position of the rolling mill where the need for roll replacement has occurred. , The rolled material upstream of the shear that cut the rolled material remains the same Since it is possible to take out only the rolled material of the rolling mill downstream from the shear and replace the rolls, it is possible to greatly reduce the time required for rolling the sheet and winding it around the winder when rolling again. Therefore, it is possible to achieve various excellent effects such as improvement of operating rate and production efficiency, low cost of remodeling, and low maintenance.

[Brief description of drawings]

The figure is an illustration of an embodiment of the present invention. In the figure, 8, 9, 10, 11, and 12 are rolling mills, 13 is a tandem rolling mill, and 14 is a shear.

Claims (1)

[Scope of utility model registration request] 1. A plurality of rewinding machines for alternately rewinding coils of rolled material, and a joining machine for joining rolled materials which are alternately rewound from the rewinding machine downstream of the rewinding machine and joining them. A tandem rolling mill, which is installed downstream of the joining machine and consists of a combination of multiple rolling mills with rolls that cannot be exchanged with the rolled material remaining inside, and a continuous rolling material is cut to the required length downstream of the tandem rolling mill. An exit side shear and a plurality of winders that alternately wind rolled material downstream of the exit side shear are provided, and further, rolls are exchanged between the inlet side of the tandem rolling mill and a rolling mill constituting the tandem rolling mill. At the position closest to the upstream side of the rolling mill where the need for
A continuous tandem rolling mill, which is provided with shears capable of cutting the middle part of continuous rolled material.