JPH0257690B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a winding control device for a wound core for a transformer.

[Conventional technology]

BACKGROUND ART Wound cores, which are formed by winding a strip material with excellent magnetic properties into a ring shape, are widely used as transformer cores. For example, as shown in FIGS. 7 and 8, the wound core 1 is obtained by winding a strip material whose width direction has been cut out in advance into a predetermined shape, and whose cross section is square or square. Rectangle (9th
(Fig. 10), stepped core (Fig. 10) or circular (Fig. 1
Figure 1) It has a shape. A cylindrical coil bobbin 2, which has been divided into two in advance, comes into pressure contact with the winding core 1 at the pressure contact surface 3, and by rotating the coil bobbin 2 with respect to the winding core 1, the coil bobbin 2 is wound (Fig. (not shown). There is also a cut core type in which the iron core is cut and separated at the coil insertion legs and inserted into a pre-prepared coil for assembly. The band material for the wound core shown in FIG. 11 has the shapes shown in FIGS. 12A and 12B.

[Problem that the invention seeks to solve]

When manufacturing the above-mentioned wound core, the strip material is wound on a winding jig, and when the wound thickness reaches a predetermined thickness, the winding operation is stopped to obtain the wound core. There is. Conventionally, such a predetermined thickness of the winding thickness is
For example, the determination is made based on the predetermined number of rotations of the winding jig, but since the thickness of the strip material is not always constant, the above predetermined number of rotations may be set a little higher, and the number of rotations of the take-up jig may be set slightly higher. Once the rotational speed has been reached, it is necessary to actually measure the winding thickness and, depending on the measurement results, perform post-processing to either proceed with the winding operation or remove the already wound strip material. . As a result, the winding work efficiency of the core winding is reduced and material loss occurs, which in turn causes damage to the transformer (winding core).
The problem was that it led to an increase in manufacturing costs.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the winding efficiency of a wound core, eliminate material loss, and reduce the manufacturing cost of a transformer (a wound core).

[Means for solving problems]

Means for solving the above-mentioned problems are shown in FIGS. 1A to 1D.

1A and 1B show a winding control device for a wound core obtained by winding a strip material cut out in advance into a predetermined shape in the width direction on a winding jig, and FIGS. 1C and 1D
The figure shows a winding control device for a wound core obtained by cutting a material into a predetermined-shaped strip using a slitting device, and then winding the cut-out strip around a winding jig.

In FIG. 1A, the thickness measuring means measures the thickness t _i of the strip to be wound at each predetermined rotational position of the winding jig, and the rotational position detection means detects the predetermined rotational position of the winding jig. do. Then, each time a predetermined rotational position of the winding jig is detected, the thickness cumulative calculating means cumulatively calculates the measured thickness ti, and the thickness comparing means calculates the cumulatively calculated thickness Σt _i to a predetermined thickness. Compare with _tR . As a result,
When the cumulatively calculated thickness Σt _i reaches a predetermined thickness t _R , the winding stop means stops the winding operation of the winding jig.

In FIG. 1B, running length measuring means for measuring the running length of the strip material is provided in place of the rotational position detecting means in FIG. 1A. In this case, the thickness cumulative calculation means cumulatively calculates the thickness of the strip material for each predetermined length of the measured running length.

In FIGS. 1C and 1D, cutout width control means for controlling the cutout width of the slitter device is added to those in FIGS. 1A and 1B, respectively. In this case, the cutout width control means controls the cutout width of the slitter device according to the cumulatively calculated thickness _Σti .

[Effect]

According to the means shown in FIGS. 1A and 1B described above, the cumulative thickness of the strip wound on the winding jig is always measured, and when this cumulative thickness reaches a predetermined thickness, the winding is started. Work stops.

Furthermore, according to the means shown in FIGS. 1C and 1D,
A strip having a predetermined shape is cut out from the material according to the cumulative thickness of the strip wound on the winding jig.

Therefore, the means shown in FIGS. 1A and 1B are suitable for manufacturing the wound core shown in FIG. 9, and the means shown in FIGS. 1C and 1D are suitable for manufacturing the wound core shown in FIGS. 10 and 11. .

〔Example〕

FIG. 2 is a schematic diagram showing a first embodiment of a winding control device for a wound core according to the present invention. In FIG. 2, a strip 12 from a raw material coil 11 (in this case, the raw material has already been formed on the strip) is wound onto a winding jig 14 via a tension adjustment mechanism 13. In this case, the winding jig 14 is, for example, as shown in FIG.
It is a wound core as shown in the figure, and especially the cross section is 9th.
Form something like the one shown in the figure. 15 is the strip material 12
This is a thickness gauge for measuring the thickness of a material, such as a differential transformer type, a capacitance type, or the like.
The output of the thickness gauge 15 is supplied to an A/D converter 191 of the control device 19. Further, 16 is a motor for driving the winding jig 14, and 17 is a rotation detector for detecting a predetermined rotational position of the winding jig 14, which are connected to an input/output interface 195 of the control device 19. . Furthermore, 18 is a drive motor 1
6 is the start switch, and is also the control device 1.
It is connected to the input/output interface 195 of 9.

The control device 19 is composed of, for example, a microcomputer, and includes, in addition to an A/D converter 191 and an input/output interface 195, a CPU 192, a ROM 193 for storing programs, etc., a RAM 194 for storing temporary data, etc.

The operation of the control device 19 shown in FIG. 2 will be explained with reference to the flowcharts shown in FIGS. 3 and 4.

The routine shown in FIG. 3 is an interrupt routine that starts when the start switch 18 is turned on. In step 301, the cumulative thickness T is cleared and the step
At step 302, turn on the drive motor 16 and step
At 303, this routine ends. In this way, the winding jig 14 rotates as shown by the arrow, and the winding operation of the strip material 12 begins.

When the winding operation of the strip material 12 starts as described above, the rotation detector 17 generates a detection pulse signal at each predetermined rotational position of the winding device 14, and as a result, the fourth
The interrupt routine shown in the figure is executed. In other words,
The routine shown in FIG. 4 is executed every time the winding jig 14 rotates once.

In the routine shown in FIG. 4, in step 401, the output of the thickness gauge 15 is A/D converted and taken in.
In step 402, the cumulative thickness T is set as T←T+ti. Next, in step 403, it is determined whether the cumulative thickness T has reached a predetermined value _tR . As a result, if T<t _R , the process proceeds directly to step 405 and T
≧, if t _R , drive motor 1 is activated in step 405.
Turn off 6 and proceed to step 405. In this manner, the winding operation is stopped when the cumulative thickness T of the wound strip 12 reaches the predetermined value _tR .

After the winding operation is stopped, the strip material 12 is cut manually or automatically to obtain the wound core shown in FIG. 7 or 8.

FIG. 5 is a schematic diagram showing a second embodiment of a winding control device for a wound core according to the present invention, and shows a slitter device 20 having one or two pairs of slitter blades in contrast to the components shown in FIG. and its drive motor 2
1 is added. That is, in this case, the material 12' from the material coil 11 is transferred to the slitter device 20.
The band material 12 is formed by cutting out the strip material 12, and then wound up on a winding jig 14. Therefore, for example, the 10th
It is suitable for manufacturing the stepped wound core shown in the figure and the circular cross-sectional wound core shown in FIG. The operation of the control device 19 shown in FIG. 5 is performed according to the routines shown in FIGS. 3 and 6.

In the routine of FIG. 6, step 601 is added to the flow of FIG. 4. In step 601, a cutting width is calculated by interpolating from a predetermined cutting curve (primary map) stored in advance in the ROM 193 based on the cumulative thickness T, and the driving motor 21 is controlled according to this cutting width to control the slitting width. The position of the slitter blade of the device 20 is changed in the width direction.

Thus, according to the second embodiment of the invention:
A wound core with a desired cross-sectional shape can be obtained.

In addition, as a means for measuring each thickness t _i , the length l ₀ of the traveling strip material corresponding to a predetermined rotation of the winding jig 14,
The thickness t _i may be estimated by measuring l ₁ , l ₂ , . . . In this case, a traveling length meter is provided in place of the rotation detector 17.

〔Effect of the invention〕

As explained above, according to the present invention, a predetermined winding thickness can be directly obtained without post-processing, and as a result, the winding work efficiency of the wound core is improved,
In turn, the manufacturing cost of the transformer (wound core) can be reduced.

[Brief explanation of drawings]

1A to 1D are block diagrams showing the basic configuration of the present invention, FIG. 2 is a schematic diagram showing a first embodiment of a winding control device for a wound core according to the present invention, and FIG.
4 is a flowchart showing the operation of the control device shown in FIG. 2, FIG. 5 is a schematic diagram showing a second embodiment of the winding control device for a wound core according to the present invention, and FIG.
Flow chart showing the operation of the control device shown in Fig. 7.
Figure 8 is an external view showing an example of a general wound core,
9, 10, and 11 are cross-sectional views showing examples of general wound cores, and FIG. 12 is a plan view showing an example of the strip material shown in FIG. 11. 1... Winding core, 2... Coil bobbin, 11...
Material coil, 12...Strip material, 12'...Material, 1
3... Tension adjustment mechanism, 14... Winding jig, 15...
...Thickness gauge, 16... Motor for driving the winding jig 14, 17... Rotation detector, 18... Start switch, 19... Control device, 20... Slitting device.

Claims (1)

[Scope of Claims] 1. A winding control device for a wound iron core obtained by winding a band whose width direction has been cut into a predetermined shape on a winding jig, comprising: a band material wound on the winding jig; a rotational position detection means for detecting a predetermined rotational position of the winding jig; and cumulative calculation of the measured thickness of the strip each time the predetermined rotational position is detected. a thickness comparison means that compares the cumulatively calculated thickness with a predetermined thickness; and a thickness comparison unit that compares the cumulatively calculated thickness with a predetermined thickness; A winding control device for a wound core, comprising: a winding stop means for stopping a winding operation. 2. In a winding control device for a wound core obtained by winding a strip material cut out in a predetermined shape in the width direction on a winding jig, the thickness of the strip material wound on the winding jig is measured. a thickness measuring means; a traveling length measuring means for measuring the running length of the strip material; and a thickness calculating means for cumulatively calculating the thickness of the measured strip material for each predetermined length of the measured running length. a cumulative calculating means; a thickness comparing means for comparing the cumulatively calculated thickness with a predetermined thickness; and a winding operation of the winding jig when the cumulatively calculated thickness reaches the predetermined thickness. A winding control device for a winding core, comprising: a winding stop means for stopping the winding; and a winding control device for a winding core. 3. In a winding control device for a wound iron core obtained by cutting a material into a band of a predetermined shape using a slitting device and then winding the cut out band on a winding jig, the method comprises: a thickness measuring means for measuring the thickness of the strip to be taken; a rotational position detection stage for detecting a predetermined rotational position of the winding jig; Thickness accumulation calculation means for cumulatively calculating the thickness; Cutting width control means for controlling the cutting width of the slitter device according to the cumulatively calculated thickness; a cutting width control means for controlling a cutting width of the apparatus; a thickness comparison means for comparing the cumulatively calculated thickness with a predetermined thickness; and a thickness comparing means for comparing the cumulatively calculated thickness with a predetermined thickness; A winding control device for a wound core, comprising: a winding stop means for stopping the winding operation of a winding jig. 4. A winding control device for a wound core obtained by cutting a material into a predetermined-shaped band using a slitting device, and then winding the cut out band on a winding jig, comprising: a thickness measuring means for measuring the thickness of the strip to be taken; a running length measuring means for measuring the running length of the strip; and a running length measuring means for measuring the running length of the strip; Thickness cumulative calculation means for cumulatively calculating the thickness of the material; Cutting width control means for controlling the cutting width of the slitter device according to the cumulatively calculated thickness; and a winding stop means that stops the winding operation of the winding jig when the cumulatively calculated thickness reaches the predetermined thickness. A winding control device for a winding core.