JPS5928977B2 - How to wind the core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for winding a wound core, and more particularly to a method for winding a wound core that allows the wound core to be smoothly wound into a coil.

In a wound core type transformer, a cut core is generally used to incorporate the wound core into a pre-wound coil.

That is, a wound core is made by winding a silicon steel strip, the wound core is cut at one or two places, and is assembled into a pre-wound coil. It is configured to be assembled by tightening from the outer periphery. However, in such a cut core, there is a cut part, which reduces the magnetic properties of the silicon steel strip.On the other hand, in order to prevent the decline in magnetic properties, the silicon steel strip is directly wound around a pre-formed coil. There are ways to go. For example, there is a method in which a silicon steel strip is tightly wound into the shape of a spirally wound core and shaped, and the shaped core is wound sequentially onto the outer periphery of the coil from the outermost end of the shaped core. However, according to this method, since the outer peripheral end and the inner peripheral end are opposite to those of the wound core that was first shaped, mechanical strain remains in the silicon steel strip. In order to eliminate this drawback, the inventors have previously developed a method in which the wound core, which has been initially shaped, is wound around the coil legs in its wound state. That is, a drive roller that applies rotational force to the wound core that can follow the wound core while contacting the outermost periphery of the wound iron core is arranged on one side of the iron core roller on which the wound iron core is wound, and a driving roller that applies rotational force to the wound iron core that can follow the wound iron core while contacting the outermost periphery of the wound iron core, and a coil , and core guide poles are placed on both sides of the legs of this coil to define the diameter of a large circle created when the outermost peripheral end of the wound core passes through the legs of the coil and is temporarily fixed to the outermost periphery of the wound core. This method uses a wound core winding device having a configuration in which an arc-shaped core guide is arranged within the large circle. However, when the core is actually wound into a coil using the winding device configured as described above, the torque of the drive roller is sufficiently absorbed by the friction between the core layers stacked and stored inside the outermost wound core. The drive b-
It has been found that if an attempt is made to rotate the roller forcibly and the pressing force is increased, the brake may be applied to the drive roller and the roller may stop.

On the other hand, the wound core that has been stretched out into a large circle is always subject to a force that causes it to contract inward, but when the pressing force of the drive roller mentioned above is weakened, the large circular wound core immediately contracts, causing each part to contract. It was also found that friction could occur. Therefore, the present invention has been made in view of the above points, and it is possible to smoothly wind the first shaped wound core directly around the coil legs, and to make it possible to wind the winding core directly onto the coil legs. It is an object of the present invention to provide a method for winding a wound core in which each of the wound cores can be simultaneously wound around a leg portion.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view for clearly explaining the overall structure of the present invention, and FIG. 2 is a front view showing the entire device for actually winding. FIG. 3 is a plan view of FIG. 2. In the figure, reference numeral 1 denotes a guide cover serving as a mounting plate, and in this guide cover 1 is placed a wound core 3, which is formed by winding a silicon steel plate around a support winding frame 2, before being wound into a coil, the details of which will be described later. This wound core 3 is rotatably arranged relative to the guide cover 1 by the support roller 2a of the support winding frame 2 arranged at its innermost periphery. Further, the support frame 2 and the support roller 2a are removably disposed on the guide cover 1. Here, guide cover 1 is the third
As is clear from the figure, they are arranged on both sides of the wound core 3 and support both ends of the support roller 2a. A coil 5 is fixedly supported on the guide cover 1 by winding a conducting wire in advance so as to have a substantially circular cross section.

One side leg portion 5a of this coil 5 is arranged and fixed so as to face the wound iron core 3. Then, core guide poles 6 are arranged on both outer sides of the leg portion 5a. This core guide pole 6 is rotatably attached to the guide cover 1. Reference numeral 7 denotes a guide roller of a winding belt 8, the details of which will be described later, and is rotatably attached to the guide cover 1.

Reference numeral 9 denotes a drive roller that rotates the winding belt 8.

On the other hand, 33 is a wound core before being wound into the aforementioned coil 5, which is made by winding a silicon steel plate around the supporting winding frame 32.
3 is rotatably arranged with respect to the guide cover 1 by a support roller 32a of the support winding frame 32 arranged at its innermost circumference. The support frame 32 and the support roller 32a are removably disposed on the guide cover 1.
The wound core 33 arranged in this manner is arranged so as to face the leg portion 5b on the other side of the coil 5. Core guide poles 36 are arranged on both outer sides of the leg portion 5b and rotatably attached to the guide cover 1. Reference numeral 37 designates a guide roller for the padded belt 8, which is rotatably attached to the guide cover 1. 10 is a tensioning device that applies tension to the winding belt 8, as is clear from FIG.
A weight 10a is suspended from the drive roller 9.

The drive roller 9 can move upward and downward along a guide 10b. 11 is a drive device such as a variable speed gear motor that provides rotational force to the drive roller 9 through a drive belt 12. to rotate the drive roller 9. The winding belt 8 applies a rotational force to the winding cores 3 and 33 in order to simultaneously wind the winding cores 3 and 33 onto both legs 5a and 5b of the coil 5, respectively. , it will become more obvious. 13 and 38
indicates the outermost peripheral layer of the wound cores 3 and 33 when unwinding, and the outermost peripheral layers 13 and 38 form a large circle passing through the legs 5a and 5b of the coil 5.

Then, the end portions of the outermost peripheral layers 13 and 38 are overlapped with the respective outermost peripheral layers 13 and 38, and the overlapping portions are fixed to form temporarily fixed portions X and Y. Next, the operation of the present invention will be explained with reference to the drawings.

As shown in Fig. 2, the wound core 3 is shaped and rolled in advance.
is rotatably placed on the guide cover 1 together with the support winding frame 2 and the support roller 2a. Here, in FIG. 1, the position is changed by 900 to make the explanation easier to understand. Further, a coil 5 formed by winding a conducting wire around the guide cover 1 in advance is arranged and fixed such that one leg portion 5a thereof faces the wound iron core 3 and the other leg portion 5b faces the wound iron core 33, respectively. Next, the outermost peripheral layer 13, 38 of the wound core 3, 33
After passing the ends of the coil 5 through the one side legs 5a and 5b, the
Temporarily fix the parts. Through this temporary fixing, each wound core 3,
A large circle will be formed at 33. This large circle is maintained in a predetermined shape by the guide holes 6 and 36. Here, as shown in Fig. 2, a plurality of guide poles 6
It is preferable to hold it using a, 6b and 36a, 36b. Next, a common holding belt 8 is attached to the outer periphery of this large circle. The compression belt 8 is connected to the above-mentioned iron-saving cores 3, 3.
It is formed into an endless shape so as to be in contact with the outermost circumferential layers 13 and 38 of No. 3 which are spaced apart from each other, and to be in contact with the guide rollers 7 and 37, and to be in contact with the drive roller 9. In this way, winding and setting of the wound cores 3, 33 onto the legs 5a, 5b of the coil 5 is completed. Next, when the drive device 11 is rotated in the direction of the arrow in the figure, the drive roller 9 is rotated via the first drive belt 12, and the winding belt 8 is rotated in the direction of the arrow in the figure. As a result, the wound cores 3, 33
Since tension is applied to the outermost circumferential layers 13, 38 by the tension applying device 10), the wound cores 3, 33 rotate in the direction of the arrow due to frictional force. As the drive device 11 continues to rotate, the wound cores 3 and 33 gradually change from the outer circumferential layer to the outermost circumferential layer 1 of a large circle.
3, 38, and passes through the legs 5a and 5b of the coil 5. Finally, the wound cores 3 and 33 are all wound into a large circle. That is, wound core 3,3
3 is rolled up in a large circle with the same thickness. At this point, the rotation of the drive device 11 is stopped, and the support winding frames 2 and 32 are removed from the guide cover 1 together with the support rollers 2a and 32a. Also, the guide poles 6, 6a, 6b and 36, 36a
, 36b are also removed. That is, only the legs 5a and 5b of the coil 5 are positioned within the large circle of the iron core. This allows the large circle to attempt to return to the shape of the pre-shaped core. Next, the temporary fixings X and Y of the large circular outermost layers 13 and 38 of the iron core are removed, and the drive device 11 is rotated again in the same direction as described above. As a result, the large circle is formed by the legs 5a and 5b of the coil 5 due to its own elasticity.
The layer 13, 38 of the iron core is wrapped around the iron core and is in contact with the outermost layer 13, 38 of the iron core with a frictional force. 7; Denbatakeji = te: year; Since the first driving roller 9 is lowered along the guide 10b by the weight 10a of the force imparting device 10, the winding belt 8 is constantly frictioned against the outermost circumferential layers 13 and 38. It can be rotated by applying force.

Finally, the retracting belt 8 is removed to complete the retracting work. In the above example, the temporary fixation was removed after the winding core was wrapped in a large circle, and the winding belt was rotated to tighten the rear leg. After that, by compressing the whole from the outermost layer of the large circle, the iron core can be wrapped around each coil leg. However, according to the above-mentioned method of rotating and tightening the belt, the core can be wound around both legs of the coil and tightened at the same time. As explained above, according to the present invention, two shaped wound cores can be simultaneously wound around a pair of legs of a coil formed by winding a conducting wire in advance, using a common winding belt. Since the cores are wound around the legs of the coil under the same conditions, the magnetic properties of each core can be made uniform, and the time required to wind the cores into the coil can be significantly reduced. It becomes possible to provide iron core type transformers.

The common winding belt makes it possible to wind the iron-saving core into a large circle with uniform winding force, so that the work can be carried out smoothly. Further, if the winding belt is used for short tightening, that is, wrapping around the legs, the working time can be further reduced. In the above embodiment, a single wide winding belt is used, but it is also possible to use a plurality of narrow winding belts arranged side by side.

[Brief explanation of drawings]

FIG. 1 is a perspective view for explaining the present invention, FIG. 2 is a front view showing a specific embodiment of the present invention, and FIG. 3 is a plan view of FIG. 2. 1... Guide cover, 2, 32... Support frame, 2a,
32a...Support roller, 3, 33...Wound core, 5.
... Coil, 5a, 5b... Leg part, 6... Guide pole, 7, 37... Guide roller, 8... Winding belt, 9... Drive roller, 10... Tension attached giving device,
11... Drive device, 12... Drive belt, 13,3
8... Outermost layer of wound core, X, Y... Temporary fixing part.

Claims (1)

[Scope of Claims] 1. A coil that is rotatably supported by first and second support devices, respectively, facing the first leg and the second leg of a coil formed by winding a conductive wire in advance, respectively. The molded first and second wound cores are placed respectively, and the outermost layers of the first and second wound cores are passed between the first and second leg portions of the coil, respectively, and then the outermost layers of the first and second wound cores are passed between the first and second leg portions of the coil, respectively. is fixed to the outermost layer of a predetermined large wound core to form first and second circles by the outermost layer of the wound core, and the large first and second circles formed by the outermost layer of each of the wound cores are opposed to each other. The first and second cores are rotated by a drive device to rotate a common winding belt that contacts the outer periphery of the core except for a part, thereby forming first and second circles formed by the outermost layer of the core. After winding the first and second wound cores around the first and second large circular inner surfaces, the driving device is stopped, and then the Remove the first and second support devices and then
and a large circle wrapped around the second winding core to the first winding of the coil.
and a method for winding the wound core around the second leg. 2. A patent claim in which the winding of a large circular core made by winding a wound core around a coil leg is carried out by compressing the entire large circle from the outside after removing the temporary fixation of the outermost circumferential layer. The method for winding the wound core according to item 1. 3. The scope of claim 1, in which the winding of the large circular winding core made by winding the winding core around the coil leg is carried out by rotating a winding belt after the temporary fixation of the outermost layer is removed. The method of winding the wound core as described. 4. The method for winding a wound core according to claim 1, wherein tension is constantly applied to the winding belt.