JP2006288114A - Laminated core and manufacturing method of laminated core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated core of a higher space factor of core strips without forming a layer by an adhesive agent, in the laminated core in which the core strips are integrated through lamination using the adhesive agent, and to provide a manufacturing method to obtain the laminated core. <P>SOLUTION: Holes for applying the adhesive agent are provided at the core strips which constitute the laminated core, then using the adhesive agent applied to the holes for applying the adhesive agent, other core strips in which the holes for applying the adhesive agent are not formed are bonded and laminated. In other words, the holes for applying the adhesive agent are provided at the core strips, then the adhesive agent is applied to the holes for applying the adhesive agent, after that the strips are alternately laminated with the core strips where the holes for applying the adhesive agent are not provided, and the laminated core strips are integrated through lamination to manufacture the laminated core. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a laminated iron core and a method for producing a laminated iron core, and more particularly to a laminated iron core in which laminated iron core pieces are integrated using an adhesive, and a method for producing a laminated iron core.

  An iron core (laminated iron core) incorporated as a main member of a motor is manufactured by laminating and integrating iron core pieces in order to increase the output and efficiency of the motor.

  Lamination and integration of iron core pieces is not limited to a mechanical caulking method. For example, a plurality of iron core pieces coated with an adhesive on one side are laminated, pressed from above and below, and heated to integrate the iron core pieces. For example, a method of integrating the iron core pieces using an adhesive has also been proposed (see, for example, Patent Document 1).

In the method of integrating laminated iron core pieces using an adhesive, it is not necessary to form caulking points, so it is possible to create a small laminated iron core, which is said to contribute to miniaturization of the motor itself. Yes.
JP 7-170699 A

  However, when an adhesive is applied to one side of the core piece, a layer made of an adhesive is formed between the laminated core pieces, and the space factor of the core pieces in the laminated core decreases.

  The decrease in the space factor of the core piece weakens the core loss and electromagnetic characteristics of the laminated core, so it is possible to reduce the size of the laminated core by integrating the core piece with an adhesive, but the output characteristics and efficiency characteristics, etc. Was deteriorated.

  Such a problem has been prominent in thin core pieces such as an amorphous plate having a thickness of 0.030 mm or less and a thin electromagnetic steel plate having a thickness of less than 0.24 mm.

  Therefore, in the present invention, in a laminated core in which iron core pieces are laminated and integrated using an adhesive, a laminated core having a high space factor of the iron core pieces without forming a layer by the adhesive, and a laminated core that obtains this laminated core It aims at providing the manufacturing method of.

  In the present invention, in a laminated iron core in which a plurality of iron core pieces are laminated and integrated, one iron core piece having an adhesive application hole, located in the adhesive application hole, and adjacent to the one iron core piece in the lamination direction And an adhesive for bonding the other iron core piece.

  The other iron core piece does not have an adhesive application hole, and one iron core piece having the adhesive application hole is alternately laminated with the other iron core piece.

  Further, the adhesive is applied to the other iron core piece according to the position of the adhesive application hole of the one iron core piece adjacent in the laminating direction, and the one adjacent to the other iron core piece in the laminating direction. The other iron core piece and the one iron core piece are bonded to each other.

  In addition, it is preferable that the said one or other iron core piece consists of an amorphous plate or a thin electromagnetic steel plate.

  Next, in the present invention, in the method of manufacturing a laminated core in which an iron core piece is punched from a metal plate, and the iron core pieces are laminated and bonded, an adhesive is applied to the adhesive application hole of one iron core piece having an adhesive application hole. The one iron core piece and the other iron core piece not having the adhesive application hole are alternately laminated and bonded with the adhesive.

  At this time, one iron core piece formed with the adhesive application hole and the other iron core piece not formed with the adhesive application hole are alternately formed, and the adhesive is applied to the adhesive application hole of the one iron core piece. Are preferably laminated and integrated.

  Further, in the present invention, in the method of manufacturing a laminated core in which an iron core piece is punched from a metal plate, and the iron core pieces are laminated and bonded together, the adhesive agent for one iron core piece adjacent in the laminating direction when the iron core pieces are laminated An adhesive is applied to the location of the other iron core piece corresponding to the position of the application hole, and the one iron core piece is laminated on the other iron core piece and bonded with the adhesive.

  In addition, it is preferable that the said one or other iron core piece consists of an amorphous board or a thin electromagnetic steel plate.

  In the present invention, since the adhesive that has entered the adhesive application hole of the iron core piece adheres adjacent iron core pieces without spreading between the laminated iron core pieces, the space factor of the iron core pieces is extremely high. A laminated core with excellent loss characteristics and electromagnetic characteristics is manufactured.

  In addition, when core pieces made of extremely thin materials such as amorphous plates and thin electromagnetic steel sheets are laminated and integrated using an adhesive, it is possible to obtain a small, high-power and high-efficiency laminated core. .

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a best mode for carrying out a laminated core and a method for producing a laminated core according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram showing the configuration of the laminated core in the present embodiment. As shown in FIG. 1 (a), the laminated iron core 10 is shown in FIG. 1 (c), with a core piece 11 having no holes provided with no adhesive application holes for containing an adhesive, as shown in FIG. 1 (b). As shown in FIG. 1 (d), the perforated iron core pieces 13 provided with the adhesive application holes 12 are laminated alternately and integrated with the adhesive 14 applied to the adhesive application holes 12. It has become.

  1D is a cross-sectional view taken along line AA in FIG. 1A, and the adhesive application holes 12 in FIG. 1A are arranged in a vertical line, but as shown in FIG. The positions of the application holes 12 may be shifted from each other.

  As described above, in the laminated core in this embodiment, since the adhesive is applied to the adhesive application hole, the core pieces are laminated and integrated by the adhesive without forming a layer of the adhesive between the core pieces. Has been.

  FIG. 2 is a plan view showing a process when manufacturing an iron core piece not provided with an adhesive application hole in this embodiment.

  First, after punching the pilot hole 21 from the band-shaped material 20 such as an amorphous material or an electromagnetic steel plate, the slot 22 is punched to form the pilot hole 21 and the slot 22 as shown in FIG.

  Next, the shaft hole 23 for passing the shaft from the belt-shaped material 20 to the laminated iron core is punched out, and after forming the shaft hole 23 as shown in FIG. 2B, the outer shape of the core piece is removed from the belt-shaped material. As shown in 2 (c), the holeless core piece 11 without the adhesive application hole is formed.

  FIG. 3 is a plan view showing a process when manufacturing an iron core piece provided with an adhesive application hole in this embodiment.

  First, after the pilot hole 21 is punched from the band-shaped material 20 made of an amorphous material or an electromagnetic steel plate, the slot 22 is punched to form the pilot hole 21 and the slot 22 as shown in FIG.

  Next, the shaft hole 23 for passing the shaft from the strip-shaped material 20 to the laminated iron core is punched out to form the shaft hole 23 as shown in FIG. 3B, and then the adhesive application hole 12 for applying the adhesive. And an adhesive application hole 12 is formed as shown in FIG.

  Then, as shown in FIG. 3 (d), the adhesive 14 is applied to the adhesive application hole 12, and the outer shape of the iron core piece is removed from the strip, and the adhesive application hole is provided as shown in FIG. 3 (e). The perforated iron core piece 13 is formed.

  The perforated iron core pieces 13 provided with the adhesive application holes and the non-hole iron core pieces 11 provided with no adhesive application holes are alternately extracted and stacked.

  The adhesive may be any adhesive as long as it is an adhesive that does not melt again when a laminated core such as a thermosetting adhesive is incorporated in a motor, and can bond the core pieces together. An agent can be used.

  FIG. 4 is a cross-sectional view showing steps in manufacturing a laminated iron core by laminating and integrating iron pieces in the present embodiment.

  First, the perforated iron core pieces 13 provided with the adhesive application holes 12 and the iron core pieces 11 without holes are alternately cut out as described above, and the adhesive application holes are formed as shown in FIG. The holeless iron core pieces 11 that are not provided are stacked so as to be positioned on the uppermost surface and the lowermost surface.

  Next, the laminated core pieces are conveyed from a press device (not shown) to the pressurizer 30 shown in FIG. 4B, and the pressurizer 30 pressurizes the laminated core pieces from above and below to each core piece. 4 (c), the core pieces stacked at a temperature suitable for bonding the core pieces are heated by a heater 31 such as a heating wire based on conditions such as the type of adhesive and the material of the core pieces. As shown in FIG. 1, the laminated core 10 is manufactured by laminating and integrating the core pieces.

  In this example, the perforated iron core piece 13 provided with the adhesive application hole and the non-hole iron core piece 11 provided with no adhesive application hole are alternately extracted and stacked, A perforated iron core piece that has been pre-extracted and coated with an adhesive and a non-perforated iron core piece that has been pre-extracted may be prepared, and perforated iron core pieces and non-perforated iron core pieces may be alternately stacked. .

  As described above, in this embodiment, the adhesive coating hole 12 is provided in one iron core piece 13, and the adhesive is bonded to the adhesive coating hole 12 by applying the adhesive to the adhesive coating hole 12. The upper and lower iron core pieces 11 are bonded without spreading from the agent application hole, and the space factor of the iron core pieces can be greatly improved, and a laminated iron core having excellent iron loss characteristics and electromagnetic characteristics can be manufactured.

  Also, when a large number of thin core pieces are laminated, the spread of the adhesive does not occur in the same way, so the space factor of the core pieces is greatly improved, and the excellent electromagnetic characteristics of the core piece material are utilized. A laminated core can be manufactured.

  By the way, in this embodiment, the adhesive is applied in the adhesive application hole, but the adhesive is applied on the lower iron core piece according to the position of the adhesive application hole provided in the iron core piece laminated on the upper side. This will be described in detail below with reference to Example 2.

  FIG. 5 is a cross-sectional view showing the configuration of the laminated core in the present embodiment. As shown in the figure, in the laminated core 10 in this embodiment, a perforated core piece 13 provided with an adhesive application hole 12 is laminated on a holeless core piece 11 provided with no adhesive application hole, They are integrated by the adhesive 14 applied according to the position of the adhesive application hole 12.

  In addition, in the laminated iron core in the present embodiment, the positions of the adhesive application holes 12 are shifted from each other in the adjacent core pieces 13 so that the positions of the adhesive application holes 12 of the open core pieces 13 that are in contact with each other do not coincide with each other. Has been.

  As described above, the laminated iron core in the present embodiment is coated with the adhesive depending on the position of the adhesive application hole, so that a layer made of the adhesive is not formed between the iron core pieces. Since the adhesive is applied to the iron core pieces, the core pieces are laminated and integrated with the adhesive with high adhesive strength.

  Further, since the positions of the adhesive application holes are shifted between adjacent perforated iron core pieces, the positions of the adhesive application holes are shifted in the stacking direction, and the influence of the adhesive on the magnetic flux flow can be suppressed.

  FIG. 6 is a plan view showing a process when manufacturing an iron core piece not provided with an adhesive application hole in the present embodiment.

  First, after punching the pilot hole 21 from the band-shaped material 20 such as an amorphous material or an electromagnetic steel plate, the slot 22 is punched to form the pilot hole 21 and the slot 22 as shown in FIG.

  Next, a shaft hole 23 for passing the shaft from the belt-shaped material 20 to the laminated iron core is punched to form the shaft hole 23 as shown in FIG. 6 (b), and then laminated upward as shown in FIG. 6 (c). The adhesive 14 is applied to a location corresponding to the position of the adhesive application hole of the perforated iron core piece.

  Then, the outer shape of the iron core piece is removed from the belt-like material to form a holeless iron core piece 11 in which no adhesive application hole is provided as shown in FIG.

  The adhesive may be any adhesive as long as it is an adhesive that does not melt again when a laminated core such as a thermosetting adhesive is incorporated in a motor, and can bond the core pieces together. An agent can be used.

  FIG. 7 is a plan view showing a process when manufacturing an iron core piece provided with an adhesive application hole in this embodiment.

  First, after the pilot hole 21 is punched from the band-shaped material 20 such as an amorphous material or an electromagnetic steel plate, the slot 22 is punched to form the pilot hole 21 and the slot 22 as shown in FIG.

  Next, a shaft hole 23 for passing the shaft from the belt-shaped material 20 to the laminated iron core is punched, and after forming the shaft hole 23 as shown in FIG. 7B, the adhesive application hole 12 is punched, and FIG. The adhesive application hole 12 is formed as shown in FIG.

  And as shown in FIG.7 (d), the adhesive agent 14 is apply | coated to the location corresponding to the position of the adhesive application hole of the perforated core piece laminated | stacked upwards, the core piece is extracted from the strip | belt-shaped material, As shown in FIG. 7 (e), a perforated iron core piece 13 provided with an adhesive application hole is formed.

  FIG. 8 is a cross-sectional view showing steps in manufacturing a laminated core by laminating and integrating the core pieces in the present embodiment.

  First, as shown in FIG. 8 (a), a perforated core piece coated with an adhesive 14 is laminated on a core piece without a hole at a position corresponding to the adhesive application hole 12 of the perforated core piece 13 laminated above. To do.

  Here, even in the iron core piece having no hole in the lowermost layer, the adhesive is applied at a position corresponding to the adhesive application hole of the iron core piece having a hole in the upper layer, and in the iron core piece in the uppermost layer, Since there are no perforated core pieces laminated on top, no adhesive is applied.

  Next, as shown in FIG. 8 (b), the core pieces laminated by the pressurizer 30 are pressed from above and below to bring the core pieces into close contact, and based on conditions such as the type of adhesive and the material of the core pieces. Then, the laminated iron core 10 is manufactured by heating to a temperature suitable for the adhesion of the iron core pieces with a heater 31 such as a heating wire and stacking and integrating the iron core pieces as shown in FIG.

  In this embodiment, the adhesive is applied to the lower iron core piece according to the position of the adhesive application hole of the upper iron core piece laminated on the upper side, but the lower iron core located on the lower side when laminated. The adhesive may be applied to the upper iron piece depending on the position of the adhesive application hole of the piece.

  As described above, in this embodiment, the adhesive is applied to the location of the iron core piece corresponding to the position of the adhesive application hole of the perforated iron core piece laminated on the upper side, and the adhesive applied to the lower iron core piece is laminated on the upper side. The core pieces are laminated and bonded so as to correspond to the adhesive application holes of the perforated core pieces.

  For this reason, the upper and lower iron core pieces are bonded without the adhesive spreading out from the adhesive application hole, the space factor of the iron core pieces is greatly improved, and the iron loss characteristics and electromagnetic characteristics are excellent. Since the adhesive is applied every time and the iron core pieces adhere to each other, a laminated iron core having excellent adhesive strength can be manufactured.

  In addition, when a large number of thin core pieces are laminated, the spread of the adhesive is not the same, so the space factor of the core piece is greatly improved, and the excellent electromagnetic characteristics of the core piece material are utilized. A laminated iron core having excellent adhesive strength can be produced.

  In Example 2, the adhesive is applied to the lower iron core piece according to the position of the adhesive application hole of the laminated iron core piece to be laminated. An adhesive may be applied to the adhesive application hole and laminated.

Sectional drawing which shows the structure of the laminated iron core in Example 1 The top view which shows the process at the time of manufacturing the iron core piece without a hole in Example 1. The top view which shows the process at the time of manufacturing the apertured iron core piece in Example 1 Sectional drawing which shows the process at the time of manufacturing the laminated iron core by laminating | stacking and integrating the iron core piece in Example 2. FIG. Sectional drawing which shows the structure of the laminated iron core in Example 2. The top view which shows the process at the time of manufacturing the iron core piece without a hole in Example 2. The top view which shows the process at the time of manufacturing the apertured iron core piece in Example 2 Sectional drawing which shows the process at the time of manufacturing the laminated iron core by laminating | stacking and integrating the iron core piece in Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Laminated iron core 11 ... Non-hole iron core piece 12 ... Adhesive application hole 13 ... Perforated iron core piece 14 ... Adhesive 20 ... Band-shaped material 21 ... Pilot hole 22 ... Slot 23 ... Shaft hole 30 ... Pressurizer 31 ... Heater

Claims (7)

In a laminated iron core in which multiple iron core pieces are laminated and integrated,
One core piece having an adhesive application hole;
A laminated core comprising: an adhesive that is positioned in the adhesive application hole and that bonds the one iron core piece and the other iron core piece adjacent in the laminating direction. The other iron core piece does not have an adhesive application hole,
The laminated iron core according to claim 1, wherein one iron core piece having the adhesive application hole is alternately laminated with the other iron core piece. The adhesive is
Applied to the other core piece according to the position of the adhesive application hole of the one core piece adjacent in the stacking direction,
2. The other iron core piece enters the adhesive application hole of the one iron core piece adjacent in the stacking direction from the other iron core piece, and bonds the other iron core piece and the one iron core piece. The laminated core described.   4. The laminated core according to claim 1, wherein the core piece is made of an amorphous plate or a thin electromagnetic steel plate. In a manufacturing method of a laminated core in which an iron core piece is punched from a metal plate, and the iron core pieces are laminated and bonded,
Applying an adhesive to the adhesive application hole of one iron core piece having an adhesive application hole,
A method of manufacturing a laminated core, wherein the one iron core piece and the other iron core piece having no adhesive application hole are alternately laminated and bonded with the adhesive. In a manufacturing method of a laminated core in which an iron core piece is punched from a metal plate, and the iron core pieces are laminated and bonded,
When the iron core pieces are laminated, an adhesive is applied to the position of the other iron core piece corresponding to the position of the adhesive application hole of the iron core piece adjacent to the lamination direction,
A method of manufacturing a laminated core, wherein the one iron core piece is laminated on the other iron core piece and bonded with the adhesive.   The method of manufacturing a laminated core according to claim 5 or 6, wherein the core piece is made of an amorphous plate or a thin electromagnetic steel plate.

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