JPH07136715A - Material winder for rolled stock in hot strip mill - Google Patents

Abstract

PURPOSE:To provide a material winder for the rolled stock of a hot strip mill being allowed to smoothly bite and coil a strip. CONSTITUTION:A pinch roll 7 whose upper roll 7a is offset by a specified quantity on the downstream side, is arranged in front of a material winder, and a pinch roll 2 whose upper roll 2a is offset by a specified quantity on the upstream side, is arranged on the upstream side of this pinch roll 7. Consequently, the diaphragming and the double bending of a strip, are prevented, and a satisfactory product coil can be attained. Also, the remarkable improvement of an yield, can be attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for winding rolled material in a hot strip mill.

[0002]

BACKGROUND OF THE INVENTION A strip winding device for a hot strip mill is disclosed in, for example, Japanese Patent Laid-Open No. 58-77717.
JP-A-5-69040 and JP-A-5-69040, a pinch roll that plays a role of guiding a strip front end before a winder and holding a back tension after a strip tail end passes through a finishing rolling mill, and a strip. Immediately before the side guide, which plays the role of centering, the strip tip absorbs the slack of the strip on the hot run table before the strip tip wraps around the winder, and the strip tail end retains the back tension after leaving the finishing mill. It is disclosed that a pinch roll is arranged.

[0003]

The problems in the above-described conventional rolling material winding device for each hot strip mill are as follows.
Particularly, after the tail end of the strip has passed through the finishing mill, in the pinch roll arranged immediately before the side guide, the strip forms a loop 8 on the front surface of the pinch roll 2 as shown in FIG. 2, for example.

As a result, the strip bites into the pinch roll 2 at an angle, resulting in squeezing, or the loop of the strip is folded into two and bites into the pinch roll, resulting in harmful defects in the product. Let

The present invention solves this problem, and provides a rolling material winding device for a hot strip mill which smoothly bites and winds a strip.

[0006]

Means for Solving the Problems A feature of the present invention is that in a hot strip mill, a pinch roll (hereinafter, referred to as a pinch roll in which an upper roll is offset by a predetermined amount to a winder side before a winder is a downstream side. No. 1 pinch roll) is arranged, and an upper roll is arranged upstream of this pinch roll, that is, a pinch roll offset by a predetermined amount to the finish rolling mill side (hereinafter referred to as No. 0 pinch roll). It is a rolling material winding device in a hot strip mill characterized by being installed.

[0007]

The feature of the apparatus of the present invention is that, as shown in FIG. The upper roll 2a of the 0 pinch roll 2 is offset upstream by a predetermined amount, for example, 2 to 100 mm, and when the upper roll 2a holds the strip S, the strip S on the entry side is pushed downward from the pass line P. .

The upper roll 2a acts to eliminate the free-tension strip loop 8 shown in FIG. No pinch roll 2 is prevented from biting, and no narrowing due to this is caused, and the loop of strip S is folded into two sheets. It is possible to prevent biting into the 0 pinch roll 2 and eliminate harmful defects in the product.

[0009]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a known rolled material winding device. The strip rolled to a desired thickness and width by the finish rolling mill 1 is cooled to a target winding temperature on the hot run table 3. After that, it is wound into a coil by a winding machine 4 provided subsequently.

In this embodiment, side guides 5 and 6 functioning as the centering of the strip are provided in front of the winder 4 in order to secure a coil having a good winding shape.
Between the side guides 5 and 6, a drive type No. 0 pinch roll 2 is installed, and a drive-type N is provided on the exit side of the side guide 6.
o. One pinch roll 7 is provided to play a role of pinching guide of the strip front end or pinching guide after passing the front end and holding back tension after the strip tail end passes through the finishing rolling mill.

No. The 0 pinch roll 2 offsets the large-diameter upper roll 2a to the upstream side, that is, to the finish rolling mill side by 8 mm, and the large-diameter upper roll 2a and the small-diameter lower roll 2b have flat roll curves that are preferable for straight straight plate. Or have a concave crown in the central region.

No. The 1-pinch roll 7 offsets the large-diameter upper roll 7a to the downstream side, that is, the winder side by 200 mm, and the large-diameter upper roll 7a and the small-diameter lower roll 7b have a roll curve with a convex shape suitable for strip centering. To do.

In this rolling material winding device, the strip S was wound into a coil, but the strip No.
No. 0 pinch roll 2 The strip loop generated on the front surface is bitten diagonally and narrowing occurs, or the loop of the strip S is folded into two and the No. A good product coil could be stably obtained without being caught in the 0 pinch roll 2.

[0015]

As described above, according to the present invention, the upper roll of the pinch roll before the winder is offset to the downstream side by a predetermined amount, and the upper roll of the pinch roll on the upstream side is offset to the upstream side by a predetermined amount. By arranging in such a manner, it is possible to prevent narrowing of the strip and breakage of the two strips and to stably obtain a good product coil, improve the coil winding form and prevent harmful defects from occurring, resulting in a large yield. It is possible to improve.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of a conventional rolled material winding device arrangement.

FIG. 2 No. It is a schematic side view which shows the state of the strip of the 0 pinch roll front surface.

FIG. It is a schematic side view which shows arrangement | positioning and operation of 0 pinch roll.

[Explanation of symbols]

 1 Finishing mill 2 No. 0 Pinch roll 3 Hot run table 4 Winder 5, 6 Side guide 7 No. 1 pinch roll 8 strip loop S strip P pass line

Claims (1)

[Claims] 1. In a hot strip mill, an upper roll is provided with a pinch roll offset by a predetermined amount downstream before a winder, and a pinch roll by which the upper roll is offset upstream by a predetermined amount is provided upstream of this pinch roll. A rolled material winding device in a hot strip mill, which is provided with rolls.