JPH0714523B2 - Stripping Jet - Google Patents

Description

TECHNICAL FIELD The present invention relates to a strip edger provided between stands of a finish rolling mill.

[Prior Art] Conventionally, the width reduction of a rolled material is generally performed by an edger provided near the rough rolling machine on the upstream side of the rolling line. However, if the width reduction is performed on the upstream side of the rolling line, the thickness reduction performed on the downstream side of the rolling line causes edge drops at the material edges and the strip cross-sectional shape deteriorates. There has been a problem that the error of the obtained plate width increases and the plate width accuracy decreases. Therefore, in recent years, it has been studied to perform width reduction between finishing stands on the downstream side of the rolling line to improve the cross-sectional shape and width accuracy of the strip.

[Problems to be Solved by the Invention] However, when the edger is provided between the finishing stands to perform the width reduction, the strip becomes thinner due to the thickness reduction on the upstream side. Buckling may occur.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to prevent the strip from buckling due to width reduction and to enable stable width reduction.

[Means for Solving Problems] The present invention is intended to solve the above technical problems,
Between the roll gaps of the edger installed between the rolling mill stands, a width end upper pressing roll that presses the upper surface of the width end of the strip is provided, and the width upper end pressing roll and the strip is pushed upward on the upstream side of the strip. Between the looper and the looper provided in the
The present invention relates to a strip edger, wherein the strip edger is arranged so as to be positioned within a space between the outer peripheral lower surface of the width end upper pressing roll and the outer peripheral upper surface of the looper roll.

[Operation] Therefore, in the present invention, the interaction between the width-end presser roll, the full-width presser roll, and the looper increases the apparent rigidity of the strip and reduces buckling.

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

FIGS. 1 and 2 show an example of the present invention, in which the edger rolls 4 and 5 are pressed to both width ends of the strip 3 between the rolling mill stands 1 and 2 for finish rolling to reduce the width of the strip 3. In the edger that performs
In the roll gap, the width end upper pressing rolls 6 and 7 for pressing the width end upper surface of the strip 3 are provided.

Further, on the upstream side of the strip 3 of the edger, there is provided a full width upper pressing roll 8 adapted to press the entire width of the upper surface of the strip 3, and further, on the upstream side of the full width upper pressing roll 8, the lower surface of the strip 3 is interposed by a looper roll 9. And a looper 10 for pushing it upward.

Due to the rise of the looper roll 9 described above, the strip 3
Is controlled so that the outer peripheral lower surface of the full width upper pressing roll 8 is positioned within the distance A between the outer peripheral lower surfaces of the width end upper pressing rolls 6 and 7 and the outer peripheral upper surface of the looper roll 9. ing.

As described above, the lower surface of the full width upper presser roll 8 is separated from the lower surface of the width end upper presser rolls 6 and 7 and the upper surface of the looper roll 9 by the distance A.
If the looper angle θ is selected so that it is positioned inside, the entire width of the slip is bent by the upper width presser roll 8 to increase the apparent rigidity, and the vertical position of the strip in the entire width is regulated. roll
Since the width reduction is performed by the edger rolls 4 and 5 in a state where the rigidity of the width end is increased by slightly bending only the width end of the strip 3 by 6,7, the apparent rigidity is increased. By the action of the tension and the tension, the width reduction of the strip 3 can be stably performed without causing buckling.

It should be noted that the present invention is not limited to the above embodiments, and various changes can be made without departing from the scope of the present invention.

[Advantages of the Invention] As described above, according to the strip edger of the present invention, the apparent rigidity of the strip is significantly increased by the interaction between the width end presser roll, the full width presser roll, and the looper. It is possible to prevent buckling from occurring, and thus it is possible to obtain an excellent effect that the width reduction of the thin object can be stably performed.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, and FIG.
It is a top view of a figure. 1, 2 is a rolling mill stand, 3 is a strip, 4 and 5 are edger rolls, 6 and 7 are width-end presser rolls, 8 is a full-width presser roll, 9 is a looper roll, and 10 is a looper.

Front page continued (72) Inventor Kunio Kawamura 5-3 Tokai-cho, Tokai-shi, Aichi Pref.Nippon Steel Works, Nagoya Works (72) Inventor Kiyoshi Oya 5-3 Tokai-cho, Tokai-shi Aichi Steel Works Co., Ltd. Nagoya Steel Works (56) References Japanese Patent Laid-Open No. 59-70403 (JP, A) Shoukai 60-28901 (JP, U)

Claims (1)

[Claims] 1. A width end upper pressing roll for pressing an upper surface of a width end portion of a strip is provided between roll gaps of an edger installed between rolling mill stands, and the width end upper pressing roll and the strip are arranged upstream of the strip. Between the looper provided so as to be pushed upward, a full width upper press roll for pressing the entire width of the upper surface of the strip, and the outer peripheral lower surface of the full width upper press roll is the outer peripheral lower surface of the width end upper press roll and the outer peripheral upper surface of the looper roll. A strip edger, which is arranged so as to be located within a distance from the strip edger.