JPH0259005B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for winding thick materials or high tensile strength materials using a down coiler installed in a hot strip mill line or the like.

Prior Art At the most downstream position of a thin plate rolling line such as a hot strip mill line, there are a plurality of down coilers, for example, two down coilers as shown in Fig. 1, to alternately wind the hot rolled material. 10 and 12 are installed. Usually, the down coiler 10 at the end of the line is for thick materials with a thickness of 3.2 to 19 mm or high tensile strength materials, and the down coiler 10 upstream from it is
No. 2 is used for thin objects having a thickness of 1 to 12.7 mm, for example. Each of the down coilers 10 and 12 includes a mandrel 14, a wrapper roll 16 that is pressed against the mandrel 14 during winding, and a pinch roll 20 that is positioned in line with a runout table roller 18. This pinch roll consists of an upper pinch roll 20A and a lower pinch roll 20A.
It consists of B. The down coiler further includes a guide 22 provided upstream of the pinch roll,
A deflector 24 and a guide plate 26 are provided on the downstream side thereof.

The guide 22 is for guiding the rolled material to the pinch rolls 18, and the deflector 24 is for guiding the rolled material to the pinch rolls 18.
In the raised position, the rolled material is guided to the mandrel 14, and in the lowered position, the rolled material is passed further downstream to the down coiler. pinch roll 1
8 serves to deflect the rolled material towards the mandrel 14 and to apply back tension between the rolled material and the mandrel 14 so that the rolled material is tightly wound onto the mandrel 14. In FIG. 1, after the down coiler 10 has wound up the rolled material, the attached deflector is in the raised position so that the down coiler 12 can take up the rolled material.

When winding with a down coiler, as shown in Figure 2, between the mandrel and the pinch roll,
Ideally, the rolled material 28 is under tension between each of the pinch rolls and upstream thereof.
As a result, the rolled material 28 can be removed without damaging the rolled material 28.
8 can be tightly wound onto a mandrel.

The state shown in Figure 2 can almost certainly be obtained in the case of thin materials, but in the case of thick materials or high-tensile materials, the state shown in Figure 2 cannot be achieved with certainty due to the rigidity of the rolled material. First, as shown in Figure 3, the rolled material may swell just before the pinch rolls. If the rolled material swells just before the pinch rolls, the rolled material 28 may be damaged by the guide 22, or sufficient back tension will not act on the rolled material 28, making it impossible for the rolled material 28 to be tightly wound onto the mandrel. .

Therefore, for example, as shown in FIG. 4, a bending roll 30 may be installed in front of the pinch roll 20, or an additional pinch roll 32 may be installed in front of the pinch roll 20, separate from the pinch roll 18. It is possible to do so. However, these methods require extra equipment, resulting in increased equipment and maintenance costs.

Purpose of the Invention In view of the above-mentioned problems, the present invention provides a method for tightly wrapping thick or high-tensile materials while applying sufficient back tension without adding to or making major changes to existing equipment. It is an object of the present invention to provide a method for winding up hot rolled material.

Configuration of the Invention That is, according to the present invention, a plurality of down coilers each having a pinch roll on the upstream side are arranged in series, and each down coiler has a
It is designed to wind up the rolled material by applying back tension between it and attached pinch rolls, and at least one of these down coilers, excluding the most upstream down coiler, is for thick or high-quality materials. In down coiler equipment, which is a down coiler for tensile materials, when winding thick materials or high tensile materials, a pinch roll attached to at least one down coiler upstream of the down coiler for thick materials or high tensile materials is also used. There is provided a winding method using a down coiler, which is characterized in that a thick material or high tensile strength material is wound on a down coiler for thick materials or high tensile strength material while applying back tension.

Example The present invention will be described below with reference to the accompanying drawings.

The case where the method for winding a hot rolled material according to the present invention is implemented in a down coiler facility as shown in FIG. 1 will be described. Before winding the hot rolled material onto the downstream down coiler 10, as shown in FIG.
B and the deflector 24 of the down coiler 12 on the upstream side is placed in the lowered position, while the pinch roll 2 of the down coiler 10 on the downstream side
0A and 20B are also kept apart from each other, and the deflector 24 is placed in the raised position.

After the hot-rolled material passes through the upstream down coiler 12 in this manner, the pinch rolls 20A and 20B of the upstream down coiler 12 are brought into contact with each other to create a pinch state, as shown in FIG. Furthermore, when the hot-rolled material 28 passes through the pinch rolls 20 of the down coiler 10 on the downstream side, the pinch rolls 20A and 20B are brought into contact with each other to create a pinch state, and the rolled material 28 is Deflector 2
4 to guide it toward the mandrel 14, and wind it up on the mandrel 14 by the cooperative action of the wrapper roll 16 and the mandrel 14.

In this way, the down coiler 10 on the downstream side
FIG. 9 shows a state in which a thick material or a high tensile strength material is wound up and wound around the mandrel 14. As a result, the downstream down coiler 1
Since not only the pinch roll of the down coiler 0 but also the pinch roll of the down coiler 12 on the upstream side is in a pinch state, the back tension of the two pinch rolls acts on the hot rolled material 28, and the pinch roll The hot-rolled material does not bulge immediately before the hot-rolled material is tightly wound around the mandrel 14. Further, as shown in FIG. 3, the hot rolled material will not be damaged due to swelling of the rolled material just before the pinch rolls.

In the above example, before the hot rolled material is wound onto the down coiler 10 on the downstream side, as shown in FIG.
Pinch roll 20A of upstream down coiler 12
and 20B are separated from each other, however, the pinch rolls 20A and 20B of the down coiler 12 on the upstream side may be brought into contact with each other to create a pinch state when the hot rolled material is bitten.

In addition, although the above example has two down coilers, when winding thick materials or high-tensile materials when three or more down coilers are installed, the upstream side of the down coiler for thick materials or high-tensile materials should be The rolled material can be wound up while applying back tension by using the two down coilers together with the attached pinch rolls.

Effects of the Invention As described above, according to the method for winding hot rolled material of the present invention, not only the pinch rolls of the down coiler for thick materials or high tensile strength materials, but also the pinch rolls of the down coiler on the upstream side thereof are pinched. Because the back tension of two pinch rolls acts on the hot-rolled material, the rolled material does not bulge just before the pinch rolls, and the hot-rolled material is tightly wound around the mandrel. taken. Further, the hot rolled material will not be damaged due to swelling of the rolled material just before the pinch rolls.

Furthermore, the method of the present invention can be implemented using only existing equipment and is economical, requiring no new equipment costs.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the down coiler equipment, Fig. 2 is a schematic diagram showing an ideal state in which hot rolled material is caught between the pinch rolls of the down coiler, and Fig. 3
The figure is a schematic diagram showing the state in which the hot-rolled material swells just before the pinch rolls when the hot-rolled material is bitten by the pinch rolls. A schematic diagram showing a possible method for preventing the occurrence of bulges just before the pinch rolls. Figure 6 is a diagram showing the state of the pinch rolls before the hot rolled material passes through it. Figure 7 is a diagram showing the state of the pinch rolls before the hot rolled material passes through. Figure 8 shows the state of the pinch roll of the down coiler on the upstream side after passing the material through the hot rolled material. A diagram showing the state of the roll, and
FIG. 9 is a schematic view showing the state of the down coiler equipment when a thick material or a high tensile strength material is being wound up by the hot rolled material winding method of the present invention. Reference number, 10... Down coiler for thick material or high tensile strength material, 12... Down coiler for thin material, 14
...Mandrel, 16...Rattuparol, 18...Runout knurled roller, 20...Pinch roll, 2
0A...Upper pinch roll, 20B...Lower pinch roll, 22...Guide, 24...Deflector, 28...
Hot rolled material, 30... Bending roll, 32...
Additional pinch roll.

Claims (1)

[Claims] 1. A plurality of down coilers each having a pinch roll on the upstream side are arranged in series, and each down coiler applies back tension to the rolled material between it and the attached pinch roll. In down coiler equipment, at least one of the down coilers excluding the most upstream down coiler is a down coiler for thick materials or high tensile strength materials. When winding up thick materials or high tensile strength materials, the pinch roll attached to at least one down coiler upstream of the down coiler for heavy materials or high tensile strength materials is also used to apply back tension. A method for winding a hot rolled material, the method comprising winding it on a down coiler for use in commercial or high tensile strength materials. 2. Claim 1, characterized in that the down coiler for thick materials or high-tensile materials is located at the most downstream position.
A method for winding a hot rolled material as described in Section 1. 3. The pinch roll of at least one upstream down coiler used together with the down coiler for thick materials or high tensile strength materials shall be the pinch roll attached to the down coiler immediately preceding the down coiler for heavy materials or high tensile strength materials. A method for winding a hot rolled material according to claim 1 or 2, characterized in that: 4 Three down coilers are installed, and when winding thick materials or high-tensile materials, the pinch rolls attached to the two upstream down coilers are also used to apply back tension while winding thick materials or high-tensile materials. 4. A method for winding a hot rolled material according to claim 2 or 3, characterized in that the material is wound around a down coiler for thick materials or high tensile strength materials.