JPH01298923A - Manufacture of magnetic anisotropic conductive material - Google Patents

Abstract

PURPOSE:To improve adhesive properties of a magnetic material to a conductive material by alternately laminating the magnetic material molded in a pectinated circular state and covered with the same type of material as the conductive material and the conductive material having the same inner and outer diameters as those of the magnetic material and molded in a circular state, and press- bonding them. CONSTITUTION:A magnetic material 1 to become a skeleton of a magnetic anisotropic conductive material press-molded or molded by etching in a pectinated circular state from the stripe of a magnetic material has slits 1a, and is placed with the same material as that of the conductive material. The conductive material 2 is molded in a circular state having the same inner and outer diameters as those of the material 1. A laminate 10 is composed while holding the material 1 between the materials 2. Thus, the adhesive properties of the magnetic and conductive materials can be improved, and the space factor of the magnetic and conductive materials can be set arbitrarily.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a magnetically anisotropic conductive material, and in particular,
The space ratio of magnetic material and conductive material can be set arbitrarily,
The present invention also relates to a method for manufacturing a magnetically anisotropic conductive material, which improves the bonding properties between a conductive material and a magnetic material, simplifies workability and processes, and makes it possible to manufacture a stable magnetically anisotropic conductive material at a low cost.

[Conventional technology]

As a conventional method for manufacturing magnetically anisotropic conductive materials, for example,
There is a casting method in which magnetic materials formed into comb-shaped discs are laminated and the gaps between them are filled with molten conductive material, and copper-coated steel wire is processed into rectangular tapered pins and the pins are layered radially in several layers. Copper-covered steel wire heating and pressing bonding method, in which CF C (Cu-Fe-Cu) 3 is stacked and then crimped by heating and pressing
Radial slits are made on a disc of N-clad material, and the resulting comb-shaped clad materials are stacked so that the slits are aligned in the vertical direction.
There is a method of inserting and press-fitting strips by sandwiching the U-strips and applying heat and pressure to press them together.

[Problem to be solved by the invention]

However, the conventional methods for manufacturing magnetically anisotropic conductive materials each have the following drawbacks.

(1) Casting method Since the molten metal of the conductive material cannot fill all the gaps in the magnetic material, voids and blowholes may be formed, leading to insufficient bonding between the conductive material and the magnetic material.

(2) Copper-covered wire heating and pressure bonding method Copper-covered wire taper pins are formed, and the pins are arranged radially and stacked, so many processes are required, which is disadvantageous in terms of economy. occurs.

(3) Strip material insertion and press bonding method Since the Cu strips are sandwiched between the slits in the vertical rows of the stacked cladding materials, the magnetic material is arranged in a regular array in each vertical row, resulting in effective conductivity. Also, there is the disadvantage that magnetic permeability cannot be obtained.

Therefore, an object of the present invention is to provide a method for producing a magnetically anisotropic conductive material that improves the bonding properties between a magnetic material and a conductive material.

Another object of the present invention is to provide a method for manufacturing a magnetically anisotropic conductive material that reduces costs by simplifying operations and processes.

Still another object of the present invention is to provide a method for producing a magnetically anisotropic conductive material in which the space ratio between the magnetic material and the conductive material can be set arbitrarily.

[Means to solve the problem]

In order to achieve the above-mentioned objects, the present invention includes a magnetic material formed into a comb-shaped ring shape and coated with the same type of conductive material, and a conductive material formed into a ring shape having the same inner and outer diameters as the magnetic material. The present invention provides a method for producing a magnetically anisotropic conductive material, in which magnetically anisotropic conductive materials are alternately laminated and pressure-bonded.

That is, the method for producing a magnetically anisotropic conductive material of the present invention comprises a magnetic material formed into a comb-shaped ring shape by press molding or etching, and coated with the same type of conductive material; Alternately laminating a magnetic material and a conductive material formed into an annular shape having equal inner and outer diameters; and heating and pressing the laminated conductive material and the magnetic material to integrate the magnetic material with the conductive material. forming a hollow cylinder. The method may also include the step of tightly filling the gaps between the laminated materials, mainly the comb-shaped gaps between the magnetic materials, with a conductive material powder or a paste containing an organic polymer mixed with the powder. good.

As described above, in the present invention, since the magnetic material and the conductive material are molded by press molding or etching, the space ratio of the magnetic material can be set arbitrarily. Further, by applying a coating of the same type as the conductive material (for example, copper plating) to the magnetic material, it is possible to improve the bonding properties between the magnetic material and the conductive material when pressurized.

The coating may be a cladding layer of cladding material.

In addition, the method for manufacturing the magnetically anisotropic conductive material manufactured by the present invention can be used for the rotor of an induction motor, for example,
It can be used as a damper of a synchronous motor, a secondary conductor of a linear induction motor, and an electromagnetic induction shielding material, and its applications are not particularly limited.

〔Example〕

Hereinafter, the method for manufacturing the magnetically anisotropic conductive material of the present invention will be explained in detail.

FIGS. 1(a) and 1b) show an embodiment of the present invention, in which 1 is a magnetic material forming the skeleton of a magnetically anisotropic conductive material formed into a comb-shaped ring shape by press molding or etching from a strip of magnetic material. , has a slit l-1a, and has a magnetic material 1
is plated with the same type of conductive material (for example, copper plating). 2 is a conductive material formed into an annular shape having the same inner and outer diameters as the magnetic material 1 by press molding or etching from a strip of conductive material, and the inner and outer diameters of each are D+ =
d+, D! =d2. The comb-shaped ring is (C), (
It may also have a shape like d).

FIG. 2 shows a state in which magnetic materials 1 and conductive materials 2 are alternately laminated, and the magnetic material 1 and the conductive material 2 obtained by the above-mentioned method are provided, and the magnetic material 1 is placed between the conductive materials 2. The laminate 10 is constructed by sandwiching the two.

The thus obtained laminate 10 may be heated and pressurized as it is, or a powder of a conductive material or a binder may be added to the powder of a conductive material in the gaps of the laminate 10, that is, the comb-shaped annular slits la of the magnetic material 1. After embedding a paste containing a molecular polymer (for example, resin), etc., heat and pressure are applied. This heating and pressing can be carried out, for example, by heating the laminate 10 with a heater or the like and pressing the laminate 10 with a stem or the like (high temperature compression method, for example HIP). At this time, since the magnetic material 1 is coated with the same type of plating as the conductive material 2 (for example, copper plating if the conductive material 2 is copper), the atomic diffusion pressure bonding force is increased, and the magnetic material 1 A strong bond can be obtained between the conductive material 2 and the conductive material 2.

Figure 3 shows heated and pressurized magnetic material 1 and conductive material 2.
, the gap between the magnetic material 1 is evenly filled with the conductive material 2, and the magnetic material 1 and the conductive material 2 have strong pressure bonding properties. This laminate is then machined on the surface and center (on the surface side) to produce a magnetically anisotropic conductive material.

The magnetically anisotropic conductive material produced in this way is
As shown in Figures Ta) and (b), it is suitable for use in rotors for induction motors, etc.

In FIGS. 4(a) and (b), 1 is a magnetic material, 2 is a conductive material, 3 is a rotating shaft, 4 is a current-carrying jacket, 5 is a rotor core,
6 is a magnetically anisotropic conductive material, and the magnetic permeability is μf >> μθ
Therefore, a predetermined conductivity ρX can be obtained. In addition, in FIG. 1(a), the protrusion 1b can be used as a retaining protrusion for fixing the position.

〔Effect of the invention〕

As explained above, according to the method for manufacturing a magnetically anisotropic conductive material of the present invention, a magnetic material formed into a comb-shaped ring shape and coated with the same type of conductive material, and a magnetic material having an inner and outer diameter that is Conductive materials formed into equal annular shapes are alternately laminated and crimped to improve bonding properties between the magnetic and conductive materials, and the space ratio between the magnetic and conductive materials can be set arbitrarily. simplifies work and processes by enabling
Cost reduction can be achieved.

[Brief explanation of the drawing]

FIG. 1(a) is an explanatory diagram showing an embodiment of the present invention;
Figure 1 (C), (dl is an explanatory diagram showing another shape of the magnetic material, Figure 2 is an explanatory diagram showing the laminated state of magnetic material and conductive material, and Figure 3 is a heated and pressurized laminate. FIGS. 4(a) and 4(b) are explanatory views showing a rotor for an induction motor having a magnetically anisotropic conductive material. -Magnetic material 2----
−−−−・−Conductive material 3−・・・・−11−−Rotating shaft
4−・〜−−−−−−−Electrifying outer sheath 5・−・・−
-1--Rotor core 6---1--Magnetic anisotropic conductive material 10--
・−・−・−Laminated body

Claims (2)

[Claims] (1) In a method for manufacturing a magnetically anisotropic conductive material having different magnetic permeability in a predetermined first direction and a magnetic permeability in a second direction different from the first direction, a comb-shaped annular shape is formed by press molding or etching. Alternately laminating a magnetic material molded into a magnetic material and coated with the same type of conductive material, and a conductive material molded into an annular shape having the same inner and outer diameters as the magnetic material by press molding or etching; A method for manufacturing a magnetically anisotropic conductive material, comprising the step of heating and pressing the laminated conductive material and the magnetic material to form a hollow cylindrical body in which the magnetic material is integrated with the conductive material. . (2) The step of configuring the hollow cylindrical body includes densely filling the gap between the laminated magnetic material and the conductive material with conductive material powder or a paste obtained by mixing the powder with an organic polymer and heating it. 2. The method of manufacturing a magnetically anisotropic conductive material according to claim 1, further comprising the step of pressing.