JP2001338815A - Gapped wound core and method of machining gap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately prevent peeling among the lamination of a tabular body constituting a gapped wound core by welding. SOLUTION: In a product, gaps G extending in the radial direction of a wound core body 1 with a peripheral surfaced 1a composed of the cylindrically wound and laminated tabular body and a pair of ring-shaped planes 1b, 1c formed at both end sections in the axial direction of the peripheral surface 1a are formed to the wound core body 1. The laminated mutual tabular bodies of the wound core body 1 are welded, and welding sections 3cs, 3ds having end faces on the same planes as the tabular-body end faces of the wound core body 1 facing the gaps G are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wound iron core having a gap and a method of machining a gap used in a current transformer, a transformer, a choke coil, a reactor, and the like.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a conventional method of preventing separation between lamination layers during gap processing of a core with a gap. In the figure, reference numeral 1 denotes a wound core body before a gap is formed by processing. The wound core body 1 is formed by winding and laminating a long magnetic plate into a cylindrical shape. Reference numeral 5 denotes an adhesive applied or impregnated to the annular flat surfaces on both side surfaces of the cylindrical core body 1. The gap between the laminations of the core body 1 composed of laminated magnetic plates is formed during and after the gap processing. This is to prevent it.

FIG. 6 is a perspective view showing a conventional gap machining method for a gap wound core. In the figure, reference numeral 1 denotes a wound core body to which an adhesive is applied or impregnated and fixed, and 4 denotes a gap processing device for forming a gap in the wound core body 1. The gap processing device 4 is a grindstone for processing a gap, a laser processing machine, or a water jet processing machine.

FIG. 7 is a perspective view showing a conventional wound iron core after gap processing. In the drawing, reference numeral 1 denotes a wound core body with a gap. The wound core body 1 has a predetermined gap G.
Is provided, and separation between the layers is prevented by the adhesion of the adhesive.

[0005]

The conventional method for machining a gap of a core with a gap is performed as described above, so that an adhesive must be used, installation of local exhaust equipment and disposal of wastes are required. There was a problem that it was necessary. In addition, it is not impossible to automate the application and impregnation of the adhesive, but it was difficult to maintain a certain condition of the adhesive, and it was difficult to remove the adhesive because it was fixed to the jig and tool, so it took a long time. Was difficult to drive automatically.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gap-wound core and a gap machining method capable of accurately preventing separation between laminations of plate-like bodies constituting a gap-wound core.

[0007]

According to a first aspect of the present invention, there is provided a gap-wrapped iron core comprising a plate-like body wound and laminated in a cylindrical shape, and a pair formed at a circumferential surface and at both ends in an axial direction thereof. In the one in which a gap extending in the radial direction is provided in a wound core body having an annular flat surface, a gap between the laminated plate bodies of the wound core body is welded, and the wound core body facing the gap is welded. A welded portion having the end face is provided on the same plane as the end face of the plate-like body.

[0008] In the wound core according to the second aspect of the present invention, the annular flat surface of the wound core main body forming the gap includes:
A welded part having the end face is provided on the same plane as the end face of the plate-shaped body of the wound core body facing the gap.

[0009] In the wound core according to the third aspect of the present invention, the welding has an end surface on both annular planes of the wound core body forming the gap and on the same plane as an end surface of the plate-shaped body of the wound core body facing the gap. Part is provided.

In a fourth aspect of the present invention, there is provided a wound core having a gap, which is formed of a plate-like body wound and laminated in a cylindrical shape, and has a peripheral surface and a pair of annular flat surfaces formed at both ends in the axial direction. In the one in which a gap extending in the radial direction is provided in the wound core body, the stacked plate bodies of the wound core body are welded to each other, and the same as the end face of the plate body of the wound core body facing the gap. A weld having a flat end face is provided.

According to a fifth aspect of the present invention, there is provided a core having a gap including a welded portion having an end surface flush with an end surface of a plate-shaped body of the core body facing the gap at an end surface of the core body forming the gap. It is provided at the edge.

[0012] In the wound core according to a sixth aspect of the present invention, the welded portion having the end face coplanar with the end face of the plate-shaped body of the wound core body facing the gap is formed on the end face of the wound core body forming the gap. It is provided at both ends.

According to a seventh aspect of the present invention, there is provided a wound core having a gap, wherein a welded portion having an end surface coplanar with an end surface of the plate-shaped body of the wound core body facing the gap extends in a radial direction of the wound core body. It is provided.

In the wound core according to an eighth aspect of the present invention, the welded portion having the end face flush with the end face of the plate-shaped body of the wound core body facing the gap extends from the inner peripheral portion to the outer peripheral portion of the wound core body. It is provided continuously.

A ninth aspect of the present invention provides a gap wound core comprising a plate-like body wound and laminated in a cylindrical shape, having a peripheral surface and a pair of annular flat surfaces formed at both ends in the axial direction. In the case where a gap extending in the radial direction is provided in the wound core body, welding portions for welding between the laminated plate-shaped bodies of the wound core body are provided at a plurality of circumferential positions in the wound core body. In addition, the laminated plate-shaped bodies of the wound core body are welded to each other, and a welded portion having the end face is provided on the same plane as the end face of the plate-shaped body of the wound core body facing the gap.

According to a tenth aspect of the present invention, there is provided a wound core having gaps, wherein welds provided at a plurality of circumferential positions on the wound core body are provided on an annular plane of the wound core body.

In the wound core according to an eleventh aspect of the present invention, the welded portions provided at a plurality of locations in the circumferential direction of the wound core body are provided on both annular planes of the wound core body.

In the wound core according to a twelfth aspect, the welded portions provided at a plurality of circumferential positions on the wound core body extend in the radial direction of the wound core body.

In the wound core according to the thirteenth aspect, the welded portions provided at a plurality of positions in the circumferential direction of the wound core body are continuously provided from the inner peripheral portion to the outer peripheral portion of the wound core body. is there.

In the gap machining method according to a fourteenth aspect of the present invention, when a gap extending in the radial direction is formed by machining in a wound core body made of a plate-like body wound and laminated in a cylindrical shape, Prior to the processing, the laminated plate-like bodies of the wound core body at the gap forming portion are welded to each other.

In the gap machining method according to a fifteenth aspect of the present invention, when forming a radially extending gap in a wound core body made of a plate-like body wound and laminated in a cylindrical shape, the gap is formed by machining. Prior to the processing, a welded portion is provided for welding between the laminated plate-shaped members of the wound core body in the gap forming portion, and the welded portion prevents separation between the laminated plate-shaped members, The gap is formed by processing a plate-like body and a welded portion to remove the same by processing.

In the gap machining method according to a sixteenth aspect of the present invention, when a gap extending in the radial direction is formed by machining in a wound core body made of a plate-like body wound and laminated in a cylindrical shape, Prior to processing, a welded portion for welding between the laminated plate bodies of the wound core body in the gap forming portion is provided, and after forming the welded portion, processing is performed while leaving a part of the welded portion. Thereby, the gap is formed while preventing the lamination of the plate-like bodies from peeling, and the lamination of the plate-like body after the gap processing is prevented by the remaining portion of the welded portion.

In the gap machining method according to a seventeenth aspect of the present invention, when a gap extending in the radial direction is formed in a wound core body made of a plate-like body wound and laminated in a cylindrical shape, the gap is formed. Prior to the processing, the welding portion for welding between the laminated plate-shaped bodies of the wound core body in the gap forming portion is made wider than the width of the gap extending in the radial direction of the wound core body. It is provided so as to extend in the radial direction of the wound core, and after the formation of the welded portion, the central portion of the width of the welded portion is processed while leaving both side portions, thereby preventing separation between the laminations of the plate-like body. The gap is formed while the gap is being formed, and the remaining portion of the welded portion is prevented from peeling off between the laminations of the plate-like body after the gap processing.

In the gap machining method according to an eighteenth aspect, the plate-like members are welded from the inner peripheral portion to the outer peripheral portion of the wound core body to form the welded portion.

In the gap machining method according to a nineteenth aspect of the present invention, the plate-like members are welded from the inner peripheral portion to the outer peripheral portion of the wound core body at the edge of the end surface of the wound core body forming the gap. Then, the welded portion is formed.

In the gap machining method according to a twentieth aspect of the present invention, there is provided a gap forming method comprising a plate-shaped body wound and laminated in a cylindrical shape and having a peripheral surface and a pair of annular flat surfaces formed at both ends in the axial direction. In forming a radially extending gap in the iron core body by processing, welding between the laminated plate-shaped bodies of the wound iron core body is performed at a plurality of circumferential locations on the wound iron core body to form welds. And forming a welded portion by welding between the laminated plate bodies of the wound core body at the gap forming portion, and forming welded portions at a plurality of circumferential locations on the wound core body. Forming the welded portion in the gap forming portion, and forming the welded portion in the gap forming portion after the step of forming the welded portion in the gap forming portion. By processing the contact portion is obtained so as to form a gap.

In the gap machining method according to the twenty-first aspect, the formation of the welded portions provided at a plurality of circumferential positions on the wound core body is performed on the annular plane of the wound core body.

In the gap machining method according to a twenty-second aspect, the formation of the welds provided at a plurality of circumferential positions on the wound core body is performed on both annular planes of the wound core body.

[0029] In the gap machining method according to the twenty-third aspect, the formation of welds provided at a plurality of circumferential locations on the wound core body is performed in the radial direction of the wound core body, and the welded portion is formed by the wound core body. Are formed so as to extend in the radial direction.

[0030] In the gap machining method according to the twenty-fourth aspect, the welded portion is formed by continuously welding from the inner peripheral portion to the outer peripheral portion of the wound core body at a plurality of positions in the circumferential direction of the wound core body. Things.

In the gap machining method according to a twenty-fifth aspect, the welding between the plate-like bodies is performed by laser welding.

[0032] In the gap machining method according to the twenty-sixth aspect, the welding between the plate-like bodies is performed by arc welding.

[0033] In the gap machining method according to the twenty-seventh aspect, a welding step of welding between the laminated plate bodies of the wound core body at the gap forming portion, and forming a gap by machining a welded portion in the welding step. And a forming step, wherein the forming step is automatically started in response to the end of the welding step.

In the gap machining method according to the twenty-eighth aspect of the present invention, there is provided a gap machining method comprising a cylindrically wound and laminated plate having a peripheral surface and a pair of annular flat surfaces formed at both ends in the axial direction. In forming a gap extending in the radial direction on the core body by processing, the gap between the laminated plate bodies of the wound core body is welded and wound at a plurality of circumferential locations on each annular plane of the wound core body. A first welding step of forming a continuous welded portion extending from the inner peripheral portion to the outer peripheral portion of the wound core body so as to extend in the radial direction of the core body, and forming a gap between the laminated plate bodies of the wound core body; A second welding step of forming a weld having a width wider than the gap, which is welded at the portion and extends in the radial direction of the wound core body and continues from the inner peripheral portion to the outer peripheral portion of the wound core body. And wherein the first and Upon completion of the second welding step,
A machining step of forming a gap by cutting a welded portion formed in the second welding step is automatically started.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 First Embodiment A first embodiment of the present invention will be described with reference to FIGS. FIG.
FIG. 4 is an external view in which continuous welding is performed on a side surface annular flat surface of a previously formed wound core. In the figure, reference numeral 1 denotes a wound core body, 2 denotes a welding device such as a laser welding machine, and 3a denotes a continuous welded portion provided on an annular plane on a side surface of the wound core body 1.

The wound core body 1 is formed by winding a long plate-like body made of a magnetic material into a cylindrical shape. The cylindrical core body 1 has a peripheral surface 1a that forms the outer periphery thereof, and the core body 1 is formed on annular flat surfaces 1b and 1c that form a pair of side surfaces that form the cylindrical end surface. A continuous welding portion 3a for welding and fixing between the stacked plate-like bodies is formed by a welding device 2 such as a laser welding machine.

FIG. 2 shows a case where a plurality of continuous welds are provided on an annular plane in a side surface portion of a wound iron core, and a gap wider than the gap width is provided in an annular plane in a side surface portion in a corresponding portion where a gap is formed by machining. FIG. 4 is an external view of a wound core provided with a continuous weld. In the figures, reference numeral 1 denotes a wound core body, 1a denotes a peripheral surface of the wound core body 1, 1b and 1c denote a pair of annular flat surfaces on both side portions of the wound core body 1, and 3a denotes an annular surface on one side surface of the wound core body 1. The continuous weld portions provided at a plurality of circumferential positions on the plane 1b, and the continuous weld portions 3b provided at a plurality of circumferential positions on the annular flat surface 1c on the other side surface portion of the wound iron core body 3;
c is a continuous welded portion having a width w larger than a gap width g provided on the annular flat surface 1b on both side surfaces of the wound core body 1,
Reference numeral 3d denotes a continuous welded portion having a width w larger than the gap width g provided on the annular flat surface 1c on both side surfaces of the wound core body 1.

As shown in FIG. 1, the welding portion 3a extends in the radial direction of the cylindrical wound core body 1 on the annular flat surface 1b on the side surface of the wound core body 1 by a welding device 2 such as a laser welding machine. Formed. As shown in FIG. 2, the welded portion 3a is continuously formed with a relatively narrow width from the outer peripheral portion to the inner peripheral portion of the annular flat surface 1b on the side surface portion of the wound core body 1, and such a welded portion 3a is formed. In the circumferential direction of the winding core body 1 having a cylindrical shape, a plurality of portions are arranged at intervals of 90 °, and three portions are arranged per annular plane 1b in the figure. Also, an annular plane 1
c, the welded portion 3b is the welded portion 3a on the annular flat surface 1b.
It is formed similarly to

As shown in FIG. 2, a relatively wide welded portion 3c, 3d is formed by a welding device 2, such as a laser welding machine, which forms the welded portion 3a, 3b. Are formed to extend in the radial direction of the cylindrical wound core body 1 on the annular flat surfaces 1b and 1c on the side surfaces of the core. As shown in FIG. 2, the welded portions 3 c and 3 d are continuously formed with a relatively wide width from the outer peripheral portion to the inner peripheral portion of the annular flat surfaces 1 b and 1 c on the side surface portion of the wound core body 1, and have a cylindrical shape. Each of the annular planes 1b, 1c together with the welded portions 3a, 3b arranged at a plurality of locations at every 90 ° in the circumferential direction of the wound iron core body 1,
, Three welds 3 in the annular plane 1b
a and the welded portions 3c form four welded portions 3a and 3c arranged at every 90 °. On the annular plane 1c, four welded portions 3b and 3d are arranged at every 90 ° by the three welded portions 3b and 3d. The individual welds 3b and 3d are formed. Here, the welds 3c,
3d is formed after the formation of the welds 3a, 3b.

FIG. 3 shows a continuous welded portion provided at a plurality of locations on the annular plane on the side surface portion of the wound core body and a continuous welded portion provided on the annular plane on the side surface portion and having a width larger than the gap width for forming a gap. It is a schematic diagram which processes. In the figure, 1 is a wound core body, 1a is a wound core body 1
Are a pair of annular flat surfaces on both side surfaces of the wound iron core body 1, and 3a are continuous welds provided at a plurality of circumferential positions on the annular flat surface 1b on one side surface of the wound iron core body 1. And 3b are continuous welds provided at a plurality of positions in the circumferential direction on the annular plane 1c on the other side surface of the wound core body 1, and 3c are gaps provided on the annular plane 1b on both side surfaces of the wound core body 1. The continuous welded portion having a width w larger than the width g, 3d is a gap width g provided on the annular flat surface 1c on both side surfaces of the wound core body 1.
3 shows a continuous weld with a wider width w. Reference numeral 4 denotes a processing device such as a grindstone.

As shown in FIG. 3, the welds 3a, 3b, 3 formed by the method described above with reference to FIGS.
c, 3d, the width w of the welded portions 3c, 3d is the gap G
It is set to be larger than the set width g of FIG.
The widths of a and 3b are set smaller than the width w of the welds 3c and 3d.

The processing device 4 such as a grindstone is used to form a gap G (FIG. 4) extending in the radial direction on the wound core body 1 composed of a plate-like body wound and laminated in a cylindrical shape. Part 3
The narrow strip portions 3cs, 3d on both sides in the width direction of c, 3d
s (FIG. 4), leaving a 3 cm thick central band in the width direction.
In addition to processing 3 dm, a laminated plate-shaped body of the wound core body 1 corresponding to the central thick band portions 3 cm and 3 dm of the welded portions 3 c and 3 d is processed. The processing performed by the processing device 4 such as a grindstone causes the gap G in the radial direction of the wound core body 1 to be removed by the removing action on the welded portions 3c and 3d during the processing.
(FIG. 4) is formed.

At this time, the central thick band portions 3 cm and 3 dm of the welded portions 3 c and 3 d and the corresponding plate-shaped body of the wound core body 1 are simultaneously processed by a processing device 4 such as a grindstone. The narrow strip portions 3cs and 3ds (FIG. 4) on both sides in the width direction of the welded portions 3c and 3d remaining after the working and facing the gap G (FIG. 4) remain after the working and have a gap G ( FIG. 4) is formed to form the same plane as the plate-shaped body facing this gap.

FIG. 4 is an external view of the wound core after the gap processing. In the figure, reference numeral 1 denotes a wound core body, 1a denotes a peripheral surface of the wound core body 1, 1b and 1c denote pairs of annular flat surfaces on both side portions of the wound core body 1, and G denotes a radial direction of the wound core body 1. The gap, 3a, is a continuous welded portion provided at a plurality of positions in the circumferential direction on the annular plane 1b on one side surface of the wound core body 1, and 3b is the circumferential welded portion on the annular plane 1c on the other side surface of the wound core body 1. The continuous welded portions provided at a plurality of locations in the direction 3c are continuous welded portions having a width w larger than the gap width g provided on the annular flat surface 1b on both side portions of the wound core body 1, and 3d is a continuous welded portion of the wound core body 1. Gap width g provided on annular flat surface 1c on both side surfaces
This is a continuous weld having a wider width w. Here, both side narrow strip portions 3c in the width direction of the continuous welded portions 3c, 3d
Since s and 3ds remain, this indicates that there is no separation between the laminations of the plate-like bodies constituting the wound core body 1 in the gap portion G.

The wound core body 1 having the gap G is mounted on a workbench (not shown) with its annular planes 1b and 1c up and down, and the gap G is a cylindrical winding. It is formed by processing and removing a part of the peripheral surface of the iron core body 1 by vertically penetrating from the inner peripheral part to the outer peripheral part. The wound core body 1 has a C-shaped horizontal cross section.
Has a rectangular end face composed of a processed cross section of the laminated magnetic plate and a processed cross section of the welded portion 3cs. The rectangular end face faces the gap G and faces the magnetic portion of the wound core body 1 and the gap G. It forms a critical end face that separates the gap. One of the end faces at both ends of the C-shape has a welded portion 3cs at the upper end edge of the end face, and has a welded portion 3ds at the lower end edge of the end face. The other also has a weld 3cs at the upper edge of its end face, and a weld 3cs at the lower edge of its end face.
ds.

In the first embodiment according to the present invention, continuous welding is performed on the side surface of the wound core at a plurality of locations on the upper and lower sides, for example, as shown in FIG. Do. Then, even if gap processing is performed as shown in FIG. 3, the continuous welding portions at a plurality of side surfaces can prevent peeling between the layers during processing. In addition, the gap processed portion can be prevented from being peeled off by a continuous welded portion having a width wider than the processed width.

Then, even after processing as shown in FIG.
Continuous welding prevents peeling between layers. As a result, it became possible to process a wound core with almost no shape deformation after gap processing. As a result, it is possible to accurately fix the wound iron core during and after gap processing without using an adhesive, and to maintain an appropriate shape.

Here, the manufacturing process of the wound iron core including the welding process and the working process is summarized as follows. In the following (1) steps S1 to (7) step S7, (1) step S1 is the first step, and (2) step S2
(3) Step S3... Are sequentially processed with time,
(7) A time series process in which step S7 is the final process is shown. A. Preparation Step (1) Step S1: A plate-like body made of a long material of a magnetic material constituting the wound core body 1 is wound into a cylindrical shape and laminated. The wound core body 1 is formed with a pair of annular flat surfaces 1b and 1c on both sides of the circumferential surface 1a and the wound core body 1. B. Welding process (2) Step S2: An annular flat surface 1 of a wound core body 1 in which a plate-shaped body made of a long material of a magnetic material is wound into a cylindrical shape and stacked.
b, a welded portion 3a is formed continuously from the inner peripheral portion to the outer peripheral portion of the cylindrical wound core body 1. (3) Step S3: An annular flat surface 1 of a wound core body 1 in which a plate-shaped body made of a long material of a magnetic material is wound into a cylindrical shape and stacked.
c, a welded portion 3b is formed continuously from the inner peripheral portion to the outer peripheral portion of the cylindrical wound core body 1. (4) Step S4: On the annular flat surface 1b of the wound core body 1,
A welded portion 3c having a relatively wide width w is formed continuously from the inner peripheral portion to the outer peripheral portion of the cylindrical wound core body 1. (5) Step S5: On the annular plane 1c of the wound core body 1,
A welded portion 3d having a relatively wide width w is formed continuously from the inner peripheral portion to the outer peripheral portion of the cylindrical wound core body 1. C. Machining process (6) Step S6: Machining device 4 made of whetstone (FIG. 3)
By rotating a cutting tool made of the disc-shaped grindstone and abutting the cutting tool on a portion to be processed of the wound iron core body 1, the central thick band-shaped portion 3cm of the welded portions 3c and 3d of the wound iron core body 1 is used. 3 dm (FIG. 3) and the corresponding plate-like body portion of the wound core body 1 corresponding to this are cut. The gap G extending in the radial direction of the cylindrical wound core body 1 by the removing action on the portion to be processed by the cutting process (FIG. 4).
Is formed. (7) Step S7: In the finishing process, the welding portion 3
The cut end face facing the gap G (FIG. 4) of c and 3d is formed in the same plane as the cut end face facing the gap G (FIG. 4) of the wound core body 1, and both are combined. A critical end face in a rectangular shape is formed which separates the magnetic portion of the wound core body 1 facing the gap G (FIG. 4) and the void portion of the gap G.

In the embodiment according to the present invention, a laser welding machine is used as the welding device 2. However, another type of welding machine such as an arc welding machine can be used. In the embodiment according to the present invention,
Although the apparatus using a grindstone has been described as the processing apparatus 4, other types of processing machines such as a laser processing machine and a water jet processing machine can also be used.

According to the first embodiment of the present invention, a pair of annular flat surfaces 1 formed of a plate-like body wound and laminated in a cylindrical shape and formed at both ends in the axial direction thereof are formed.
welding parts 3a and 3b for welding between the laminated plate-shaped bodies of the wound iron core body 1 in a case where a gap G extending in the radial direction is provided in the wound iron core body 1 having the cores b and 1c.
Extends in the radial direction of the wound core body 1 at a plurality of circumferential locations on the wound core body 1 on both annular flat surfaces 1b and 1c of the wound core body 1 and continuously extends from the inner peripheral portion to the outer peripheral portion of the wound core body. Continuous welded portions 3cs, 3ds having an end face machined to be flush with the end face of the plate-shaped body of the wound core body 1 facing the gap G while welding between the laminated plate-shaped bodies of the wound core body 1 To the annular flat surface 1 of the wound core body 1.
Since both ends of the end surface of the wound core body 1 forming the gap G between b and 1c extend in the radial direction of the wound core body 1 and are continuously provided from the inner peripheral portion to the outer peripheral portion of the wound core body 1. In addition, it is possible to obtain a gap-filled core that accurately prevents peeling between the laminations of the plate-like bodies constituting the gap-filled core by welding.

According to the first embodiment of the present invention, the peripheral surface 1a is formed of a plate-like body wound and laminated in a tubular shape.
In forming a radially extending gap G in the wound core body 1 having a pair of annular flat surfaces 1b and 1c formed at both ends in the axial direction by machining,
The wound core body 1 is disposed between the laminated plate-shaped bodies of the wound core body 1.
The welded portion 3 is welded at a plurality of circumferential positions on each of the annular flat surfaces 1b and 1c and extends in the radial direction of the wound core body 1 and continues from the inner peripheral portion to the outer peripheral portion of the wound core body 1.
Steps S2 and S3 of forming the cores a and 3b, and welding between the laminated plate-shaped bodies of the core body 1 at a gap G forming portion and extending in the radial direction of the core body 1 to extend the core. The welded portion 3c, which extends from the inner peripheral portion to the outer peripheral portion of the main body 1 and has a width larger than the width of the gap G,
3d forming step S3 and S4, and after steps S2 and S3 and steps S4 and S5 are completed, the welded portion 3 formed in steps S4 and S5 is formed.
Since c and 3d are processed to form the gap G in steps S6 and S7, the gap G can be appropriately processed by accurately preventing separation between the laminations of the plate-like members constituting the gap-filled core. A gap machining method for a wound core with a gap can be obtained.

Embodiment 2 In the above-described first embodiment, the welding process including steps S2 to S5 and the processing process including steps S6 and S7 are described as division processes. However, in the second embodiment, the welding device 2 (FIG. 1) is used. By employing the laser welding machine shown in the first embodiment as described above, or by employing an arc welding machine as another appropriate one, a welding process including steps S2 to S5 and a processing process including steps S6 and S7. Can be continuously automated.

In the second embodiment, the welding process consisting of steps S2 to S5 and the machining process consisting of steps S6 and S7 described in the first embodiment are automatically performed continuously. After the preparation step consisting of step S1, in the welding step consisting of steps S2 to S5, the welding parts 3a, 3b and the welding parts 3c, 3d are formed by the welding device 2 (FIG. 1) consisting of a laser welding machine or an arc welding machine. You. A sequence control device (not shown) for detecting the end of the operation of the laser welding machine or the arc welding machine in response to the end of the welding process consisting of steps S2 to S5 for forming the welds 3a, 3b and the welds 3c, 3d. ) Automatically starts a processing device 4 (FIG. 4) such as a grindstone, a laser processing machine, or a water jet processing machine, and automatically performs a processing process including steps S6 and S7 for cutting a gap G forming portion. And a gap G is formed. In this way, automation can be achieved only by performing laser welding or arc welding in particular.

According to the second embodiment of the present invention, a pair of annular flat surfaces 1 formed of a plate-like body wound and laminated in a cylindrical shape and formed at both ends in the axial direction thereof are formed.
In forming the radially extending gap G in the wound core body 1 having the cores 1b and 1c by machining, the gap between the laminated plate-shaped bodies of the wound core body 1 is defined by each annular plane of the wound core body 1. Welded portions 3a, 3b which are welded at a plurality of circumferential positions in 1b, 1c and extend in the radial direction of the wound core body 1 and continue from the inner peripheral portion to the outer peripheral portion of the wound core body 1
And a first welding step consisting of steps S2 and S3, and welding between the laminated plate-shaped bodies of the wound core body 1 at the gap G forming portion to extend in the radial direction of the wound core body 1 and wind. The welded portion 3c, which extends from the inner peripheral portion to the outer peripheral portion of the iron core body 1 and has a width larger than the width of the gap G,
And a second welding process consisting of steps S4 and S5 for forming 3d.
In response to the end of the first and second welding steps consisting of steps S4 and S5, the welded portion 3 formed in steps S4 and S5
Since the processing steps for forming the gap G in steps S6 and S7 by processing c and 3d are automatically started, separation between the laminations of the plate-like bodies constituting the gap-filled core is accurately prevented. The gap G can be appropriately machined, and a gap machining method of a wound iron core with a gap that can realize continuous automatic operation can be obtained.

As described above, according to the embodiment of the present invention, since the side portions of the wound core are continuously welded at a plurality of positions before the gap processing, the separation between the laminations occurs during the gap processing and after the processing. No peeling between the laminations of the gap portion occurs during and after processing. Therefore, no adhesive is required. By using a laser welding machine or an arc welding machine for welding, the wound iron core can be fixed and continuous automatic operation can be performed.

[0056]

According to the first aspect of the present invention, a wound core made of a plate-like body wound and laminated in a cylindrical shape and having a peripheral surface and a pair of annular flat surfaces formed at both ends in the axial direction thereof. In the main body, provided with a gap extending in the radial direction, between the stacked plate-shaped bodies of the wound core body are welded to each other, and flush with the end face of the plate-shaped body of the wound core body facing the gap. Since the welded portion having the end face is provided, it is possible to obtain a gap-filled core that accurately prevents peeling between the laminations of the plate-like bodies constituting the gap-filled core by welding.

According to the second aspect of the present invention, the welded portion having the end face is provided on the annular plane of the wound core body forming the gap on the same plane as the end face of the plate-shaped body of the wound core body facing the gap. By using the welded portion provided at the gap forming portion in the annular plane of the wound core body, it is possible to obtain a gaped core that accurately prevents separation between the laminations of the plate-like bodies constituting the gapped core.

According to the third aspect of the present invention, the welded portion having the end face on the same plane as the end face of the plate-shaped body of the wound core body facing the gap is provided on both annular planes of the wound core body forming the gap. Therefore, the gap-formed core that accurately prevents separation between the laminations of the plate-like bodies that constitute the gap-filled core can be obtained by the welded portions provided at the gap forming portions in both annular planes of the core.

According to the fourth aspect of the present invention, there is provided a wound iron core body formed of a plate-like body wound and laminated in a cylindrical shape and having a peripheral surface and a pair of annular flat surfaces formed at both ends in the axial direction. In the case where a gap extending in the radial direction is provided, the stacked plate bodies of the wound core body are welded to each other, and are machined into the same plane as the plate end face of the wound core body facing the gap. Since the welded portion having the bent end face is provided, the separation between the laminations of the plate-like bodies constituting the gap-filled core is accurately achieved by the welded portion provided by appropriate processing in the gap forming portion on both annular planes of the wound core body. To obtain a wound iron core with a gap.

According to the fifth aspect of the present invention, the welded portion having the end surface coplanar with the end surface of the plate-shaped body of the wound core body facing the gap is formed on the end edge of the end surface of the wound core body forming the gap. Because of the provision, the gap-formed core that accurately prevents separation between the laminations of the plate-like bodies that constitute the gap-formed core is obtained by the welded portion provided at the edge of the end surface of the core body that forms the gap. be able to.

According to the sixth aspect of the present invention, the welded portion having the end surface coplanar with the end surface of the plate-shaped body of the wound core body facing the gap is formed on both end edges of the end surface of the wound core body forming the gap. Because of the provision, the welded portions provided at both end edges of the end surface of the core body forming the gap provide a gap-filled core that appropriately prevents separation between the laminations of the plate-like bodies constituting the gap-filled core. be able to.

According to the seventh aspect, since the welded portion having the end face flush with the end face of the plate-shaped body of the wound core body facing the gap is provided so as to extend in the radial direction of the wound core body, By the welded portion extending in the radial direction of the wound core body and also subjected to an instantaneous power failure, it is possible to obtain a gaped core that accurately prevents peeling between the laminations of the plate-like members constituting the gaped core.

According to the eighth aspect, the welded portion having the end face flush with the end face of the plate-shaped body of the wound core body facing the gap is provided continuously from the inner peripheral portion to the outer peripheral portion of the wound core body. Therefore, the welded portion continuously provided from the inner peripheral portion to the outer peripheral portion of the wound core main body can obtain a gapped core that appropriately prevents separation between the laminations of the plate-like bodies constituting the gapped core. it can.

According to the ninth aspect of the present invention, there is provided a wound core body comprising a plate-like body wound and laminated in a cylindrical shape and having a circumferential surface and a pair of annular flat surfaces formed at both ends in the axial direction. A gap extending in the radial direction is provided, and welded portions for welding between the laminated plate bodies of the wound core body are provided at a plurality of circumferential locations in the wound core body, and Since the laminated plate-shaped bodies of the core body are welded to each other and a welded portion having the end face is provided on the same plane as the end face of the plate-shaped body of the wound core body facing the gap, a plurality of circumferential portions in the wound core body are provided. A gap that accurately prevents separation between the laminations of the plate-like bodies constituting the gap-filled core by means of a welded part and a welded part having the end face flush with the plate-like body end face of the wound core body facing the gap. The core Rukoto can.

According to the tenth aspect, since the welded portions provided at a plurality of positions in the circumferential direction of the wound core body are provided on the annular plane of the wound core body, the welded portions are provided at a plurality of locations on the annular plane of the wound core body. The welded portion makes it possible to obtain a wound core with a gap that accurately prevents peeling between the laminations of the plate-like bodies constituting the wound core with a gap.

According to the eleventh aspect, the welded portions provided at a plurality of circumferential positions on the wound core body are provided on both annular planes of the wound core body. By using the welded portion described above, it is possible to obtain a gap-filled core that accurately prevents peeling between the laminations of the plate-like bodies constituting the gap-filled core.

According to the twelfth aspect, since the welded portions provided at a plurality of positions in the circumferential direction of the wound core body extend in the radial direction of the wound core body, the welded portions are provided in the circumferential direction of the wound core body. A welded core extending in the radial direction of the wound core main body at a plurality of places can provide a wound core with a gap that accurately prevents peeling between the laminations of the plate-like bodies that form the wound core with a gap.

According to the thirteenth aspect, the welded portions provided at a plurality of positions in the circumferential direction of the wound core body are provided continuously from the inner peripheral portion to the outer peripheral portion of the wound core body. A welded portion provided continuously from the inner peripheral portion to the outer peripheral portion of the wound core body at a plurality of locations in the circumferential direction allows the gaped core to accurately prevent peeling between the laminations of the plate bodies constituting the gapped core. Obtainable.

According to the fourteenth aspect, when a gap extending in the radial direction is formed in a wound core body made of a plate-like body wound and laminated in a cylindrical shape by machining, the gap is machined. Prior to the welding, the plate-shaped bodies of the wound core body in the gap forming portion are welded to each other, so that separation between the stacked plate-shaped bodies constituting the gap-filled core is accurately prevented by welding. Thus, it is possible to obtain a gap machining method of a wound core having a gap, which can appropriately machine a gap.

According to the fifteenth aspect, when a gap extending in the radial direction is formed in the wound core body made of a plate-like body wound and laminated in a cylindrical shape by machining, the gap is machined. Prior to this, a welded portion is provided for welding between the laminated plate-shaped members of the wound core body at the gap forming portion, and the plate-shaped member is prevented from being peeled off by the welded portion. And the gap is formed by processing the welded portion to thereby form the gap by the removing action of the process. Therefore, the plate-like body constituting the gap-filled iron core is formed by the welded portion provided in the gap forming portion prior to the processing of the gap. And a gap machining method for a wound iron core with a gap, which can appropriately prevent separation between layers and can appropriately machine a gap.

According to the sixteenth aspect, when a gap extending in the radial direction is formed in a wound core body made of a plate-like body wound and laminated in a cylindrical shape by machining, the gap is machined. Prior to providing a welded portion for welding between the laminated plate-shaped bodies of the wound iron core body in the gap forming portion, and processing by leaving a part of the welded portion after forming the welded portion, The gap is formed while preventing the separation between the laminations of the plate-like bodies, and the gap between the laminations of the plate-like body after the gap processing is prevented by the remaining portion of the welded portion. By processing the welded part provided with a part of the welded part after the formation of the welded part, separation between the laminations of the plate-like bodies constituting the coiled core with a gap is accurately prevented, and the gap is formed. It can be obtained earnestly gap processing method gapped wound cores can drill.

According to the seventeenth aspect, when a gap extending in the radial direction is formed in a wound core body made of a plate-like body wound and laminated in a cylindrical shape by machining, the gap is machined. Prior to the gap forming portion, the welded portion for welding between the laminated plate bodies of the wound core body has a width wider than the width of the gap extending in the radial direction of the wound core body. The gap is provided while extending in the radial direction of the wound core, and after forming the welded portion, processing the central portion of the width of the welded portion while leaving both side portions, thereby preventing separation between the laminations of the plate-like bodies. Is formed to prevent separation between the laminations of the plate-like body after the gap processing by the remaining portion of the welded portion, so that the separation between the laminations of the plate-like bodies constituting the gap-filled core is performed during the gap processing and after the processing. At It is possible to obtain gaps processing method gapped wound cores that can properly process the gap to prevent the probability.

According to the eighteenth aspect, the plate-shaped members are welded from the inner peripheral portion to the outer peripheral portion of the wound core body to form the welded portion, so that the inner periphery of the wound core body is formed. By welding from the portion to the outer peripheral portion, it is possible to obtain a gap machining method for a gap-filled core that can appropriately prevent separation between the laminations of the plate-like bodies constituting the gap-filled core and appropriately process the gap.

According to the nineteenth aspect, the plate-shaped members are welded from the inner peripheral portion to the outer peripheral portion of the wound core body at the edge of the end surface of the wound core body forming the gap, Since the welded portion is formed, by welding from the inner peripheral portion to the outer peripheral portion of the wound core body at the edge of the wound core body forming the gap, the gap between the laminations of the plate-like bodies constituting the gapped wound core is formed. It is possible to obtain a gap machining method for a wound iron core with a gap, which can appropriately prevent the peeling and properly machine the gap.

According to the twentieth aspect of the present invention, there is provided a wound iron core body formed of a plate-like body wound and laminated in a cylindrical shape and having a circumferential surface and a pair of annular flat surfaces formed at both ends in the axial direction. Forming a gap extending in the radial direction by processing, forming a weld by welding between the laminated plate-shaped bodies of the wound core body at a plurality of circumferential locations on the wound core body. Forming a welded portion by welding between the laminated plate-shaped bodies of the wound core body at the gap forming portion, forming welded portions at a plurality of circumferential locations on the wound core body; and After the step of forming a weld in the gap forming portion is completed, the weld formed by the step of forming a weld in the gap forming portion is processed to form a gear. Since the gap is formed, it is possible to obtain a gap machining method for a gap-filled core that can appropriately prevent separation between the laminations of the plate-like bodies constituting the gap-filled core and appropriately process the gap. .

According to the twenty-first aspect, the formation of the welds provided at a plurality of circumferential positions on the wound core body is performed on the annular plane of the wound core body.
By forming welds provided at a plurality of locations on the annular plane of the wound core body, a gap-wound winding capable of appropriately preventing separation between laminations of plate-like bodies constituting the gap-wound core and appropriately processing the gap. It is possible to obtain an iron core gap machining method.

According to the twenty-second aspect, the formation of the welds provided at a plurality of circumferential positions on the wound core body is performed on both annular planes of the wound core body. By forming welds provided at a plurality of locations on a plane, a gap machining method for a gap-filled core that can properly prevent separation between laminations of plate-like bodies constituting a gap-filled core and appropriately process a gap. Can be obtained.

According to the twenty-third aspect, the formation of the welds provided at a plurality of circumferential positions on the wound core body is performed in the radial direction of the wound core body, and the welded portions are formed in the radial direction of the wound core body. In order to form a gap core wound core, it is possible to appropriately prevent separation between the laminations of the plate-like bodies constituting the gap core and appropriately process the gap. Can be.

According to the twenty-fourth aspect, the welded portion is formed by continuously welding from the inner peripheral portion to the outer peripheral portion of the wound core body at a plurality of positions in the circumferential direction of the wound core body. It is possible to obtain a gap machining method for a gap-embedded core that can appropriately prevent separation between the laminations of the plate-like bodies constituting the cored core and appropriately process the gap.

According to the twenty-fifth aspect, the welding between the plate members is performed by laser welding. Therefore, the welding between the plate members by laser welding is performed to form the plate having the wound iron core with a gap. It is possible to obtain a gap machining method for a wound iron core with a gap, which can appropriately prevent separation between the laminations of the shaped bodies and appropriately machine the gap.

According to the twenty-sixth aspect, the welding between the plate members is performed by arc welding. Therefore, the welding between the plate members by arc welding is performed to form the plate forming the wound core with a gap. It is possible to obtain a gap machining method for a wound iron core with a gap, which can appropriately prevent separation between the laminations of the shaped bodies and appropriately machine the gap.

According to the twenty-seventh aspect, a welding step of welding between the laminated plate bodies of the wound core body in the gap forming portion, and a processing of forming a gap by processing a welded portion in the welding step. And the processing step is automatically started in response to the end of the welding step, so that separation between the laminations of the plate-like bodies constituting the gap-filled core is properly prevented and the gap is appropriately adjusted. And a gap machining method for a gap-wound core that can realize continuous automatic operation by a welding device and a machining device.

In the gap machining method according to the twenty-eighth aspect of the present invention, there is provided a winding method comprising a plate-like body wound and laminated in a cylindrical shape and having a circumferential surface and a pair of annular flat surfaces formed at both ends in the axial direction. In forming a gap extending in the radial direction on the core body by processing, the gap between the laminated plate bodies of the wound core body is welded and wound at a plurality of circumferential locations on each annular plane of the wound core body. A first welding step of forming a continuous welded portion extending from the inner peripheral portion to the outer peripheral portion of the wound core body so as to extend in the radial direction of the core body, and forming a gap between the laminated plate bodies of the wound core body; A second welding step of forming a weld having a width wider than the gap, which is welded at the portion and extends in the radial direction of the wound core body and continues from the inner peripheral portion to the outer peripheral portion of the wound core body. And wherein the first and Upon completion of the second welding step,
Since the machining step of forming a gap by cutting the welded portion formed by the second welding step is automatically started, the separation between the laminations of the plate-like bodies constituting the gap-filled core is accurately determined. In addition, it is possible to obtain a gap machining method of a wound iron core with a gap, which can appropriately process a gap and can perform continuous automatic operation by a welding device and a machining device.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a welding process of a wound core body in an embodiment according to the present invention.

FIG. 2 is a perspective view showing an appearance of a wound iron core main body with a welded portion in an embodiment according to the present invention.

FIG. 3 is a perspective view showing a working process of forming a gap using a working device such as a grindstone in a wound iron core body having a continuous welded portion wider than a side surface gap width according to an embodiment of the present invention.

FIG. 4 is a perspective view showing an outer appearance of a wound core after gap processing in the embodiment according to the present invention.

FIG. 5 is a perspective view showing the appearance of a wound core body provided with a fixing means using an adhesive in a conventional technique.

FIG. 6 is a perspective view illustrating a process of forming a gap in a conventional wound iron core using a processing device such as a grindstone.

FIG. 7 is a perspective view showing the appearance of a wound core after gap processing in a conventional technique.

[Explanation of symbols]

1 winding core body, 2 welding equipment such as laser welding machine, 3
a, 3b A plurality of continuous welding portions provided on the side surface portion of the wound core body 1, 3c, 3d A continuous welding portion wider than the gap width provided on the side surface portion of the wound core body 1, and a processing device for a whetstone or the like.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tomoyuki Terakawa 1-157 Miyashita, Sagamihara-shi, Kanagawa F-term (reference) 5E062 AB01 AB13

Claims (28)

[Claims] 1. A radially extending wound core body formed of a plate-like body wound and laminated in a cylindrical shape and having a circumferential surface and a pair of annular flat surfaces formed at both ends in the axial direction. In the one provided with the existing gap, the stacked plate bodies of the wound core body are welded to each other, and a welded portion having the end face is provided on the same plane as the end face of the plate body of the wound core body facing the gap. A core with a gap. 2. A welded portion having an end face on the same plane as an end face of the plate-shaped body of the wound core body facing the gap is provided on an annular plane of the wound core body forming the gap. 2. The wound iron core with a gap according to 1. 3. A welded portion having an end face on the same plane as an end face of the plate-shaped body of the wound core body facing the gap is provided on both annular planes of the wound core body forming the gap. Item 3. A wound iron core with a gap according to Item 1. 4. A wound core body formed of a plate-like body wound and laminated in a cylindrical shape and having a circumferential surface and a pair of annular flat surfaces formed at both ends in the axial direction thereof is extended in the radial direction thereof. A welded portion having an end face machined to be flush with the end face of the plate-shaped body of the wound core body facing the gap in a state where the gap is provided, wherein the stacked plate-shaped bodies of the wound core body are welded to each other. The gap wound core according to claim 1, wherein the core is provided with a gap. 5. A welded portion having an end face flush with an end face of the plate-shaped body of the wound core body facing the gap is provided at an edge of the end face of the wound core body forming the gap. The wound iron core with a gap according to any one of claims 1 to 4. 6. A welded portion having an end face flush with an end face of the plate-shaped body of the wound core body facing the gap is provided at both end edges of the end face of the wound core body forming the gap. The wound core with a gap according to any one of claims 1 to 5. 7. A welded portion having an end face flush with an end face of the plate-shaped body of the wound core body facing the gap and extending in a radial direction of the wound core body. A wound iron core with a gap according to claim 6. 8. A welded part having an end face flush with an end face of the plate-shaped body of the wound core body facing the gap is provided continuously from an inner peripheral portion to an outer peripheral portion of the wound core body. A wound iron core with a gap according to any one of claims 1 to 7. 9. A radially extending wound core body formed of a plate-like body wound and laminated in a cylindrical shape and having a circumferential surface and a pair of annular flat surfaces formed at both ends in the axial direction. In the provision of the existing gap, the welded portions for welding between the laminated plate-shaped bodies of the wound core body are provided at a plurality of locations in the circumferential direction of the wound core body, and the wound core bodies are stacked. A coiled core having a gap, wherein the plate-shaped members are welded to each other, and a welded portion having the end surface is provided on the same plane as the plate-shaped member end surface facing the gap. 10. The core according to claim 9, wherein welds provided at a plurality of positions in the circumferential direction of the core are provided on an annular flat surface of the core. 11. The core according to claim 9, wherein welds provided at a plurality of positions in the circumferential direction of the core body are provided on both annular flat surfaces of the core body. 12. The winding core body according to claim 9, wherein welding portions provided at a plurality of positions in the circumferential direction of the winding core body extend in a radial direction of the winding core body. The wound iron core with a gap described in. 13. The winding core body according to claim 9, wherein the welding portions provided at a plurality of positions in the circumferential direction of the winding core body are continuously provided from an inner peripheral portion to an outer peripheral portion of the winding core body. The core with a gap according to any one of the above. 14. When forming a radially extending gap in a wound core body made of a plate-like body wound and laminated in a cylindrical shape by machining, the gap forming is performed prior to machining of the gap. A gap processing method, characterized in that the laminated plate-shaped bodies of the wound core body are welded to each other at a portion. 15. When forming a radially extending gap in a wound core body made of a plate-like body wound and laminated in a cylindrical shape by machining, the gap forming is performed prior to machining of the gap. A welded portion is provided for welding between the laminated plate-shaped bodies of the wound core body in the portion, and while this laminated portion prevents separation between the laminated plate-shaped bodies,
A gap machining method, wherein the gap is formed by machining the plate-like body and the welded portion to remove the gap by machining. 16. When forming a gap extending in the radial direction on a wound core body made of a plate-like body wound and laminated in a cylindrical shape by processing, the gap forming is performed prior to the processing of the gap. A welded portion is provided for welding between the plate-like bodies stacked on the wound core body in a portion, and a part of the welded portion is processed after the formation of the welded portion, thereby forming a gap between the plate-like bodies. A gap forming method, wherein a gap is formed while preventing peeling, and peeling between laminations of the plate-like body after the gap processing is prevented by a remaining portion of the welded portion. 17. When forming a gap extending in the radial direction on a wound core body made of a plate-like body wound and laminated in a cylindrical shape by processing, the gap forming is performed prior to the processing of the gap. In a portion, a welded portion for welding between the laminated plate bodies of the wound core body has a width wider than a width of a gap extending in a radial direction of the wound core body in a radial direction of the wound core. Extending and forming a gap while preventing the separation between the laminations of the plate-like bodies by processing the central portion of the width of the welded portion after forming the welded portion while leaving both side portions. A gap processing method comprising preventing separation between laminations of a plate-like body after the gap processing by a remaining portion. 18. The welded portion according to claim 14, wherein the plate-shaped members are welded from an inner peripheral portion to an outer peripheral portion of the wound core body to form the welded portion. Gap processing method. 19. The welded portion is formed by welding between the plate-shaped members at an end portion of the end surface of the wound core body forming the gap from an inner peripheral portion to an outer peripheral portion of the wound core body. The gap machining method according to any one of claims 14 to 17, wherein: 20. A wound core body formed of a plate-like body wound and laminated in a cylindrical shape and having a circumferential surface and a pair of annular flat surfaces formed at both ends in the axial direction, and extending in the radial direction thereof. Forming the existing gap by processing, forming a welded portion by welding between the laminated plate-shaped bodies of the wound core body at a plurality of locations in the circumferential direction of the wound core body; Welding between the laminated plate bodies at the gap forming portion to form a welded portion, and forming a weld at a plurality of circumferential locations on the wound core body and welding at the gap formed portion. Forming a gap by processing the welded portion formed by the step of forming a welded portion in the gap forming portion after the step of forming the portion is completed. 20. The gap machining method according to claim 14, wherein: 21. The gap machining method according to claim 20, wherein the formation of welds provided at a plurality of positions in the circumferential direction on the wound core body is performed on an annular plane of the wound core body. 22. The gap machining method according to claim 20, wherein the formation of welds provided at a plurality of circumferential positions on the wound core body is performed on both annular planes of the wound core body. 23. Forming welding portions provided at a plurality of circumferential positions on the wound core body in the radial direction of the wound core body, and forming the welded portions extending in the radial direction of the wound core body. 23. The gap machining method according to claim 20, wherein the gap machining is performed. 24. The welding part according to claim 20, wherein welding is continuously performed at a plurality of locations in the circumferential direction of the wound core body from an inner peripheral portion to an outer peripheral portion of the wound core body. The gap processing method according to any one of the above. 25. The gap machining method according to claim 14, wherein the welding between the plate-like bodies is performed by laser welding. 26. The gap machining method according to claim 14, wherein the welding between the plate-like bodies is performed by arc welding. 27. The method according to claim 27, further comprising: a welding step of welding between the laminated plate bodies of the wound core body in the gap forming portion; and a processing step of forming a gap by processing a welded portion in the welding step. The gap processing method according to any one of claims 14 to 24, wherein the processing step is automatically started in response to the end of the welding step. 28. A wound core body formed of a plate-like body wound and laminated in a cylindrical shape and having a peripheral surface and a pair of annular flat surfaces formed at both ends in the axial direction, and extending in the radial direction thereof. In forming the existing gap by machining, the gaps between the laminated plate-shaped bodies of the wound core body are welded at a plurality of circumferential locations on each annular plane of the wound core body and extend in the radial direction of the wound core body. A first welding step of forming a continuous welded portion from the inner peripheral portion to the outer peripheral portion of the wound core body, and welding between the laminated plate bodies of the wound core body at a gap forming portion to form a diameter of the wound core body. A second welding step of forming a weld portion extending in the direction and continuing from the inner peripheral portion to the outer peripheral portion of the wound core body and having a width wider than the width of the gap, wherein the first and second welding steps are performed. In response to the end of the welding process, 2. A gap machining method, wherein a machining process for forming a gap by cutting a welded portion formed by the welding process of 2 is automatically started.