JP2710105B2 - Method and apparatus for measuring shape of rolled foil wound on take-up reel - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring the shape of a rolled foil or a rolled thin plate wound on a take-up reel.

In this specification, the term "rolled foil" is used in a sense including a rolled thin plate.

2. Description of the Related Art Conventionally, measurement of the shape (flatness) of a rolled foil has been performed by measuring the shape immediately after rolling by a shape measuring device such as a shape sensor roll installed on the exit side of a rolling mill.

Problems to be Solved by the Invention However, when the rolled foil is subjected to the next step, such as a slitter or a separator, based on the above measurement results,
In some cases, the expected product could not be obtained. Considering such a cause, the shape changes when the rolled foil is wound on the take-up reel, and the shape is different from the shape before winding. It turned out that the shape after winding on the reel was not accurately represented. In particular, in the case of aluminum foil, a change in shape due to winding on a take-up reel is large, and the measured value before winding cannot accurately evaluate the shape after winding. Therefore, in order to perform appropriate quality control in the next process, or to perform rolling control in which a shape change is predicted in the subsequent rolling process, the shape of the rolled foil wound on the take-up reel is changed. It is necessary to know exactly.

The present invention has been made in view of the above problems, and has as its object to provide a method and an apparatus for accurately measuring the shape of a rolled foil wound on a take-up reel. is there.

Thus, the inventors conducted various experiments and studies for the above purpose, and found that there was a correlation between the outer diameter distribution of the rolled foil wound on the winding coil and the shape of the rolled foil after winding. They have found something and completed the present invention.

Means for Solving the Problems That is, the method for measuring the shape of the rolled foil wound on the take-up reel according to the present invention includes a method of measuring the shape of the rolled foil wound on the take-up reel at a plurality of positions in the width direction of the rolled foil. The outer diameter is measured while winding or rewinding with a non-contact sensor, and the radius R at the reference position and the radius R +
The shape of the rolled foil is measured by calculating the elongation difference ratio ε = △ Ri / R at each position from ΔRi.

The idea of this measurement method is that the radius and the circumference at the reference position are R and L at a plurality of positions in the width direction of the rolled foil wound on the take-up reel, and the radius and the circumference at each position in the width direction are R and L, respectively. R + △ Ri, L +
This is based on the fact that ΔRi / R and ΔLi / L match when ΔL is used. Thus, by obtaining △ Ri / R, △ Li / L, that is, the elongation difference rate ε at each position in the width direction,
Is obtained, and the shape of the rolled foil in the state of being wound on the take-up reel can be determined from the difference in elongation ε.

Therefore, in the present invention, it is first necessary to measure the outer diameter at each of a plurality of locations in the width direction of the rolled foil wound on the take-up reel. In this measurement, an arbitrary specific position in the width direction is set as a reference position, and the radius R at the reference position and the radius R + △ Ri at each position in the width direction are measured. From the obtained values, ΔRi / R is calculated to obtain the elongation difference rate ε. From the magnitude of each of the elongation difference ratios ε at each position, it can be seen that the ear is elongate, middle elongate, the second to fourth elongation or one-sided elongation.

In addition, since the measurement is performed while rolling or unwinding the rolled foil, the rolling conditions such as roll bending and the distribution of coolant flow in the width direction are feedback-controlled during rolling based on the measurement results, so that the shape and quality of the product can be greatly increased. Can be improved.

The measurement is performed by measuring the outer diameter at each of a plurality of locations in the width direction of the rolled foil wound on the take-up reel while taking up or rewinding the outer diameter at each position by using a non-contact sensor; and Based on the obtained radius R at the reference position and the radius R + △ Ri at each position, the measurement can be performed by a measuring device including calculation means for calculating the elongation difference rate ε = △ Ri / R at each position.

The measuring method and the measuring device according to the above invention are suitably adopted when measuring the shape (flatness) of the rolled aluminum foil wound on the winding coil.
In particular, in the case of aluminum foil, the shape change due to being wound on the take-up reel is large. This is because the shape of the rolled foil wound on the coil cannot be accurately evaluated.

Examples Hereinafter, examples of the present invention will be described.

FIG. 1 shows an apparatus for measuring the shape (flatness) of a rolled aluminum alloy foil (2) while winding it on a take-up reel (1). A plurality of non-contact distance sensors (40) are provided.

Then, the output signals of the plurality of non-contact distance sensors (40) are amplified by the amplifier (A), and the amplified signals are guided to the arithmetic unit (B). From the radius value R + △ Ri at each position,
An elongation difference ratio ε = △ Ri / R at each of the above positions is calculated, and the result is printed by the printer (C).

The coil outer diameter (radius) and shape (elongation rate) of the rolled aluminum alloy foil (2) wound on the take-up reel (1) are measured while being wound using the above-described measuring device. At the same time, the measurement portion of the rolled foil (2) is rewound from the take-up reel (1), and the shape (elongation rate ε) is obtained by a conventional method.
Was measured. The measurement results are shown in FIGS. Note that in FIGS. 3 and 4, 1I-unit is
This is equivalent to L / L = 10 ^-5 .

From the above results, it was confirmed that according to the present invention, the measurement can be performed with almost no error compared to the case where the measurement is performed by rewinding, while being wound on the take-up reel.

Effect of the Invention The method for measuring the shape of the rolled foil wound on the winding coil according to the present invention is, as described above, as described above, immediately after rolling by a shape measuring roll or the like installed on the exit side of the rolling mill. Instead of measuring the shape, the outer diameter at each of the rolled foils wound on the take-up reel is measured at a plurality of positions in the width direction while being wound or unwound by a non-contact sensor, and the radius R at the reference position is measured. By calculating the elongation difference rate ε = と Ri / R at each position from the radius R + △ Ri at each position, the one wound on the take-up reel is measured. The shape after the change can be accurately measured. For this reason, the shape and quality of a product can be greatly improved by performing feedback control during rolling, such as roll bending and the distribution of coolant flow in the width direction, based on the measurement results.

In addition, as described in claim 2, at a plurality of positions in the width direction of the rolled foil wound on the take-up reel, the outer diameter at each position is measured while taking up or rewinding by a non-contact sensor. Means, a radius R at a reference position obtained by the measuring means, and a radius R + △ at each position.
By using the shape measuring device provided with Ri and the calculating means for calculating the elongation difference ratio ε = △ Ri / R at each position, the shape measuring method can be reliably performed.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is an explanatory view showing a measuring device according to the present invention, and FIG. 2 shows an outer diameter in a width direction of a rolled foil measured by the device according to the present invention. The graphs, FIG. 3 and FIG. 4 are graphs showing a comparison between the measurement result based on the present invention and the result measured by rewinding. (1) Take-up reel, (2) Rolled foil, (40)
Outer diameter measuring means (non-contact distance sensor), (A) ... calculating means.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuyuki Sekimori 6,224, Kaiyamacho, Sakai-shi, Osaka (Showa Aluminum Co., Ltd.) Ed. “Theory and Practice of Sheet Rolling” (Showa 59-9-1) The Iron and Steel Institute of Japan 96

Claims (2)

(57) [Claims] An outer diameter at each of a plurality of positions in a width direction of a rolled foil wound on a take-up reel is measured by a non-contact sensor while taking up or rewinding, and a radius R at a reference position and each position are measured. The method for measuring the shape of a rolled foil wound on a take-up reel is characterized in that the shape is measured by calculating the elongation difference rate ε = △ Ri / R at each of the positions from the radius R + △ Ri. 2. An outer diameter measuring means for measuring an outer diameter at each of a plurality of positions in a width direction of a rolled foil wound on a take-up reel while winding or rewinding the same by a non-contact sensor, and the measuring means. A calculating means for calculating the elongation difference rate ε = △ Ri / R at each position from the obtained radius R at the reference position and the radius R + △ Ri at each position. A device for measuring the shape of a rolled foil wound on a take-up reel.