JP2975186B2 - Rolled material winding device in hot strip mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art With regard to a device for winding a strip in a hot strip mill, see, for example, Japanese Patent Application Laid-Open No.
In the publication, a pinch roll that plays a role of guiding the leading end of the strip before the winding machine and holding the back tension after the tail end of the strip has passed through the finishing mill, and a side guide that plays a role of centering the strip. ,
It is disclosed to dispose a pinch roll that serves to absorb the slack of the strip on the hot run table and retain the back tension after the strip tail exits the finishing mill before the strip tip winds around the winder. I have.

In Japanese Patent Application Laid-Open No. 58-205614, a winding device in which a rolled material is sandwiched between upper and lower pinch rolls and wound on a mandrel in a coil shape, a lower pinch roll is formed into a middle-high crown, and an upper pinch roll is formed. There is a disclosure in which the irregularity of the edge in coil winding is improved by forming a lower middle crown into a gentler curve than the middle-high crown curve.

[0004]

However, it is necessary to prevent the strip from meandering on the hot run table in order to improve the winding shape of the coil and wind up the tight coil. The present invention provides a winding device that eliminates strip edge damage by preventing the strip from meandering.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a hot strip mill line having a No. No. 1 offset pinch roll is placed, and no. No. 0 pinch roll. In the strip winding device which is disposed upstream of the first offset pinch rolls, said No. 0 pinch roll upper roll is 0 or
And has a roll curve of the concave crown, the lower roll have a roll curve of the concave crown, and the No. 1
The lower roll of the pinch roll has a convex crown roll curve.
A perforated rolling material winding apparatus in the hot strip mill.

The present invention will be described below with reference to the drawings. As shown in the drawing, a strip hot-rolled to a desired thickness and width in a finishing mill 1 is cooled to a target winding temperature on a hot run table 3 and then provided in a subsequent winding. It is wound in a coil shape by the machine 4. Here, before the winding machine, side guides 5 and 6 serving as a center of the strip are provided in order to secure a coil having a good winding shape.

In the present invention, no. No. 0 pinch roll 2 is provided, and No. One pinch roll 7 is provided to guide the leading edge of the strip and to maintain the back tension after the tail end of the strip has passed through the finishing mill.

The pinch roll 2 has an offset of zero, is given a roll size of upper roll diameter> lower roll diameter, and the upper and lower rolls are driven separately. Further, the upper roll and the lower roll have a flat roll curve or a concave crown in the central area.

The pinch roll 7 has an offset amount so that the strip is wound around the outer circumference of the upper and lower rolls and is pinched, and is given a roll size of upper roll diameter> lower roll diameter. The roll curve of the upper and lower rolls is a convex crown.

[0010]

EXAMPLE A strip was wound on a coil according to the roll arrangement shown in FIG. No. 0 and No. Table 1 shows the roll diameter of one pinch roll. No. 0-No. The interval 1 between the pinch rolls was 7.3 m.

[0011]

[Table 1]

No. The roll crown of the 0 pinch roll was set to zero. No. The upper roll of the 0-pinch roll is raised and lowered by an air cylinder, the pressing force of the upper roll is controlled within a range of 0 to 60 tons, and the gap between the upper and lower rolls is set by an electric motor. No. The motor power of the 0 and 1 pinch rolls was 750 kW, and the power of the mandrel motor was 1500 kW. The tension generating capabilities of the mandrel and the pinch roll were perfectly balanced, and high tension winding could be realized.

When the strip performs tension monitor gap control, fine tension control, and tension movement control during rolling of the finishing stand, and when the strip tail passes through the finishing stand, N
o. No. 0 pinch roll and No. Tension distribution control between one pinch roll was performed. No. By using 0 pinch roll, tight coil winding with high tension can be realized.
The winding speed was made constant, and speed fluctuation disturbance applied to the winding temperature control could be eliminated.

[0014]

According to the present invention, Provide 0 pinch roll,
And because the roll curve is a flat to concave crown,
The coil winding shape can be improved and the winding speed can be made constant.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an apparatus arrangement of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Finish rolling mill 2 # 0 pinch roll 3 Hot run table 4 Winding machine 5,6 Side guide 7 # 1 pinch roll

Claims (1)

(57) [Claims] Claims: 1. No. 1 before a winder of a hot strip mill line. No. 1 offset pinch roll is placed, and no. 0
Pinch roll No. In the strip winding device which is disposed upstream of the first offset pinch rolls, said No. 0pi
Roll car with zero roll or concave crown
And having a blanking, lower roll have a roll curve of the concave crown, and the No. Roll under one pinch roll
There rolled material winding apparatus in the hot strip mill, characterized in that the perforated roll curve convex crown.