JPH0213806A - Method and apparatus for measuring shape of rolled foil or the like wound on winding reel - Google Patents

Abstract

PURPOSE:To measure a shape of a rolled foil or the like accurately by measur ing an outer diameter distribution of a rolled foil wound on a winding coil. CONSTITUTION:An outer diameter of a rolled foil 2 wound on a winding reel 1 is measured with a displacement meter 4 at points across the width of the rolled foil. From a radius R at a reference position and radius R+DELTARi at positions, an arithmetic device B determines an elongation difference ratio epsilonat the positions = DELTARi/Ri. Thus, a shape of a lug elongation, medium elongation, 2nd-4th elongations, one-side elongation or the like is measured accurately depending on a value of the elongation difference ratio epsilon at the respective positions.

Description

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

In this specification, the term "rolled foil, etc." is used to include rolled thin plates.

BACKGROUND OF THE INVENTION Conventionally, the shape (flatness) of rolled foil, etc. has been measured by measuring the shape immediately after rolling with 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, etc. is subjected to the next process, such as a slitter or separator, based on the above measurement results,
In some cases, it was not possible to obtain the desired product. When we considered the cause of this, we found that the shape of the rolled foil etc. changes when it is wound on the take-up reel, and the shape differs from the shape before winding.In other words, the measurement results using the shape measuring instrument mentioned above are It has been found that this does not accurately represent the shape after winding onto the take-up reel.

In particular, in the case of aluminum foil, the shape changes significantly when it is wound around a take-up reel, and the shape after winding cannot be accurately evaluated based on the measured values before winding.

Therefore, in order to perform appropriate quality control in the next process or to perform rolling control that predicts shape changes in the subsequent rolling process, the shape of the rolled foil, etc. in the state wound on the take-up reel, etc. It is necessary to understand accurately.

This invention has been made in view of the above-mentioned problems, and aims to provide a method and apparatus for accurately measuring the shape of rolled foil, etc. wound around a take-up reel. It is.

The inventors conducted various experiments and research for the above purpose, and found that there is a correlation between the outer diameter distribution of the rolled foil, etc. wound around the winding coil, and the shape of the rolled foil, etc. after winding. It was discovered that there is a relationship between the two, and this led to the completion of this invention.

Means to solve problems That is, it is wound on the take-up reel according to the present invention.

The method for measuring the shape of rolled foil, etc., is to measure the outer diameter at each position at multiple locations in the width direction of rolled foil, etc. wound around a take-up reel, and calculate the radius R at the reference position and the radius R + ΔRi at each position. Therefore, the elongation difference rate ε at each position above is
This method is characterized in that the shape n1 is determined by calculating ΔRi/R1.

The idea of this measurement method is that the radius and circumference at the reference positions at multiple points in the width direction of the rolled foil etc. wound on the take-up reel are R and L, respectively, and the radius and circumference at each position in the width direction are respectively R+ΔR15L
This is based on the fact that when +ΔL, ΔRi/R and ΔLL/L match. Therefore, △R
ΔLi/L by finding i/Ri.

That is, the elongation difference ε at each position in the width direction is determined, and from this elongation difference ε, the shape of the rolled foil etc. in the state wound on the take-up reel can be determined.

Therefore, in the present invention, it is first necessary to measure the outer diameter at a plurality of locations in the width direction of the rolled foil or the like wound around the take-up reel. For this measurement, set any specific position in the width direction as the reference position,
The radius R1 at the reference position and the radius R+ΔRi at each position in the width direction are measured.

Then, by calculating ΔRi/R from each obtained value, the elongation difference ratio ε can be obtained. Depending on the magnitude of this elongation difference rate ε at each position, it can be determined whether the material is elongated at the edge, middle elongated, 2nd to 4th elongated, or elongated on one side.

Note that the method according to the present invention can be employed not only when measuring with the take-up reel stopped, but also when measuring while winding or unwinding. In the former case, the shape after winding can be measured in a short time, which is effective for product quality control. In the latter case, the shape and quality of the product can be greatly improved by controlling rolling conditions such as roll bending and crosswise distribution of coolant flow rate during rolling based on the measurement results.

The above measurement is performed using an outer diameter measuring means that measures the outer diameter at each position at multiple points in the width direction of the rolled foil, etc. wound around a take-up reel, and a radius R at a reference position obtained by the measuring means. This can be carried out using a measuring device equipped with a calculation means for calculating the elongation difference rate ε=ΔRi/Ri at each position from the radius R+ΔRL at each position.

As the outer diameter measuring means, a displacement meter or a non-contact distance sensor that is movable in the width direction along the axial direction of the take-up reel, or a plurality of non-contact distance sensors arranged in the width direction is preferably used. It will be done.

The 1111 determination method and its n1 determination device according to the invention are suitably employed when measuring the shape (flatness) of rolled aluminum foil wound around a winding coil. In particular, in the case of aluminum foil, the shape changes significantly when it is wound on the take-up reel, and it is difficult to unwind by simply measuring the shape immediately after rolling with a shape measuring roll installed on the exit side of the rolling mill. This is because the shape of the rolled foil wound around the coil cannot be accurately evaluated.

Example The present invention will be described in detail below.

FIG. 1 shows an apparatus for measuring the shape (flatness) of a rolled aluminum alloy foil (2) wound around a take-up reel (1) in a stationary state.

The take-up reel (1) is supported in a horizontal state by a support device (3). (4) is a displacement meter, which is movable from one end in the width direction to the other end while the stylus (4a) provided at the lower end is in contact with the rolled foil (2). being done. This displacement meter (4) is supported by a guide (5) connected to its upper part being slidably inserted into a guide rod (6) arranged parallel to the reel (1). ing.

Then, the female thread for screwing (
7) is screwed into a rotating screw rod (8) disposed parallel to the guide rod (6), and the screw rod (8)
The displacement meter (4) is moved by being rotated by a motor (M) via a gear (9). Then, the output signal of the displacement meter (4) is amplified by the amplifier (A), and the amplified signal is led to the arithmetic unit (B), which calculates the radius value R at the reference position and the radius value at each position in the width direction. From R+ΔRi, the elongation difference rate ε=ΔRi/Ri at each of the above positions is calculated, and the result is printed out by the printer (C).

Using the above measuring device, the outer diameter (radius) and shape (elongation rate) of the rolled aluminum foil (2) wound around the take-up reel (1) are measured in a stationary state. The rolled foil (2) was unwound from the take-up reel (1) and its shape (elongation ratio ε) was measured by a conventional method.

The measurement results are shown in FIGS. 3 to 5. In addition, the fourth
In the figure and FIG. 5, 11-unit is ΔL/L-
This corresponds to 10-5.

From the above results, it was confirmed that according to the present invention, measurements can be made with almost no errors compared to the case where measurements are made after unwinding the film while it remains wound on the take-up reel.

FIG. 2 shows a device for measuring the shape (flatness) of rolled aluminum alloy foil (2) while being wound around a take-up reel (1), and shows a device for measuring the shape (flatness) of rolled aluminum foil (2) while winding it around a take-up reel (1). Instead, a plurality of non-contact distance sensors (40) are arranged in the width direction of the rolled foil (2). Since the amplifier, arithmetic unit, printer, etc. are the same, the same reference numerals are given and the explanation thereof will be omitted.

Effects of the Invention As described above, the method for measuring the shape of rolled foil, etc., wound around a take-up coil according to the present invention is as follows. Rather than measuring the shape of the rolled foil wound on the take-up reel, the outer diameter at each position is measured at multiple points in the width direction, and the radius R at the reference position and the radius R + ΔRi at each position are calculated. , the elongation difference rate ε=Δ at each position above
By calculating Ri/Ri, what is wound around the take-up reel is measured, so the shape after change due to winding can be accurately measured. Therefore, when measuring with the take-up reel stationary, it is not only possible to measure the shape after winding in a short time, but also to properly control quality in the next process. In the process, it is possible to perform rolling control that predicts changes in shape after winding. On the other hand, when measuring while winding or unwinding, the shape and quality of the product can be greatly improved by controlling rolling conditions such as roll bending and crosswise distribution of coolant flow rate during rolling based on the measurement results. It can be improved.

Further, as claimed in claim 2, there is provided an outer diameter measuring means for measuring the outer diameter at each position at a plurality of locations in the width direction of a rolled foil or the like wound around a take-up reel; The radius R at the reference position and the radius R at each position
From 10ΔRi, the difference in elongation rate at each of the above positions is ε=ΔRi /
By using a shape measuring device equipped with calculation means for calculating R1, the shape after changes due to winding can be accurately measured while the winding is still wound on the take-up reel. Therefore, as mentioned above, it is possible to properly control the quality in the next process, and in the subsequent rolling process, it is possible to perform rolling control that predicts the change in shape after wrapping, and furthermore, it is possible to perform feedback control during rolling. By doing so, the shape and quality of the product can be greatly improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are explanatory views showing the measuring device according to the invention, and FIG.
The figure is a graph showing the outer diameter in the width direction of rolled foil measured by the device according to the present invention, and Figures 4 and 5 are comparisons between the measurement results based on the present invention and the results measured after unwinding. It is a graph. (1)...Take-up reel, (2)...Rolled foil, etc., (4
) (40)...Outer diameter measuring means (displacement meter, non-contact distance sensor), (A)...Calculating means. Above Figure 1 Figure 2

Claims (2)

[Claims] (1) Measure the outer diameter at multiple locations in the width direction of the rolled foil, etc. wound on the take-up reel, and calculate the elongation at each location from the radius R at the reference position and the radius R + ΔRi at each position. A method for measuring the shape of rolled foil, etc. wound around a take-up reel, characterized in that the shape is measured by calculating the difference ratio ε=ΔRi/Ri. (2) An outer diameter measuring means for measuring the outer diameter at each position at multiple points in the width direction of the rolled foil etc. wound on the take-up reel, and the radius R at the reference position obtained by the measuring means and each An apparatus for measuring the shape of a rolled foil or the like wound around a take-up reel, comprising a calculation means for calculating the elongation difference rate ε=ΔRi/Ri at each position from the radius R+ΔRi at the position. .