JPH11351832A - Entrailing air quantity measuring means for coil member and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately determine entrailing air quantity distribution to each winding and in a width direction by measuring a metallic foil thickness before winding and an outer diameter to each winding to calculate at a plurality points in the width direction. SOLUTION: An entrailing air quantity measuring device for a coil number B comprises, for example, a plurality of a thickness measuring sensor 5 arranged at predetermined intervals in a width direction and an outer diameter measuring sensor 7 placed at locations corresponding to the sensor 5 in the width direction. Then, the measuring device measures an outer diameter to each rotation of the coil member B by the sensor 7 to transmit with the diameter as an actual measured value to an air-gap rate calculating part 8 with continuously measuring a thickness of a metallic foil A by the sensor 5 to transmit data to an outer diameter calculating part 6. An outer diameter calculating part 6 calculates a theory outer diameter value from thickness data of the metallic foil A and a rotation number of a winding reel 1. An air-gap rate to each rotation at a plurality points in the width direction is determined from the actual measured outer diameter value and the theory outer diameter value at the calculating part 8, and control compared to a target air-gap rate is done.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for measuring the amount of air entrained in a coil material.

[0002]

2. Description of the Related Art When a metal foil is wound around a winding reel to form a coil material, if the amount of air to be wound is small, the adhesion of the metal foil surface in a subsequent annealing process is reduced. If the residual oil does not volatilize sufficiently, a degreasing failure occurs. Conversely, if a large amount of air is included between the metal foils and wound, the above-described problem does not occur, but the coil material sags, and the wound metal foils rub against each other, and There are problems such as scratches. Therefore, when a coil material is formed by winding a metal foil on a winding reel, it is necessary to accurately determine the amount of air so as to include an appropriate amount of air between the wound metal foils.

Conventionally, as one method of measuring the amount of air entrained in a coil material, a method of measuring the amount of air entrained from the result of winding the coil material as shown in FIG. 5 is known. . That is, the coil material (2
The outer diameter R of the coil material is measured at one location in the width direction of 1), and the coil is determined from the outer diameter R, the outer diameter r of the take-up reel (22), and the coil width w as shown in the following equation [2]. By calculating the volume of the material (21) and multiplying the volume of the coil material (21) by the specific gravity p of the metal foil, an apparent weight W assuming the coil material (21) as one lump is calculated.

W = {π (R ² −r ² ) / 4} × w × p [2] W: Apparent weight of coil material R: Outer diameter of coil material at one position in width direction r: Outer diameter of take-up reel w: coil width p: specific gravity of metal foil And actual weight W of wound coil material (21)
′, And the apparent weight W and the actual weight W ′ described above are measured.
Into the following equation, the coil material (21)
The porosity f, which is the ratio of the amount of air contained in the whole, is determined.

F = (W−W ′) / W (3) However, in this measuring method, the porosity f is obtained from the result of winding of the coil material (21).
The distribution of the entrapped air amount between the respective layers in 1) cannot be obtained. Further, since the outer diameter R is measured only at one location in the width direction of the coiled material (21), the coiled material (21) is measured.
There is a drawback that the distribution of the entrapped air amount in the width direction cannot be obtained.

Therefore, as another method of measuring the amount of air entrained in the coil material, a method of measuring a change in the amount of air entrained in the coil material during winding of the coil material is known.
That is, before winding the metal foil on the winding reel, the average thickness t of the metal foil and the outer diameter r of the winding reel are determined in advance, and the outer diameter theory of the coil material for each winding is calculated by the following equation. to calculate the value R _n.

Π / 4 × (R _n ² −r ² ) = t × 1 [4] R _n : theoretical outer diameter r: outer diameter of the take-up reel t: average thickness of metal foil l: Winding length Then, while the metal foil is being wound, the actual measured value R _n ′ of the outer diameter of the coil material is obtained for each winding of the metal foil by various sensors, and the measured outer diameter R _n ′ and the outer diameter are obtained. By substituting the theoretical value R _n into the following equation, the porosity f is obtained every time the metal foil is wound on the coil material, and the change in the porosity with the increase in the winding thickness of the coil material is examined.

F = (R _n ′ −R _n ) / R _n ′ [5] However, in this measurement method, the thickness of the metal foil used for calculating the theoretical outer diameter of the coil material is an average value of the whole. Therefore, the amount of entrained air cannot be determined accurately. Also,
There is a drawback that the distribution of the entrained air amount in the width direction of the coil material cannot be determined yet.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and is capable of accurately determining the distribution of the entrained air amount for each winding of the metal foil and the distribution of the entrained air amount in the width direction of the coil material. It is an object of the present invention to provide a method and apparatus for measuring the amount of air entrained in a coil material, which can be obtained well.

[0010]

According to the method for measuring the amount of air entrained in a coil material according to the present invention, the thickness at each position is continuously measured at a plurality of positions in the width direction of a metal foil before being wound on the coil material. measured, and determined the thickness average value t _n of the wrapped metal foil coil material per wrapped on the basis of the measured value, by substituting the thick-looking average value t _n in the following formula [1],

(Equation 2) Each wrapped in metal foil with obtaining the outer径理theory value R _n of the coil member, at a plurality of positions in the width direction of the coil material corresponding to the thickness measurement location, the outer diameter R of the coil member per wrapped metal foil 'actually measuring the outside径理theory value R _n and the outer diameter measured value R _n of the coil material' _n from the, at a plurality of positions in the width direction of the coil material, was involved in the coil material per wrapped metal foil It is characterized in that the ratio of the amount of air is calculated.

[0011] The idea of this measuring method is that the metal foil is wrapped singly every time the winding reel makes one rotation, so theoretically the outer diameter of the coil material increases by the thickness of the metal foil x 2; Although it should be represented as external径理theory value R _n of the above formula [1], in order to involve the air in the wrapped metal foil, the outer diameter measured value of the coil member R _n 'is the outer径理theory value It is greater than R _n. Therefore, the coil material in the case of obtaining the ratio of the outer径理theory value R _n and the outer diameter measured value R _n 'because entrained air volume, the ratio of air quantity more accurately, yet the coil material It is intended to be obtained also in the width direction.

That is, since the thickness of the metal foil wound on the take-up reel is slightly different, the thickness of the metal foil before being wound is continuously measured, and the metal foil is coiled. The average value of the thickness of the metal foil is obtained every time the metal foil is wound, and the theoretical outer diameter of the coil material is obtained with high accuracy. Further, the ratio of the amount of air in the width direction of the coil material is also determined by setting a plurality of locations for measuring the thickness of the metal foil and the outer diameter of the coil material in the width direction.

Thus, the distribution of the entrained air amount for each winding of the metal foil around the coil material and the distribution of the entrained air amount in the width direction of the coil material can be accurately obtained.

The above-mentioned measuring method comprises a thickness measuring means for continuously measuring the thickness at each of a plurality of positions in the width direction of the metal foil before being wound on the coil material; determine the thickness average value t _n of the wrapped metal foil timber for each wrapped, the above equation thick-looking average t _n [1]
And the theoretical outer diameter R of the coil material for each winding of the metal foil.
calculating means for calculating _n ; outer diameter actual measuring means for actually measuring the outer diameter R _n ′ of the coil for each winding of the metal foil at a plurality of positions in the width direction of the coil material corresponding to the thickness measurement points; From the theoretical outer diameter value R _n and the measured outer diameter value R _n ′,
At a plurality of positions in the width direction of the coil material, the measuring device can be executed by a measuring device including calculation means for calculating the ratio of the amount of air caught in the coil material every time the metal foil is wound.

Thus, the distribution of the entrained air amount every time the metal foil is wound around the coil material and the distribution of the entrained air amount in the width direction of the coil material can be accurately, easily and reliably obtained. . In particular, if a control device or the like for changing the winding conditions is connected to this measuring device, the amount of air to be wound can be adjusted during winding of the metal foil, and a flexible response can be achieved.

[0016]

1 to 3 show one embodiment of an apparatus for measuring the amount of air entrained in a coil material according to the present invention.

As shown in FIG. 1, a strip-shaped metal foil (A) wound on an unillustrated unwind reel is guided by a guide roll (2) and wound on a take-up reel (1). It has become so.

The take-up reel (1) is connected to a motor (3) which is a power source of the take-up reel (1).
When the motor (3) is driven and the take-up reel (1) rotates in the direction of the arrow in FIG. 1, the metal foil (A) is continuously wound to form the coil material (B). A touch roll (4) is disposed in a pressed state on the coil material (B) so that the coil material (B) can be wound without slack. Further, the take-up reel (1) is provided with a rotation detector (not shown), and transmits a rotation signal to an outer diameter calculation unit (6) described later every rotation.

As shown in FIGS. 1 and 2, above the guide roll (2), three thickness measuring sensors (5) are arranged at predetermined intervals in the width direction. These thickness measuring sensors (5) continuously measure the thickness of the metal foil (A) moving on the lower guide roll (2), respectively, and transmit the data to an outer diameter calculating unit (6) described later. Things. The thickness measuring sensor (5) is ideally an ultra-high-precision laser displacement meter having a high resolving power in order to more accurately measure the thickness of the metal foil (A), but is not limited thereto. What is necessary is just a thing which can measure thickness continuously and with high precision like a high-precision contact-type displacement sensor or an X-ray thickness gauge.

The outer diameter calculating section (6) calculates the thickness data of the metal foil (A) transmitted from the thickness measuring sensor (5) and the winding reel (1) and the rotation speed n of the winding reel. each time coil material (B) makes one rotation, the outer径理theory value R _n is calculated, the porosity calculation section below the outer径理theory value R _n of the coil material (B) (8) in the width direction at three positions What to send.

That is, based on the thickness data transmitted from the thickness measurement sensor (5), the outer diameter calculation section (6) rotates the coil material (B) once and the metal foil (A) in a single winding. Each time the metal foil (A) is attached, the average thickness t _n of the metal foil (A) wound on the coil material (B) (n: number of rotations, n = 1, 2,
3)). Next, the average value t _{n of} the thickness and the number of rotations n of the coil material (B) are substituted into the following equation, and each time the coil material (B) makes one rotation and the metal foil (A) is single-wound, calculating the outer径理theory value R _n of the coil material (B). _If the calculation of the theoretical outer diameter value Rn is performed for the thickness measurement sensors (5) arranged at three places in the width direction, the coil material (B) makes one rotation and the metal foil (A) is single-wound. each, since the outer径理theory value R _n is determined in the width direction three coils material (B), and transmits them out径理theory value R _n to the porosity calculation unit will be described later (8).

Thus, instead of fixing the thickness of the metal foil (A) to a fixed value as in the conventional case, each time the coil material (B) rotates once and the metal foil is single-wound, the metal foil ( since obtaining the thickness average value of a), it is possible to calculate the outer径理theory value R _n accurately. For convenience of calculation of the outer径理theory value R _n, the cross-section of the coil material (B) as shown in FIG. 3, it is assumed to state the take-up reel periphery thin cylinder also Ikue covers.

Outer diameter measuring sensors (7) are arranged above the coil material (B) at three places in the width direction corresponding to the thickness measuring sensors (5). These outer diameter measuring sensors (7) are each provided with a lower coil material (B).
Is measured each time the outer diameter rotates once, and the measured outer diameter R _n
'Is transmitted to the porosity calculator (8) described later. The outer diameter measuring sensor (7) is not particularly limited as long as it can accurately measure the outer diameter of the coil material (B) such as a magnesrite scale, a visible light laser type displacement sensor, a high precision ultrasonic type displacement sensor, and the like. Not limited.

[0024] The porosity calculation unit (8) has an outer diameter calculation unit (6) and outer径理theory value sent from the outer diameter measuring sensor (7) R _n and an outer diameter measured value R _n 'the formula Substituting in [6], the porosity f is calculated every time the coil material (B) makes one rotation at three places in the width direction of the coil material (B).

F = {(R _n ′ −R _n ) / R _n ′} [6] f: porosity R _n : theoretical outer diameter R _n ′: actual measured outer diameter That is, the coil material (B ) Rotates once, the metal foil (A) is wrapped in a single layer. At this time, air is also wrapped together with the metal foil (A), and each metal foil (A) wrapped around the coil material (B) is wound. ), An air layer is formed. Therefore, the greater the outer diameter measured value R _n 'than the outer径理theory value R _n, the ratio of the difference corresponds to a porosity f is the ratio of the amount of air, every time the coil material one revolution by the above formula Porosity f
Ask for. Then, the calculation of the porosity is performed for three places in the width direction of the coil material (B) below the outer diameter measurement sensor (7), and each is transmitted to the comparison unit (9).

The comparison unit (9) compares the porosity f obtained by the above calculation with the desired target porosity f0, and if they match, continues the winding operation under the winding conditions as it is. If they do not coincide with each other, a signal is transmitted to the control unit (10) provided on the output side of the comparison unit (9) to change the winding condition of the coil material (B) to change the porosity f to the target porosity. f0
Control to match. For example, when the porosity f is larger than the target porosity f0, a signal is transmitted to the control unit (10), and the control unit (10) transmits the signal to the touch roll (4).
The calculated porosity f is controlled so as to coincide with the target porosity f0 by increasing the pressing force and adjusting the torque of the take-up reel (1). Conversely, if the calculated porosity f is smaller than the target porosity f0, the control unit also reduces the pressing force of the touch roll (4) and adjusts the torque of the take-up reel (1), thereby calculating the porosity. The porosity f is controlled so as to coincide with the target porosity f0.

In the above description, "coincidence" is used to mean that when the target porosity f0 has a predetermined width, the calculated porosity f falls within the range. It is also desirable from the standpoint of improving work efficiency that the winding conditions be controlled automatically according to the result of comparison between the calculated porosity f and the target porosity f0 as described above. However, the present invention is not limited to this method. For example, the calculated porosity f is displayed on a display, and the winding conditions are manually controlled so that the calculated porosity f matches the target porosity f0 while checking the display. It may be a thing.

Next, a method for measuring the amount of air entrained in a coil material using this apparatus will be described with reference to the flowchart shown in FIG.

First, by driving the motor (3) and rotating the take-up reel (1) in the direction of the arrow in FIG. 1, the metal foil (A) is wound while being pressed by the touch roll (4). .

Then, the thickness of the metal foil (A) at three locations in the width direction is continuously measured by the three thickness measurement sensors (5), and the measurement data is transmitted to the outer diameter calculation unit (6). The three outer diameter measurement sensors (7) measure the outer diameter of the coil material (B) at three locations in the width direction each time the coil material (B) makes one rotation, and as a measured outer diameter R _n ′, a porosity calculator ( Send to 8). Further, every time the coil material (B) makes one rotation, a signal is transmitted to the outer diameter calculation unit (6) by a rotation detector (not shown) provided on the take-up reel.

Next, in the outer diameter calculating section (6), the thickness data of the metal foil (A) transmitted from the thickness measuring sensor (5) and the winding reel (1) and the rotation speed n of the winding reel are described. by substituting the above equation [1], each time the coil material (B) makes one rotation, calculates the outer径理theory value R _n of the coil material (B) in the width direction three, outer径理theory value R
_n is transmitted to a porosity calculator (8) described later.

Then, the porosity calculator (8) substitutes the theoretical outer diameter value R _n and the measured outer diameter value R _n ′ into the above equation [6], whereby the coil material (B) makes one rotation. Each time, the porosity f at three places in the width direction of the coil material (B) is obtained and transmitted to the comparison unit (9).

The comparator (9) to which the porosity f has been transmitted compares the calculated porosity f obtained by the above calculation with the desired target porosity f0. And the control unit (10) provided at the output side of the comparison unit (9)
Thereby, the pressing force of the touch roll (4) is increased and the torque of the take-up reel (1) is adjusted.

Thereafter, the above-mentioned operation is automatically repeated until the winding of the metal foil on the coil material (B) is completed, and every time the coil material (B) makes one rotation, the width of the coil material (B) is changed. Direction 3
The porosity f at the location is matched with the desired porosity f0.

As described above, the metal foil (A) before being wound
Leave measured thickness continuously, to the average value t _n of the thickness of the metal foil (A) each time the coil material (B) is one turn to metal foil (A) is wound around the coil material since calculating the outer径理theory value R _n of (B), it is possible to determine good air quantity distribution entrainment of each wrapped coil material (B) accuracy. In addition, since a plurality of measurement points are set in the width direction of the coil material (B) and the porosity in the width direction of the coil material (B) is calculated, the amount of air entrained in the width direction of the coil material (B) is calculated. The distribution can also be determined with high accuracy.

In the above embodiment, the porosity f is determined every time the coil material is rotated once and the metal foil is wrapped in a single winding. The rate f may be obtained. Further, the porosity f is obtained at three places in the width direction of the coil material, but the present invention is not limited to this, and the porosity f may be obtained at two or more places.

[0037]

According to the method for measuring the amount of air entrained in a coil material according to the present invention, the thickness at each position is continuously measured at a plurality of positions in the width direction of the metal foil before being wound on the coil material. and, the thickness average value t _n of the metal foil which is wrapped coil material based on the measurement value obtained for each wrapped substitutes thick-looking average value t _n in the following formula [1],

(Equation 3) Each wrapped in metal foil with obtaining the outer径理theory value R _n of the coil member, at a plurality of positions in the width direction of the coil material corresponding to the thickness measurement location, the outer diameter R of the coil member per wrapped metal foil 'actually measuring the outside径理theory value R _n and the outer diameter measured value R _n of the coil material' _n from the, at a plurality of positions in the width direction of the coil material, was involved in the coil material per wrapped metal foil Since the feature is to calculate the ratio of the air volume, the distribution of the wrapped air volume for each winding of the metal foil on the coil material and the distribution of the wrapped air volume in the width direction of the coil material are accurately determined. Can be asked well. For this reason, by the distribution of the entrained air amount for each winding, it is possible to prevent the degreasing failure that occurs when the entrained air amount is small and the loosening and coil sagging of the coil material that occurs when the air amount is large. .
In addition, by the distribution of the entrained air amount in the width direction of the coil material, it is possible to prevent the generation of wrinkles in the width direction of the coil material caused by poor contact between the coil material and the touch roll,
It is possible to produce high quality metal foil.

The coiled air amount measuring device for realizing the above-mentioned measuring method is capable of continuously measuring the thickness at each position at a plurality of positions in the width direction of the metal foil before being wound on the coil material. A thickness measuring means for measuring, and a thickness average value t _n of the metal foil wound on the coil material based on the measured value.
Is calculated for each winding, and the thickness average value t _n is substituted into the above equation [1] to calculate a theoretical outer diameter value R _n of the coil material for each winding of the metal foil. at a plurality of positions in the width direction of the corresponding coil material, and the outer径実measuring means for measuring the outer diameter R _n 'of the coil for each wrapped in metal foil, the outer径理theory value R _n and the outer diameter measured value of the coil material R _n ′, at a plurality of locations in the width direction of the coil material, at a plurality of locations in the width direction of the coil material, a calculating means for calculating the ratio of the amount of air caught in the coil material for each winding of the metal foil. Therefore, the distribution of the entrained air amount for each winding of the metal foil on the coil material and the distribution of the entrained air amount in the width direction of the coil material can be accurately, easily, and reliably obtained. For this reason, if a control device or the like for changing the winding condition is connected to this measuring device, the amount of air to be wound can be adjusted during winding of the metal foil, and a flexible measure can be taken.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of an apparatus for carrying out the present invention.

FIG. 2 is a plan view of the apparatus of FIG.

FIG. 3 is a virtual diagram of a coil material when calculating a theoretical outer diameter value.

FIG. 4 is a flowchart of a method for measuring the amount of entrained air according to the present invention.

FIG. 5 is a conceptual diagram for implementing a conventional air entrapment measuring method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Take-up reel 2 ... Guide roll 4 ... Touch roll 5 ... Thickness measurement sensor 7 ... Outer diameter measurement sensor A ... Metal foil B ... Coil material

Claims (2)

[Claims] 1. A method for measuring the thickness of a metal foil at a plurality of locations in the width direction of a metal foil before being wound on the coil material continuously, and based on the measured value, the metal wound on the coil material. determine the thickness average value t _n of the foil for each wrapped substitutes thick-looking average value t _n in the following formula [1], equation 1] Each wrapped in metal foil with obtaining the outer径理theory value R _n of the coil member, at a plurality of positions in the width direction of the coil material corresponding to the thickness measurement location, the outer diameter R of the coil member per wrapped metal foil _n ´
Was measured, and from the outer径理theory value R _n and the outer diameter measured value R _n 'of the coil member, at a plurality of positions in the width direction of the coil material, the amount of air caught in the coil material per wrapped metal foil The method for measuring the amount of air entrained in a coil material, comprising calculating the ratio of 2. A thickness measuring means for continuously measuring the thickness at each of a plurality of positions in the width direction of the metal foil before being wound on the coil material, and winding on the coil material based on the measured value. determine the thickness average value t _n of wearing metal foil each wrapped, substituted in the above formula [1] a thick-looking average value t _n, outer径理theory value R _n of the coil member per wrapped metal foil Calculating means for calculating the outer diameter R _n ′ of the coil for each winding of the metal foil at a plurality of positions in the width direction of the coil material corresponding to the thickness measurement points; since the outer径理theory value R _n and the outer diameter measured value R _n ', at a plurality of positions in the width direction of the coil material, and calculation means for calculating the ratio of the amount of air caught in the coil material per wrapped metal foil An apparatus for measuring the amount of air entrained in a coil material, comprising: