JPS59181604A - Manufacture of core - Google Patents

Abstract

PURPOSE:To fix a stacked amorphous magnetic alloy thin band easily and positively by winding or laminating the thin band, winding a winding fixing member such as a tape impregnated with an accelerator around the thin band and fast sticking the winding fixing member with a resin. CONSTITUTION:An amorphous magnetic alloy thin band 1 is stacked in a multilayer manner by winding it many times, thus molding a wound core 2. Winding fixing members 3 impregnated with an accelerator are each wound around the amorphous magnetic alloy thin band 1 stacked in the multilayer manner in several section of the wound core 2. The members 3 are dipped into the solution of the accelerator in order to impregnate the winding fixing members 3 with the accelerator. There are also methods through which the solution is sprayed against the members 3 by a sprayer. The winding fixing members 3 are wound on the wound core 2, the winding fixing members 3 are coated or impregnated with a resin, and the winding fixing members 3 are fast stuck with the applying or impregnating resin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing an iron core made of an amorphous magnetic alloy ribbon.

[Technical background of the invention and its problems]

Conventionally, wound cores and laminated cores provided in induction devices such as transformers are constructed using silicon steel strip as the core material.

By the way, recently metals (iron, cobalt, etc.) and half metals have been used as core materials! Beneficial elements (phosphorus, boronate, silicon, carbon, etc.)
An amorphous magnetic alloy ribbon manufactured by the melt quenching method has come to be used. This amorphous magnetic alloy ribbon has an iron frame and has excellent excitation characteristics with a very small excitation current.

However, since the amorphous magnetic alloy ribbon is produced by a rapid and cold process, it is very thin and has low rigidity, and if the iron core is manufactured using this material, it has the i1 quality of being both hard and brittle. A serious problem has arisen.

During the i-coupling in which the iron core was constructed using an amorphous magnetic alloy ribbon,
The illumination point will be explained using a wound iron core as an example.

When constructing a wound core using an amorphous magnetic alloy ribbon, it is difficult to cut (θ〒), the magnetic properties deteriorate when cut, and the shape of the core tends to collapse. Rather than using the C-cut structure or one-turn cut structure used in the In the case of an uncut type wound core using magnetic alloy ribbon,
Conventionally, in order to fix the thin strips 1 stacked in multiple layers by winding, a tape is wrapped around the stacked thin strips, and the tape is wrapped around the thin strips. A method of applying a resin or a method of impregnating the laminated surface of the ribbon with a resin is used. However, with either method, it is necessary to hold the core in order to prevent the core from deforming for a long time after the resin is applied or impregnated with the resin until the resin hardens, which reduces the work efficiency of the core fixing work. Furthermore, in order to sufficiently cure the resin to be coated or impregnated, it was necessary to reliably control the viscosity to obtain a viscosity that would allow for good curing.

Incidentally, a similar problem occurred when manufacturing a 4λ layer core using an amorphous magnetic alloy ribbon.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides a method for manufacturing an iron core that uses amorphous magnetic alloy ribbons, and that allows the overlapping ribbons to be easily and reliably fixed. It is something to do.

[1 Summary of the Invention] Iron core manufacturing method of the present invention (d1 Amorphous magnetic alloy ribbons are wound or laminated to form an iron core, and hardening is accelerated around the laminated ribbons in multiple layers of the iron core. This method is characterized by wrapping a winding fixing member such as a tape impregnated with an agent, and then applying or impregnating a resin to fix the winding fixing member with the resin, thereby curing the resin in a short time and sufficiently. It is something that can be done.

[Embodiments of the invention]

Hereinafter, an explanation will be given of an example in which the invention and invention are shown in the drawings.

An embodiment in which the method for manufacturing an iron core of the present invention is applied to an uncut wound iron core will be described with reference to FIG.

By winding the amorphous magnetic alloy ribbon 1 many times, the wound core 2 is formed by stacking the amorphous magnetic alloy ribbon 1 in multiple layers.

Next, a winding fixing member 3 impregnated with a hardening accelerator is wound around the amorphous magnetic alloy ribbon 1 in multiple layers in each part of the wound core 2.

The winding fixing member 3 is a tape-shaped member made of, for example, a glass tape, and as a curing accelerator impregnated into the winding fixing member 3, I B 2 MZ manufactured by Shikoku Kasei is used. In order to impregnate the wound fixing member 3 with a curing accelerator, the member 3 is immersed in a solution of the curing accelerator. There are methods such as spraying the solution onto the member 3. It is preferable that the winding fixing member 3 is distributed and wound around each part of the winding core 2,
For example, let us consider the case shown in FIG. Furthermore, after winding the winding fixing member 3 around the wound iron core 2, the winding fixing member 3 is coated or impregnated with resin, and the winding fixing member 3 is fixed in the coated or impregnated resin. For example, the grain size is determined by using a main agent (TVB-2703F manufactured by Toshiba Chemical), a curing agent (HN-2200 manufactured by Hitachi Chemical), and a curing accelerator (U manufactured by Nippon Yuka).
A mixed solution of CP, BDMA) is used. If the resin is not yet applied to the winding fixing member 3 and impregnated, methods such as spraying the resin or immersing the entire core in a resin bath are used. Incidentally, when impregnating the winding fixing member 3 with the resin, the resin is also impregnated between each layer of the amorphous <ft magnetic alloy ribbon of the wound core 2, if necessary. Then, the resin applied or impregnated onto the winding fixing member 3 is rapidly cured by the curing accelerator impregnated into the winding fixing member 3.

By curing the resin, the winding fixing member 3 is hardened in a state wound around the overlapping thin strip j of the iron core 1 and attached to the thin strip 1. Therefore, each winding fixing member 3 wound around each part of the winding iron core 2 is solidified with resin and fixed to the winding iron core 2, so that the amorphous magnetic alloy ribbon 1 is wound. The entire wound core 2 is fixed with sufficient rigidity.

According to such a method of manufacturing a wound core, the resin that has been applied to the wound fixing member 3 and yet to be peeled off is applied to the wound fixing member 3.
It is rapidly cured in a short period of time by a curing accelerator impregnated with. This resin curing time is 1/10 to 1/30 of the curing time when no curing accelerator is used. Therefore, the time required to hold the open wound core 2 so that its shape does not collapse after coating or impregnating the resin until the resin hardens is very short, and the work efficiency of fixing the wound iron core 2 is very good. Further, even if the viscosity of the resin is low, the resin can be sufficiently cured by the action of the curing accelerator, so there is no need to pay much attention to the viscosity control of the resin. Furthermore, it is possible to freely respond to the requirement of whether or not it is necessary to impregnate the laminated ribbon with resin by adjusting the resin viscosity and the length of time for soaking in the resin.

If you do not want resin to be impregnated between laminated ribbons, use 100
All you need to do is to immerse the wound core 2 in a resin bath of approximately 0 centistokes and immediately pull it up and drop the resin attached to the wound core 2 to remove it dripping, and the resin will infiltrate between the ribbon layers and the shrinkage stress due to resin hardening will be applied to the ribbon 1. There is no adverse effect on the excitation characteristics of the added iron core. Note that a winding fixing member 3 is attached to the surface of the winding core 2.
By winding the core at intervals, it is easier to handle the core before and after resin treatment, and the effect of shrinkage stress due to resin curing is smaller than when resin is applied to the entire surface of the core, which reduces the negative effect on the excitation characteristics of the core. can be reduced.

Another embodiment in which the present invention is applied to an uncut type wound core will be described with reference to FIG. Two sets of wound cores 2, 2 are formed by winding the amorphous magnetic alloy ribbon 1, a winding fixing member 3 impregnated with a hardening accelerator is wound on each of the wound cores 2, 2, and then The cores 2 and 2 are butted together and treated with resin at the same time. Since the two sets of wound cores 2 and 2 are treated with resin at the same time, the wound fixing members 3 that are in contact with each other are fixed and integrated with resin, and the two sets of wound cores 2. It can be done. This core interval 4 becomes a passage for a cooling medium in the device when it is incorporated into an induction device and operated, and has a great effect on cooling the wound core 2. Although FIG. 2 shows a model of a wound core, the same applies to a laminated core.

Furthermore, as shown in the core cross-sectional view in FIG. The member 3 may be wound and treated with resin. At this time, the spacer piece 5 may be a solid material or may be a fibrous material impregnated with or coated with a hardening accelerator similar to that of the winding fixing member 3.

Further, an embodiment of this manufacturing method, which is applicable to manufacturing a laminated core in which amorphous magnetic alloy ribbons 1 are laminated, will be described with reference to FIG. 4. Leg iron cores 6a, 6b, 6c
A large number of amorphous magnetic alloy ribbons 1 constituting the lower yoke cores 7a and 7b are alternately laminated to form these cores 6a to 6.
c, 7a, and 7b to form each core 6a to 6c.

A tape-shaped winding fixing member 3 made of, for example, glass tape impregnated with a curing accelerator is wound around 7a and 7b, and then resin is sprayed onto the winding fixing member 3 by spraying. The resin is rapidly cured in a short time by the hardening accelerator of the winding fixing member 3, and thereby the winding fixing member 3 is hardened and fixed to the iron core. Furthermore, the leg cores 6a to 6c are fitted with windings (not shown), and the leg cores 6a to 6c are combined with the upper yoke core (not shown), and the fixing member 3 is wound in the above-described manner.
Wrap it around and apply resin. Note that if the resin is not hardened on the yoke core, the winding fixing member 3 cannot be wound to any size.

Note that the winding fixing member is not limited to a tape-like member, and may be a wide sheet-like member.

〔Effect of the invention〕

As explained above, the method for manufacturing an iron core of the present invention efficiently uses a winding fixing member and a resin to form amorphous magnetic ribbons that are stacked in multiple layers by winding or laminating to form an iron core. It can be fixed securely with proper work.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of a wound core manufactured by the manufacturing method of the present invention, FIG. 2 is a perspective view showing another example of the wound core, and FIG. 3 is a perspective view showing another example of the wound core manufactured by the manufacturing method of the present invention. FIG. 4 is a cross-sectional view showing an embodiment of the present invention, and FIG. 4 is a perspective view showing an embodiment of a laminated iron core manufactured by the manufacturing method of the present invention. l...Amorphous magnetic alloy ribbon, 2...Wound iron core, 3...
Winding fixing member, 68-6c...ttli tA core, 7
a, 7 b...Yoke iron core. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] Amorphous magnetic alloy ribbons are wound or laminated to form an iron core in multiple layers, and a hardening accelerator-impregnated winding is formed around the overlapping amorphous magnetic alloy ribbons. A method for manufacturing an iron core, characterized in that the winding fixing member is wound around the core, and then a resin is applied or impregnated and cured to fix the winding fixing member to the iron core.