JPH07120249A - Method and apparatus for measuring shape of coil - Google Patents

Abstract

PURPOSE:To develop a means wherein, when an aluminum foil is manufactured, its lack of uniformity in the width direction is measured continuously, a drop in its quality due to the production of an out-of-specifications product as the aluminum foil or the generation of a wrinke is detected at an early stage and an abnormality is fed back. CONSTITUTION:A support utensil 8 in which a plurality of non-contact-type sensors 6 are installed in the width direction, is installed so as to be close to a coil take-up face 4, and the support utensil 8 is measured continuously by a coil-shape measuring apparatus equipped with a position control mechanism in which a distance up to the coil take-up face is automatically maintained to be definite according to a change in the coil take-up face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film-like material, for example, a foil of metal or the like, a laminate of metal and a plastic film or paper, etc., and particularly by rolling aluminum or aluminum alloy (both are simply referred to as aluminum hereinafter). The present invention relates to a method for continuously measuring the shape of a coil obtained by winding a rolled foil in the production of foil, and a measuring device therefor.

[0002]

2. Description of the Related Art Metal foils, especially aluminum foils, are easy to manufacture and handle, are lightweight, are beautiful, and reflect light, heat, etc.
Since it has many excellent properties such as light blocking property, oxygen barrier property, conductivity, and heat transfer property, it is used in a wide range of industrial fields such as packaging materials, electric products, decorative materials, and building materials.

Although such aluminum foil is manufactured by rolling, the uniformity of the thickness and shape of the foil is an important item of quality, and the demand for uniformity has become more and more stringent in recent years. , Its control has become one of the important control items of aluminum foil production.

The aluminum foil is obtained by rolling an aluminum material into a foil, which is wound into a coil.

In the rolling mill in this case, a wide rolling mill has a roll width of 2000 mm, and since it is supported and rotated only at both ends of the rolling mill, the thickness in the width direction easily inevitably varies, but this variation is conventionally measured. The surface of the coil winding surface that has been wound up offline is measured by the contact method.

In this case, there are problems such as scratches on the foil surface, but the biggest problem is that the shape of the coil is measured after winding, so feedback to the aluminum foil during rolling is a problem. It is a big delay and a large amount of off-spec products.

The unevenness of the shape and thickness of the foil means that even if it is within the allowable range of specifications, the shape of the coil becomes uneven like a drum with a bulging central part or warping, and the separator in the next step. Or, in the slitter, it causes a decrease in productivity due to a decrease in speed, and a deterioration in quality such as wrinkles.Therefore, in order to control the rolling process, the coil shape during the rolling process is continuously measured, and its abnormality is found. There is a growing need for prompt feedback of that data.

[0008]

When rolling an aluminum material and rolling an aluminum foil, the non-uniformity in the width direction of the aluminum foil is continuously measured to generate an off-spec product of the aluminum foil and to improve productivity. In order to detect quality deterioration due to deterioration, wrinkles, etc. at the earliest possible stage,
In particular, it is an object of the present invention to develop a method and a device therefor for making the shape of the coil uniform in order to prevent the foil from being tarwed during unwinding.

[0009]

DISCLOSURE OF THE INVENTION The present invention, when continuously producing a film-like material and winding it into a coil,
A coil shape measuring method for continuously measuring the surface shape of a coil winding surface to be wound by a non-contact type distance sensor provided in parallel at a plurality of positions in the width direction of the film-like object in proximity to the coil winding surface, and In the film-like material winding device, a support tool provided with a plurality of non-contact type distance sensors is provided in the widthwise direction of the film-shaped material in the vicinity of the coil winding surface,
Achievement of the above object by developing a coil shape measuring device having a position control mechanism so that the position of the support tool can automatically maintain a constant distance from the coil winding surface according to changes in the coil winding surface. did.

The film-like material of the present invention is not particularly limited as long as it can be handled by winding it into a coil by a winding machine after production, such as paper, film, foil, etc., but during production (during winding). Continuously measures the coiled shape of the product and immediately feeds back that information to the manufacturing process of the coiled material to directly prevent not only off-spec prevention but also productivity reduction and wrinkle prevention. It is effective in preventing troubles. This is a very effective measurement method for the production of aluminum foil.

Only the aluminum foil will be described below, but it goes without saying that the coil shape can be measured similarly even if the material is different.

FIG. 1 shows an example in which the present invention is applied to aluminum foil rolling. The aluminum material 1 is rolled by a rolling mill 2 to form an aluminum foil, which is wound around a winding core 5 in a coil shape to form a coil 4 . The coil 4 has the thickness of the winding core 5 at the start of rolling, but the coil becomes thicker as the rolling work progresses, and the diameter of the coil winding surface gradually increases. The surface shape of the coil winding surface is continuously measured by a plurality of non-contact type distance sensors 6 provided on the sensor support in the vicinity of this surface.

In this case, the number of the non-contact type sensors 6 varies depending on the width of the rolled aluminum foil, the required uniformity of the thickness and the like, but it is usually between about 6 and 20. If the number is less than 6, the shape of the entire coil tends to be insufficiently grasped depending on the width of the aluminum foil. Again 20
If the number exceeds the number, the accuracy of the measured value will be small if it is improved, and there is no economic merit, so there is no upper limit, but this is sufficient.

Since the maximum unevenness of the coil 4 is about 0.1 mm, the non-contact type distance sensor 6 requires a high detection accuracy, and a detection accuracy of about 0.01 mm or more is desired. As described above, the non-contact type distance sensor 6 having high detection accuracy needs to be set to a distance of 10 mm or less from the normal measurement point in order to maintain the sensor accuracy.

On the other hand, the roll diameter of the coil 4 changes depending on the thickness of the aluminum foil, the winding amount, etc., but in industrial production, it is usually wound up to a thickness of about 400 mm around the winding core 5. There is.

In the present invention, a plurality of non-contact type distance sensors 6 are provided in order to maintain the most suitable distance for the measurement of the non-contact type distance sensor 6 at any time in response to such a large change in the coil winding surface. Is installed on a sensor support 8 such as a bar, and the signal of the sensor is used so as to keep the distance between the winding surface and the sensor within a suitable range at all times, or by another means, the hydraulic cylinder 7 Alternatively, the position of the measurement sensor is controlled using a means such as a pulse motor.

The signal from the sensor is analyzed by the controller 9 and fed back to the hydraulic cylinder 7 to control the position of the support of the distance sensor and send a signal to the ironing roll 3 or the controller 10 of the rolling mill 1 to perform rolling. Machine control is performed.

In the above description, the control of the aluminum foil rolling mill has been described. However, the present invention is merely a method for measuring the shape of a coil and a measuring device, which is used for other film-like materials such as T-. In the case of die method, plastic film, etc., the signal may be returned to the adjustment of the die slit, and the usage method should be appropriately used for each field.

[0019]

[Function] In the manufacturing method of aluminum foil or the like which is continuously rolled at high speed, the difference in the uniformity of the thickness in the width direction is small, and it is measured that a sample is not taken by cutting-restarting or the like. Because it is difficult to measure, the wound aluminum foil coil is measured offline by contact type, and the rolling mill is adjusted according to the result, and the adjusted result waits for the aluminum foil coil to wind up before measurement. I had to do it, so it took time to feed back the data.

On the other hand, in the method of the present invention, the variation in the width direction of the aluminum foil is continuously measured by using the non-contact type distance sensor, the result is inspected by the controller, and an appropriate instruction is given. It is possible to operate.

Particularly, in the non-contact type distance sensor, the allowable measurement distance is extremely narrow with respect to the moving distance of the measuring point (coil winding surface), and it is difficult to maintain an appropriate interval.
A non-contact type distance sensor is installed on the sensor support, and the position of the measuring part can be continuously controlled by means of a hydraulic cylinder, a pulse motor, etc. by using the signal from the sensor.

[0022]

According to the present invention, a plurality of non-contact type distance sensors are installed on a support and a measuring machine is used which maintains the support and an appropriate distance from the coil winding surface at any time by sensor signals or the like. The purpose is to continuously measure the shape of the coil winding surface, and the signal is put into a controller, and after calculation, it can be used for control such as rolling of aluminum foil.

As a result, the measurement can be continuously performed, and the operation does not have to be stopped. The operation condition is changed by the fed back data, or the shape of the coil winding surface accompanying the change of the operation condition is changed. It has become possible to measure changes continuously.

Therefore, in the production of aluminum foil, the shape of the winding coil can be stabilized at an early stage, there is no trouble in separators and slitters, there is no deterioration of quality such as wrinkles, and the productivity of aluminum is high. Foil production is possible.

[Brief description of drawings]

FIG. 1 shows an example in which the coil shape measuring device of the present invention is incorporated in a winding device for aluminum foil rolling.

FIG. 2 is a plan view of a portion of the coil and the non-contact distance sensor shown in FIG.

[Explanation of symbols]

1 Aluminum Material 2 Rolling Mill 3 Ironing Roll 4 Coil 5 Core 6 Non-contact Distance Sensor 7 Hydraulic Cylinder 8 Sensor Support 9 Controller 10 Rolling Mill Controller

Claims (2)

[Claims] 1. A non-contact type distance provided in parallel at a plurality of positions in the width direction of the film-like material in the vicinity of the coil winding surface when the film-like material is continuously manufactured and wound into a coil. A coil shape measuring method characterized by continuously measuring the surface shape of a coil winding surface to be wound by a sensor. 2. A film-shaped product winding device, wherein a support is provided in the widthwise direction of the film-shaped product in the vicinity of a coil winding surface, and a non-contact type distance sensor is provided on the film-shaped product. A coil shape measuring device having a position control mechanism capable of automatically maintaining a constant distance from the coil winding surface according to changes in the coil winding surface.