JPS63250021A - Manufacture of magnetically anisotropic conducting material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a magnetically anisotropic conductive material in which composite wires in which a magnetic filament is coated with a conductive material are arranged in parallel and are laminated and integrated. In particular, the present invention relates to a method of manufacturing a magnetically anisotropic conductive material in which the parallel directions of composite wires are alternately shifted by a predetermined angle in each layer.

[Conventional technology]

As a magnetically anisotropic conductive material, for example, JP-A-57-46
There is one shown in Publication No. 657.

Figure 8<4), (I+) shows the magnetically anisotropic conductive material, which is used in the rotor of an induction motor.

That is, a current-carrying jacket 2 and a rotor core 3 are provided coaxially with the rotating shaft 1, and the current-carrying jacket 2 has a magnetic material 4 extending in the radial direction and a magnetic material 4 filled in between, as shown in the enlarged part Q. The main part is composed of a magnetically anisotropic conductive material 6 made of a conductive material 5.

With the above configuration, a rotor can be obtained in which the magnetic permeability μm in the radial direction is larger than the magnetic permeability μe in the circumferential direction (μ, >μe) and the resistivity ρ8 in the axial direction is small. When this induction motor is driven, magnetic coupling with the stator with little magnetic fluctuation is obtained due to the large magnetic permeability μ with little variation in the radial direction, making it possible to drive with little vibration and noise. And because the winding was omitted from the rotor,
It is possible to achieve reduction in size and weight. Furthermore, magnetic permeability and resistivity can be controlled depending on the space ratio of the magnetic material and the conductive material.

As a method for producing this magnetically anisotropic conductive material, for example, the methods shown in FIGS. 9(A) and (U) and FIGS. 10(A) and (II) have been proposed. 9(a) and 9(ff) show a composite material 13 composed of a magnetic material 11 such as m-ray and a conductive material 12 such as copper or aluminum coated on its outer periphery. ), (D) is the composite material 1 that expands the composite material 13 according to the distance from the center point 0.
It is shown that a ring-shaped magnetically anisotropic conductive material with an inner diameter r and an outer diameter R is manufactured by filling the gap between the holes 3 with powder 14 of a conductive material such as copper or aluminum and heating and pressurizing the powder. (Actually, the components shown in FIGS. 10(a) and 10(0) will be arranged in multiple layers, but these are omitted for illustration purposes).

According to this manufacturing method of magnetically anisotropic conductive material, compared to a manufacturing method in which a conductive material is cast between a composite material consisting of a magnetic material and a conductive material, manufacturing is easier and the space factor of the magnetic material is lower. You can improve your performance.

Other uses of the magnetically anisotropic conductive material described above include, for example, wafers for induction conductors. Figure 11 (a),
([1) shows the stator 8 located on the outer periphery of the rotor 7 described above and the wafer 10 used therein, and the coil 9 inserted into the stator 8 is fixed by a wedge effect. . This wafer 10 has a structure in which composite materials are arranged in parallel, but the directions of the parallel arrangement are alternately shifted for each layer, so that they intersect at an angle of 60°, for example. Figure 12 ((), (o) shows this, where the magnetic materials of the adjacent layers shown by solid lines and dotted lines are shifted by 60". If such a material is used in an induction conductor, the characteristics will be improved. There is.

[Problems that the invention aims to solve]

However, according to the conventional magnetic anisotropic conductive material in which magnetic materials intersect, it is difficult to arrange the magnetic materials of each layer intersectingly so that they are shifted by the aforementioned predetermined angle, for example, 60 degrees. There is an inconvenience that the characteristics of the conductive wing aircraft are degraded by the angle variation. □ [Means for Solving the Problems] The present invention has been made in view of the above, and in order to set the cross-gate arrangement of the magnetic material in each layer at a predetermined angle with high precision, a composite material is defined in each layer. The present invention provides a method for manufacturing a magnetically anisotropic conductive material, in which magnetically anisotropic conductive materials are arranged in parallel at a predetermined angle, and then stacked and integrated under predetermined conditions.

That is, the method for producing a magnetically anisotropic conductive material of the present invention includes arranging a predetermined number of composites in which a linear magnetic body is coated with a conductive material in parallel to form a unit layer, and a step of laminating the layers to form a laminate in which each layer is alternately changed by a predetermined angle; a step of forming a structure by integrating the laminate under predetermined conditions; and processing the structure to obtain a predetermined angle. manufacturing a workpiece having a shape of .

Here, the predetermined conditions include, for example, integration based on cold pressurization such as hydrostatic pressure, integration based on hot pressurization, or use of molten conductive material. It is possible to adopt integration based on molded casting. In addition, the applications of the workpiece include wafers for induction wing machines, wafers for synchronous motors, and electric ff1J[
The present invention can be applied to rotors, rails of linear motors, etc., but is not limited thereto. Further, the space factor of the magnetic material is preferably 35% or more, although it depends on the application.

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

〔Example〕

First, as shown in FIG. 1 (<), (TI), a rectangular wire 13 made of oxygen-free copper is used as a composite wire in which a conductive material 12 is coated on the circumference of a magnetic material 11. The cross-sectional dimensions of the oxygen-free copper-coated rectangular wire 13 are 1.4 mm x 1.4 mm.
4. Oxygen-free copper coating thickness is 0.1++m, length is 8
01 standard size.

This oxygen-free copper-covered rectangular wire 13 is pretreated by cleaning. Next, as shown in FIG.
9, intersect each layer and arrange them densely, stacking them up to 142 layers. Next, as shown in FIG.
0 into the elaborate quadrilateral space 20A, and then the heating device 21
Heated to 900-950°C with heater 21A of 10
Hold for ~60 minutes (Figure 4 (a)).

After this, immediately press the push rod 25 using the hydraulic press to 700 to 1
000 kg/c- and held for 5 to 60 minutes (Figure 4 (■)). Here, 23 is an outer mold, and 24 is a wedge. As a result, the oxygen-free copper-sheathed rectangular wires 13 in the inner mold case 19 are integrated by metallurgical bonding of adjacent oxygen-free copper comrades, and a laminated block 22 of the oxygen-free copper-sheathed rectangular wires 13 is obtained. (Figure 5). In this embodiment, in order to prevent the oxidation of the rectangular wire 13 covered with oxygen-free copper due to heating, the atmosphere inside the inner mold case 19 may be made into a reducing or inert state. The gap between the rectangular wires 13 to be steel may be filled with powder of the conductive material. This makes it possible to connect the oxygen-free copper sheathed rectangular wires 13 to each other more reliably and easily. In addition, the material of the inner case 19 is stainless steel (SUS).
304), the laminated block 22 of the rectangular wire 13 made of oxygen-free copper can be easily peeled off and taken out from the inner mold case 19. Next, the oxygen-free copper-coated flat wire 1
A wafer 10 is obtained by processing the cross section of the laminated block 22 of No. 3 according to the wafer dimensions of the electrical equipment (FIG. 6).

At this time, if the length of one block of wafers 10 is insufficient, a long wafer 26 can be obtained by connecting several blocks of wafers 10 with silver solder or the like (FIG. 7).
. In this embodiment, the oxygen-free copper-clad rectangular wire 13 was used as the composite wire, but the same method can be applied to the case where an aluminum wave-tone rectangular wire is used.

The manufacturing conditions for the method for manufacturing the magnetically anisotropic conductive material described above are as follows.

(1) Heating temperature: 900 to 950°C If it is less than 900°C, the flat wire 13 of the oxygen-free copper sheathing will cause poor adhesion. When the temperature exceeds 950℃, the oxygen-free copper-coated rectangular wire 1
Oxidation of No. 3 progresses and causes poor adhesion. At the same time, upon pressurization, copper outflow occurs.

(2) Heating time: 10 to 60 minutes If it is less than 10 minutes, the flat wire 13 of the oxygen-free copper sheathing will cause poor adhesion. If the time exceeds 60 minutes, oxidation will progress and poor adhesion will occur.

(3) Pressure force 700-1000 kg/cJ7
Below 00 kg/cf, oxygen-free copper coated rectangular wire 1
3 causes poor adhesion. If it exceeds 1000 kg/CIl, the copper coating thickness of the rectangular wire 13 coated with oxygen-free copper becomes uneven.

(4) Pressure holding time: 5 to 60 minutes If it is less than 5 minutes, the oxygen-free & F4 steel covered harmonic wire 13 will cause poor adhesion. There is no change in the degree of adhesion even after 60 minutes.

In addition to the above-mentioned embodiments, +11 A magnetically anisotropic conductive material having characteristics such as high strength, high modulus of elasticity, heat resistance, and light weight can be obtained by incorporating reinforcing fibers into the conductive material. Can be done.

(2) A magnetically anisotropic conductive material can be produced by preparing a molten metal of the same type of metal as the conductive material covering the rectangular wires, and casting the molten conductive material into the gaps between the many rectangular wires. . In this case, if the molten metal is cast by pressurizing, vibrating, or applying centrifugal force, a product can be formed that is tightly integrated without forming cavities between adjacent rectangular wires.

〔Effect of the invention〕

As explained above, according to the method for manufacturing a magnetically anisotropic conductive material of the present invention, the composite materials are arranged in parallel at a predetermined angle in each layer, and are laminated and integrated under predetermined conditions. , the intersecting arrangement of the magnetic materials in each layer can be set at a predetermined angle with high precision.

In addition, the space factor of the magnetic material can be easily controlled and improved, and a magnetically anisotropic conductive material with excellent properties can be obtained.

Needless to say, it is possible to manufacture magnetically anisotropic conductive materials of any length depending on the length of the composite material, and by using magnetically anisotropic conductive materials of stable quality, electrical equipment such as induction motors, etc. can improve the characteristics of

[Brief explanation of drawings]

Figure 1 C4), Figure 7 from (0) shows an embodiment of the present invention, Figure 1 (IT) is an explanatory diagram showing a composite material,
Figure 2 is an explanatory diagram showing the inner mold case in which composite materials are laminated;
Figure 3 is an explanatory diagram showing the inner mold that houses the inner mold case;
Figures (a) and (u) are explanatory diagrams showing the heating device and pressurizing device, Figure 5 is an explanatory diagram showing the laminated structure, Figure 6 is an explanatory diagram showing the wafer, and Figure 7 is an explanatory diagram showing the connection using silver solder. FIG. Figures 8 (a) and (b) are explanatory diagrams showing the rotor of the induction motor and the magnetically anisotropic conductive material, Figures 9 ((), (El) and Figure 10 ((),
(o) is an explanatory diagram showing a conventional method for manufacturing a magnetically anisotropic conductive material. FIGS. 11(A) and 11(Il+) are explanatory diagrams showing an induction motor and a wedge used therein. Figure 12 (
(), (I+) are explanatory diagrams showing wafers. Explanation of symbols 1 −−−−−−−−−=−Rotor rotation axis 2−−−
−−−−−−−'−−−−−Electrifying outer cover 3−−−−−−
−−−−−One rotor core 4 −−−−−−−−−11−
----Magnetic material 5 -------------1.-Conductive material 6---------------1--Magnetic anisotropic conductive material 7-- ---One----------Rotor 8--Stator 10-- −
−−−−−−−−−Magnetic material 12−−−−−−・−−
----1--Conductive material I3-・----1-----
−−−Composite material 14−−−−−−−−−−−−−
---Conductive powder 19-----11-----
-Inner mold case 20-----Inner mold
□21---------Heating device 22---・------------11---Laminated structure 23---・------ -Outer mold 24-
−−−−−1・−・・−−−−−−・Wedge 25−=−
----
−−−−−−−−−1−・Inner case 20,,−−−
-,,-,,-inner mold 21, ---------1--Heating device 2
2 ``”'-''--・-----One-layer structure 23
−−−−−−−−−−−−−−−−−−Outer mold 24− ・
−−−−−−1−−−−・−Wedge 25−−−−−−
----------One push rod Figure 4 C-2 ◇ Figure 5 10--・-------------1-Uni sea urchin noji 26
,, ----1--------・---Uni, 2nd Figure 6, Figure 7■ ・・・----1-1---------- Rotor rotating shaft 2---1--1--Electrifying jacket 3-. −． −・−1−−−−・−−−−One rotor core 4
---・-----------Magnetic material Fig. 8C A] Shin (Il:l) 11---------------Magnetic material 12- −
----------mm Electric material IF113------
----------Composite material 14-1------
-----Electrical appearance Figure 9 C A) C mouth J Figure 10

Claims (2)

[Claims] (1) In a method for manufacturing a magnetically anisotropic conductive material in which magnetic permeability in a predetermined first direction and magnetic permeability in a second direction different from the first direction are different, a linear magnetic body is used as a conductive material. forming a unit layer by arranging a predetermined number of composites coated in parallel in parallel, and laminating the unit layers to form a laminate in which each layer is alternately changed by a predetermined angle; 1. A method of manufacturing a magnetically anisotropic conductive material, comprising: forming a structure in which two bodies are integrated under predetermined conditions; and processing the structure to produce a workpiece having a predetermined shape. Production method. (2) A patent claim in which the step of forming the laminate includes forming the laminate by arranging and laminating rectangular wires made of linear magnetic bodies coated with a conductive material in the parallelogram space having the predetermined angle. A method for producing a magnetically anisotropic conductive material according to item 1.