JP2796926B2 - Method and apparatus for measuring coil shape - Google Patents

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 a metal or the like, a lamination of a metal with a plastic film or paper, etc., particularly by rolling of aluminum or an aluminum alloy (both are simply referred to as aluminum hereinafter). In the production of foil, the present invention relates to a method for continuously measuring the shape of a coil on which a rolled foil is wound, and a measuring apparatus therefor.

[0002]

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

[0003] Such aluminum foil is manufactured by rolling, but the uniformity of the thickness, shape, etc. of the foil is an important item of the quality. In recent years, the demand for the uniformity has become more severe. Its control has become one of the important management items of aluminum foil production.

[0004] The aluminum foil is rolled from an aluminum material to form a foil, which is wound into a coil.

[0005] The rolling mill in this case has a roll width of 2000 mm, and is supported and rotated only at both ends thereof. Therefore, the thickness in the width direction tends to vary, but this variation is conventionally measured. The surface of the coil winding surface wound off-line is measured by a contact method.

[0006] In this case, there is a problem that the foil surface is scratched, but the biggest problem is that the coil shape is measured after winding, so feedback to the aluminum foil during rolling is obtained. This is a large delay and a large amount of off-spec products.

[0007] The non-uniformity of the shape and thickness of the foil is non-uniform because the shape of the coil becomes uneven, such as a drum-shaped or swollen central portion, even within the allowable range of the specification. In addition, the slitter causes a decrease in productivity due to a decrease in speed, and a decrease in quality such as wrinkles.For the control of the rolling process, the coil shape is continuously measured during the rolling process, and abnormalities are found. In such cases, there is an increasing need to provide that data as soon as possible.

[0008]

When an aluminum material is rolled and the aluminum foil is rolled, 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 improve productivity. In order to detect deterioration in quality due to deterioration, wrinkles, etc. as early as possible,
In particular, an object of the present invention is to develop a method for making the shape of a coil uniform in order to prevent the thinning of the foil at the time of rewinding and an apparatus therefor.

[0009]

SUMMARY OF THE INVENTION The present invention provides: (1) When a film-like material is continuously manufactured and wound into a coil, the distance between the non-contact distance sensor and the coil winding surface is determined. Using a plurality of non-contact type distance sensors attached to a sensor support that automatically and automatically maintains an appropriate distance, the surface shape of the coil winding surface to be wound is continuously measured. A coil shape measuring method, and (2) in a film-like material winding device, a sensor support provided with a plurality of non-contact type distance sensors in a width direction of the film-like material is provided, and a winding amount of the film-like material is reduced. Accordingly, a sensor support position control mechanism capable of automatically maintaining the distance between the non-contact type distance sensor and the coil winding surface in a non-contact and automatic manner close to the coil winding surface is provided. Coil type The above object was achieved by developing a shape measuring device.

[0010] The film-like material of the present invention is not particularly limited as long as it can be wound and handled 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 that information back to the manufacturing process of the coiled product, directly linking not only to the prevention of off-spec, but also to the prevention of productivity reduction and the occurrence of wrinkles etc. It is effective in preventing trouble. This is a very effective measurement method for the production of aluminum foil.

Hereinafter, only the aluminum foil will be described, but it goes without saying that the coil shape can be measured in the same manner 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 into a coil around a core 5 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 operation 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 distance sensors 6 provided on the sensor support near the 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 is usually between about 6 and 20. If the number is less than 6, the shape of the entire coil is likely to be insufficiently grasped depending on the width of the aluminum foil. 20
When the number exceeds the number, the accuracy of the measured value is improved, if at all, to a small degree, and there is not much economical advantage. Therefore, there is no upper limit, but this is sufficient.

Since the non-contact type distance sensor 6 has a maximum unevenness of the coil 4 of about 0.1 mm, a high detection accuracy is required, and a detection accuracy of about 0.01 mm or more is desired. The non-contact distance sensor 6 having such a high detection accuracy usually needs to be set at a distance of 10 mm or less from the measurement point in order to maintain the sensor accuracy.

On the other hand, the roll diameter of the coil 4 varies depending on the thickness of the aluminum foil, the amount of winding, and the like. In industrial production, it is common practice to wind the core 5 to a thickness of about 400 mm. I have.

In the present invention, in order to maintain the most appropriate distance for the measurement of the non-contact distance sensor 6 at any time in response to such a large change in the coil winding surface, a plurality of non-contact distance sensors 6 are used. Is mounted on a sensor support 8 such as a bar, and a signal from the sensor or other means may be used to keep the distance between the winding surface and the sensor always within a suitable range. 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 to send a signal to the ironing roll 3 or the controller 10 of the rolling mill 1 for rolling. Machine control is performed.

In the above description, control of a rolling mill for aluminum foil has been described. However, the present invention merely relates to a method and an apparatus for measuring the shape of a coil. In the case of a die method, a plastic film or the like, the signal may be returned to the adjustment of the die slit, and the use method should be appropriately used for each field.

[0019]

[Function] In the manufacturing method of aluminum foil etc. that is continuously rolled at high speed, the difference in the uniformity of the thickness in the width direction is small, and it is measured unless a sample is collected by cutting and restarting. It is possible to measure the rolled aluminum foil coil off-line for reasons such as difficulties with the method, and adjust the rolling mill based on the results. Data feedback was slow.

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

In particular, the non-contact type distance sensor has an extremely small measurement allowable distance with respect to the movement distance of the measurement point (coil winding surface), and it is difficult to maintain an appropriate distance.
A non-contact distance sensor is installed on a sensor support, and the position of the measuring unit can be continuously controlled by means of a hydraulic cylinder, a pulse motor, or the like 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 the support is used at all times by a sensor signal or the like to maintain an appropriate distance from the coil winding surface. The purpose of this is to continuously measure the shape of the coil winding surface. The signal is input to a controller, and after calculation, the signal can be used for controlling aluminum foil rolling.

As a result, the measurement can be performed continuously, and there is no need to stop the operation, and the operating conditions are changed by the feedback data, or the shape of the coil winding surface is changed due to the changing of the operating conditions. The change can be measured continuously.

For this reason, in the production of aluminum foil, etc., 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 in quality such as wrinkles, etc. Foil production becomes possible.

[Brief description of the drawings]

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

FIG. 2 is a plan view of a part of a coil and a non-contact distance sensor of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Aluminum material 2 Rolling mill 3 Ironing roll 4 coil 5 Core 6 Non-contact type distance sensor 7 Hydraulic cylinder 8 Sensor support 9 Controller 10 Rolling mill controller

Continuation of the front page (56) References JP-A-2-13806 (JP, A) JP-A-1-214564 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01B 21 / 20 G01B 7/28 B21C 51/00

Claims (2)

(57) [Claims] When a film is continuously produced and wound into a coil, the distance between a non-contact distance sensor and a coil winding surface is automatically and automatically maintained at an appropriate distance. A method for measuring the shape of a coil, comprising continuously measuring the surface shape of a coil winding surface to be wound using a plurality of non-contact distance sensors attached to a sensor support. 2. A film winding device, comprising: a sensor support provided with a plurality of non-contact type distance sensors in a width direction of the film; A coil shape measuring device provided with a sensor support position control mechanism capable of automatically maintaining a proper distance between a coil winding surface and a non-contact type distance sensor in a non-contact manner and automatically with the coil winding surface. .