JPH0569040A - Device for coiling rolled stock in hot strip mill - Google Patents

Abstract

PURPOSE:To improve a coiling figure and to fix a take-up speed by providing a No.0 pinch roll and making a roll curve to a flat-recessed crown. CONSTITUTION:The No.0 pinch roll 2 is arranged between side guides 5, 6 and a pinch roll 7 is arranged on the outlet side of a side guide 6 to induce the tip of the strip and to maintain the back tension after the tail end of the strip passes through a finishing mill. The pinch roll 2 is set zero in offset and has the diameter of the upper roll larger than that of lower roll. The upper and lower rolls can be driven separately and the roll curve is made flat or recess-crown in the central area. The pinch roll 7 has an offset amount and the roll curve is made projecting.

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 for a hot strip mill.

[0002]

2. Description of the Related Art A strip winding device for a hot strip mill is disclosed in, for example, JP-A-58-77717.
In the gazette, immediately before the pinch roll which plays a role of guiding the strip front end before the winder and the back end of the strip after holding the finishing rolling mill and the side guide which plays a role of centering the strip. ,
It is disclosed to arrange a pinch roll that serves to absorb the slack of the strip on the hot run table before the strip tip winds around the winder and to keep the back tension after the strip tail end leaves the finishing mill. There is.

Further, in Japanese Patent Laid-Open No. 58-205614, in a winding device for winding a rolled material between upper and lower pinch rolls and winding it into a coil on a mandrel, 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 unevenness of the edges in coil winding is improved by forming the above in the middle and low crowns having a gentler curve than in the middle and high crowns.

[0004]

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

[0005]

According to the present invention, in a hot strip mill, the hot strip mill has a No. No. 1 having an offset pinch roll and having a flattened or concave crown low-hell curve. 0 pinch roll is the No. This is a rolled material winding device arranged on the upstream side of one pinch roll.

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

According to the present invention, the No. 3 is provided between the side guides 5 and 6. No. 0 pinch roll 2 is provided, and No. One pinch roll 7 is provided to guide the strip leading end and to hold the back tension after the strip tail end passes 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 have a concave crown in the central region.

The pinch roll 7 has an offset amount so that the strip is wound around the outer circumferences of the upper and lower rolls and is pinched by contact, 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 into a coil according to the roll arrangement shown in FIG. No. 0 and No. The roll diameter of 1-pinch roll is as shown in Table 1. No. 0-No. The interval 1 for one pinch roll was 7.3 m.

[0011]

[Table 1]

No. The roll crown of 0 pinch roll was set to zero. No. The upper roll of the 0 pinch roll is moved up and down by an air cylinder, the upper roll pressing force is controlled in the 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 0 and 1 pinch rolls was 750 kW, and the mandrel motor power was 1500 kW, and the tension generating abilities of the mandrel and pinch rolls were perfectly balanced, and high tension winding could be realized.

When the strip tail roll gap control, fine tension control, and tension movement control are performed during rolling of the finish stand, and the strip tail exits the finish stand, N
o. 0 pinch roll and No. The tension distribution control between 1 pinch rolls was performed. No. By using 0 pinch rolls, high tension and tight coil winding can be achieved.
The take-up speed was kept constant, and the speed fluctuation disturbance given to the take-up temperature control could be eliminated.

[0014]

According to the present invention, no. With 0 pinch rolls,
And since the roll curve is flat to concave crown,
The coil winding appearance can be improved and the winding speed can be made constant.

[Brief description of drawings]

FIG. 1 is an illustration of a device arrangement of the present invention.

[Explanation of symbols]

 1 Finishing Rolling Machine 2 # 0 Pinch Roll 3 Hot Run Table 4 Winding Machine 5, 6 Side Guide 7 # 1 Pinch Roll

Claims (2)

[Claims] 1. A hot strip mill having a No. No. 1 with no roll crown is provided with an offset pinch roll. 0 pinch roll is the No. 1. A rolled material winding device in a hot strip mill, which is arranged on the upstream side of the offset pinch roll No. 1. 2. An N having a concave crown roll curve.
o. The rolling material winding device for a hot strip mill according to claim 1, wherein 0 pinch rolls are provided.