JP2004119922A - Wire-winding method of multi-wire coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for efficiently and accurately winding a multi-layer coil suitable for miniaturization of a product, and to provide a winding method of a multi-wire coil which can cope with multi-wire parallel windings. <P>SOLUTION: In the winding method of the multi-wire coil forming the coil, by winding a plurality of wire materials 20a and 20b around the bobbin 2 of a drum core 1, the twisting of the wire materials 20a and 20b of winding start, produced by using a plurality of winding nozzles 10a and 10b supplying the wire materials 20a and 20b is eliminated by simultaneously rotating the plurality of the winding nozzles 10a and 10b at the periphery of a prescribed rotation center Q. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for winding a multi-wire coil for winding a plurality of wires around a core to produce a coil (including a transformer).
[0002]
[Prior art]
Hitherto, as a coil winding method, a bifilar winding, a trifilar winding, and the like in which a plurality of wires are wound around a winding core in parallel have been known (for example, see Patent Documents 1 and 2 below).
[0003]
[Patent Document 1]
JP-A-8-236381 [Patent Document 2]
JP, 2002-33234, A
Forming a multilayer winding by winding a plurality of wires in layers one by one is well known as a winding method of a transformer or the like.
[0005]
[Problems to be solved by the invention]
Bifilar and trifilar windings, in which a plurality of wires are wound in parallel on a core, have features such as a short winding time because multiple wires can be wound at the same time. Is widened, which may hinder miniaturization of the product. In addition, the winding method of a multi-layered transformer, which is used in a multi-layer winding method, requires a long winding time due to the winding and terminal treatment of each layer, resulting in an increase in the cost of winding processing.
[0006]
In order to solve these problems, the present invention provides a method for efficiently and accurately performing winding of a multilayer coil suitable for miniaturization of a product, and a multi-wire capable of supporting a multi-wire parallel winding. An object of the present invention is to provide a method of winding a coil.
[0007]
Other objects and novel features of the present invention will be clarified in embodiments described later.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 of the present application relates to a method of winding a multi-wire coil in which a plurality of wires are wound around a core to form a coil.
The twisting of the wire at the beginning of winding caused by the use of a plurality of winding nozzles for feeding each wire is removed by simultaneously rotating the plurality of winding nozzles around a predetermined center of rotation.
[0009]
In the method of winding a multi-wire coil according to the invention of claim 2 of the present application, the method of claim 1 performs switching of a multilayer winding or a parallel winding by controlling a rotation amount of the plurality of winding nozzles. It is characterized by.
[0010]
The invention according to claim 3 of the present application relates to a method of winding a multi-wire coil in which a plurality of wires are wound around a core to form a coil.
In the case of using a plurality of winding nozzles for feeding out the respective wire rods, and performing the multilayer winding by rotating the winding core, a height difference is provided between the winding nozzles, and the timing at which the plurality of wire rods are wound is adjusted. , The upper layer is delayed from the lower layer.
[0011]
According to the invention of claim 4 of the present application, in claim 1, 2, or 3, a flange is formed at both ends of the core, and ends of the plurality of wires are located at different positions on the outer peripheral surface of the flange. Each is characterized by being fixed.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a winding method of a multi-wire coil according to the present invention will be described with reference to the drawings.
[0013]
A first embodiment of a method for winding a multi-wire coil according to the present invention will be described with reference to FIGS. The first embodiment is an example of a method for performing multilayer winding on a core.
[0014]
In FIGS. 1 and 2, reference numeral 1 denotes a drum core made of ferrite or the like, which has flanges 3 on both sides of a core 2. The drum core 1 is held (sandwiched) by a chuck 5 indicated by a virtual line, and is driven to rotate around the center axis P of the core 2 as the chuck 5 rotates.
[0015]
The plurality of winding nozzles 10a and 10b are supported by a rotatable nozzle holder 13 so as to be parallel to each other and to be vertically movable. A wire 20a is passed through the winding nozzle 10 and a wire 20b is passed through the winding nozzle 11 in advance, and the wire is fed from the lower end of the nozzle. These winding nozzles 10a and 10b are arranged substantially perpendicular to a plane including the center axis of the core 2. For example, if the center axis of the core 2 is in a horizontal plane, the winding nozzles 10a and 10b It is suitable. The rotation center axis Q of the nozzle holder 13 is parallel to the winding nozzles 10a and 10b, preferably passes through the midpoint between the winding nozzles 10a and 10b, and is substantially perpendicular to a plane including the center axis of the winding core 2. Accordingly, with the rotation of the nozzle holder 13, the plurality of winding nozzles 10a and 10b simultaneously rotate around the rotation center axis Q.
[0016]
The winding of the wires 20a and 20b around the drum core 1 is performed in the following procedure.
[0017]
First, the coil end position (position at which the end of the wire is fixed) is determined by the chuck 5, the winding nozzles 10a, 10b, etc., and the ends of the wires 20a, 20b are fixed to the drum core 1 by welding, crimping with metal fittings, or the like. Do. In the example of FIG. 1, the ends of the wires 20a and 20b are different from each other on the outer peripheral surface 4 of one of the flanges 3 of the drum core 1 (when the flange 3 is a rectangular flange, any one of the four surfaces). Each is fixed in position. The wires 20a and 20b before the start of the operation are prepared in a state of intersecting at the upper portions of the winding nozzles 10a and 10b in consideration of rotating the nozzle holder 13 later.
[0018]
Thereafter, the plurality of winding nozzles 10a and 10b and the nozzle holder 13 are moved to the winding start position, and the plurality of wires 20a and 20b are guided to the winding start position by the winding nozzles 10a and 10b. Immediately after the rotation of the drum core 1 by the chuck 5 to start winding, that is, immediately after the rotation of the drum core 1, when the drum core 1 is inclined by about 45 °, the plurality of wires 20a, 20b are moved from the winding nozzles 10a, 10b. As shown in FIG. 1 (A), they intersect before reaching the drum core 1. That is, the wire 20b crosses and passes over the wire 20a. As described above, if the winding is started in a state where the wires are twisted, the winding is misaligned, resulting in poor appearance and poor electrical characteristics.
[0019]
In order to solve this problem and provide a high-precision multilayer coil, in the present embodiment, immediately after starting the winding, the nozzle holder 13 supporting the winding nozzles 10a and 10b is replaced with the nozzle holder 13 shown in FIG. 1B, the wires 20a, 20b are arranged in parallel (in a plane perpendicular to the central axis of the core 2) by rotating the wire 20a at an angle of about 180 ° as shown in FIGS. With this operation, the wire 20b of the lower coil portion of the multilayer coil is positioned on the winding core 2, and the wire 20a of the upper coil portion is positioned on the wire 20b of the lower coil portion. By rotating and winding the drum core 1 with the chuck 5 while maintaining this positional relationship, a multilayer winding using a plurality of wires can be simultaneously wound on each layer. / 2 (in the case of two layers), a multilayer coil can be wound.
[0020]
Furthermore, in the present embodiment, as a measure for further stabilizing the multilayer winding and increasing the winding speed, FIG. 1C shows the state after the nozzle holder 13 shown in FIG. 1B rotates. Thus, the winding nozzle 10a is raised by about 10 mm with respect to the nozzle holder 13. In other words, a height difference of about 10 mm is provided between the winding nozzles. By this operation, the wire 20a of the upper coil portion is placed at a position separated from the wire 20b of the lower coil portion by an angle α of about 30 ° to 50 °. As a result, there is a difference in the angle at which the wires 20a, 20b contact the core 2 during the winding, and as a result, a time difference occurs in the winding timing of the wires 20a, 20b. In the case of FIG. 1C, the wire 20a of the upper coil is wound with a delay of about 30 to 50 ° after the wire 20b of the lower coil is wound. Due to the time difference between the winding timings of the upper coil and the lower coil, it is possible to obtain the same winding accuracy as when winding is performed for each layer.
[0021]
At the end of the winding of the wires 20a, 20b, the rotation of the drum core 1 is stopped, and the chuck holder 13 is rotated by about 180 ° to return to the state before the start of the winding. What is necessary is just to adhere to the outer peripheral surface 4 of the other flange part 3 by welding, crimping with metal fittings, etc.
[0022]
FIG. 3 is a sectional view of a multilayer coil obtained by performing multilayer winding on the winding core 2 of the drum core 1 according to the first embodiment.
[0023]
According to the first embodiment, the following effects can be obtained.
[0024]
(1) If the winding is started in a state where the wires are twisted, the winding will be misaligned, resulting in poor appearance and poor electrical characteristics. In the present embodiment, immediately after starting the winding, By rotating the nozzle holder 13 supporting the winding nozzles 10a and 10b from the state shown in FIG. 1A by about 180 ° as shown in FIG. 1B, a plurality of wires 20a and 20b can be arranged in parallel. . Thus, the wire 20b of the lower coil portion of the multilayer coil is positioned on the winding core 2, and the wire 20a of the upper coil portion is positioned on the wire 20b of the lower coil portion, resulting in poor appearance and poor electrical characteristics. , A multi-layer winding using a plurality of wires can be wound simultaneously with high precision on each layer, and the multi-layer coil can be wound in about 1/2 (in the case of two layers) of the winding method for each layer. Can be wound.
[0025]
(2) By providing a height difference between the plurality of winding nozzles, the contact angle between the winding core 2 and the plurality of wire rods to be wound differs for each layer, and the winding timing is set to the lowermost layer. Delay from the coil section to the top layer coil section. In this way, the winding speed of the multi-wire and multi-layer coils is simulated simultaneously, so that the winding speed is remarkably improved, and the same winding accuracy as when winding is performed for each layer can be obtained. It becomes possible.
[0026]
A second embodiment of the multi-wire coil winding method according to the present invention will be described with reference to FIGS. The second embodiment is an example of a method of performing bifilar winding as parallel winding on a winding core. As described in the first embodiment, an efficient multilayer winding can be realized by rotating the nozzle holder 13 by about 180 ° immediately after the winding of the drum core 1 is rotated by about 45 ° immediately after the winding is started. As described above, at this time, if the rotation of the nozzle holder 13 is limited to about 30 ° as shown in FIG. 4, the plurality of wires 20a and 20b are placed on the surface of the core 2 of the drum core 1. Positioned in parallel. That is, in the second embodiment, the nozzle holder 13 is rotated by about 30 ° from the state of FIG. 1A, and the wires 20a and 30b are parallel to the surface of the core 2 of the drum core 1. The bifilar winding can be performed as shown in FIG. 5 by setting the nozzle core to be fed out from the winding nozzles 10a and 10b and rotating the drum core 1 with a chuck.
[0027]
By providing a mechanism capable of controlling the amount of rotation of the nozzle holder 13 in this manner, the same device can support both multi-wire multilayer winding and multi-wire parallel winding. The number of required winding devices can be reduced, and the effects of reducing the amount of capital investment and the area occupancy of the devices can be obtained.
[0028]
FIG. 6 illustrates a third embodiment of the method of winding a multi-wire coil according to the present invention. In the first embodiment, a two-layer coil is manufactured using two winding nozzles. In the third embodiment of FIG. 6, the coil is supported by a rotatable nozzle holder 13 so as to be able to move up and down. By using the three winding nozzles 10a, 10b, and 10c to guide the wires 20a, 20b, and 20c, respectively, a three-layer coil can be manufactured. The winding procedure in this case conforms to the first embodiment of FIG. 1, and the same or corresponding parts as in FIG.
[0029]
FIG. 7 illustrates a fourth embodiment of the method for winding a multi-wire coil according to the present invention. In the second embodiment, a bifilar wound coil is manufactured using two winding nozzles. However, in the fourth embodiment shown in FIG. 7, the coil is supported by a rotatable nozzle holder 13 so as to be movable up and down. By using the winding nozzles 10a, 10b, and 10c to guide the wires 20a, 20b, and 20c, respectively, a trifilar wound coil can be manufactured. The winding procedure in this case conforms to the second embodiment of FIG. 4, and the same or corresponding parts as in FIG.
[0030]
Although the embodiments of the present invention have been described above, it will be obvious to those skilled in the art that the present invention is not limited to the embodiments and various modifications and changes can be made within the scope of the claims.
[0031]
【The invention's effect】
As described above, according to the method of winding a multi-wire coil according to the present invention, multi-wire, efficient and highly accurate winding of a multi-layer coil becomes possible, and at the same time as miniaturization of a product by the multi-layer coil, As a result, the processing cost can be reduced by shortening the winding time. Furthermore, since the same device can support both multi-wire multilayer winding and multi-wire parallel winding, it is possible to reduce the number of winding devices required for each winding specification, thereby reducing the amount of capital investment. , And the effect of reducing the area occupancy of the device can also be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a first embodiment of a method for winding a multi-wire coil according to the present invention.
FIG. 2 is a plan view of a winding nozzle and a drum core as viewed from above in the first embodiment.
FIG. 3 is a side sectional view of a multilayer coil provided with a multilayer winding according to the first embodiment.
FIG. 4 is a plan view of a winding nozzle and a drum core as viewed from above in a second embodiment of the present invention.
FIG. 5 is a side sectional view of a multi-wire coil provided with a parallel winding (bifilar winding) according to a second embodiment.
FIG. 6 is an explanatory diagram showing a third embodiment of the present invention.
FIG. 7 is a plan view of a winding nozzle and a drum core as viewed from above in a fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drum core 2 Core 3 Flange 5 Chuck 10a, 10b, 10c Winding nozzle 13 Nozzle holder 20a, 20b, 20c Wire rod

Claims (4)

In a multi-wire coil winding method of forming a coil by winding a plurality of wires around a core,
The twisting of the wire at the beginning of winding, which is caused by using a plurality of winding nozzles for feeding the wire, is removed by simultaneously rotating the plurality of winding nozzles around a predetermined rotation center. Wire coil winding method. The method of winding a multi-wire coil according to claim 1, wherein switching of a multilayer winding or a parallel winding is performed by controlling a rotation amount of the plurality of winding nozzles. In a multi-wire coil winding method of forming a coil by winding a plurality of wires around a core,
In the case of using a plurality of winding nozzles for feeding out the respective wire rods, and performing the multilayer winding by rotating the winding core, a height difference is provided between the winding nozzles, and the timing at which the plurality of wire rods are wound is adjusted. Wherein the upper layer is delayed more than the lower layer. 4. The multi-wire coil according to claim 1, wherein flanges are formed at both ends of the core, and ends of the plurality of wires are fixed to different positions on an outer peripheral surface of the flange. Winding method.

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