JPS6216043A - Manufacture of magnetic isotropic material - Google Patents

Abstract

PURPOSE:To improve the space factor of a magnetic material by aligning a large number of composite wires coated with conductive materials consisting of oxygen-free copper in the fixed direction and closely bringing them into contact on the circumference of the magnetic material and mutually bonding and unifying the conductive materials through heating and pressing. CONSTITUTION:The upper section of the circumference of a steel wire (a magnetic material) 11 having a diameter such as 0.55mm is covered with oxygen-free copper 2, and a composite wire 3 having an outer diameter of 0.60mm is formed, and cut in length of 80mm and the surface is washed and treated. A large number of the slices of the composite wire 3 are aligned in the same direction, and housed in a heating pressure-welding device 4, and the upper sections of the slices are covered with a stem 5. The inside is evacuated or filled with a reducing gas, the slices of the composite wire are heated to 900 deg.C by an electric heater 6 while applying pressure of 35-70kg/cm<2> by a hydraulic cylinder 7, an oxygen-free steel coatings 2 are fusion-bonded. The slices of the composite wire are taken out and machined to predetermined shape after pressure welding. Accordingly, the space factor of the magnetic material is improved, thus adjusting the space factor, then also enhancing productivity.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing a magnetically anisotropic material.

Especially dampers of synchronous motors and rotors of induction motors.

The present invention relates to a method of manufacturing a magnetically anisotropic material that can be applied to rails of linear motors, etc.

[Prior Art] A magnetically anisotropic material made of a composite material made by combining a conductive material such as CU or AJ with a magnetic material such as Fe has been proposed to have both ease of flow of magnetic flux and ease of flow of induced current. Applications are being considered for dampers of wJ electric jammers, rotors of induction motors, rails of linear motors, etc.

In this case, if the magnetic material is uniformly distributed in the conductive material and its space factor is 40% or more, the magnetic anisotropic material can control both current and magnetic force as desired. It has very high efficiency and can be used as a rotor for an S1F motive, for example, because it is small and low! It has been experimentally confirmed that it has an excellent effect on making the A sound.

However, it is very difficult to uniformly distribute the magnetic material in the conductive material with a space factor of 40% or more in terms of manufacturing technology, and as a countermeasure, steel wire bundles have been arranged densely and corroded. A method of casting using Qu or AJ has been used.

[Problems to be solved by the invention] According to this method, if the steel wire bundle is very dense, Cu and A
If the molten metal of J does not enter deep into the steel wire bundle and the steel wires, which are magnetic materials, are not evenly distributed in Cu or A1, which are conductive materials, and the steel wires are in contact with each other, it is easy to form voids. The properties as a magnetically anisotropic material deteriorate or are no longer exhibited. On the other hand, if the steel wire bundle is arranged roughly and Cu, Af, etc. are cast, no voids will be formed, but the space factor of the steel wire bundle will be limited to 20 to 30%, and naturally the state as a magnetically anisotropic material will not be possible. It also gets worse. Further, in such a casting method, oxidation of the surface of the steel wire becomes a very serious problem.

It is an object of the present invention to solve the above-mentioned drawbacks of the prior art, to easily improve the space factor of the magnetic material in a state in which each steel wire, which is a magnetic material, is uniformly distributed in the conductive material, and to easily manufacture the magnetic material. The object of the present invention is to provide a method for manufacturing a magnetically anisotropic material that can be produced.

[Means for Solving the Problems] In other words, the gist of the present invention is to use a composite wire in which a conductive material made of oxygen-free copper is coated on the circumference of a magnetic material such as a steel wire, instead of using a conventional steel wire. It has been used.

That is, the present invention involves arranging a large number of composite wires coated with a conductive material made of oxygen-free copper on the circumference of a magnetic material and closely arranging them in a certain direction, and bonding and integrating adjacent conductive material steel. This is a method for manufacturing a magnetically anisotropic material.

[Function] The present invention uses a composite wire in which oxygen-free copper is coated on the circumference of a magnetic material such as steel wire, and a large number of the composite wires are aligned in a certain direction and closely arranged, and then cast, soldered, or brazed. Adjacent conductive materials are bonded and integrated using a method such as heat welding or hot pressure welding, making it possible to easily and accurately adjust the steel wire space factor by adjusting the ratio of the steel wire diameter to the oxygen-free copper coating thickness. The steel wire space factor can be increased to 40% or more. In addition, the use of oxygen-free copper for the coating makes it much easier to bond than tough pitch copper, and oxygen-free copper has very good brazing and soldering properties, making it possible to arrange a large number of composite materials closely together. However, the distribution state can be maintained well and the integration can be performed reliably.

[Example] Next, an example of the method for manufacturing a magnetically anisotropic material of the present invention will be described with reference to the accompanying drawings.

First, as a composite wire coated with oxygen-free copper, as shown in Fig. 2, a steel wire (1) with a diameter of 0.55 m (! Use a composite wire (a) with an outer diameter of 0.60.
Cut into lII+ and perform surface treatment by washing. After that, a large number of composite wires (3) cut to a length of 80 m as shown in FIG. 3 are arranged in a fixed direction in a heating/pressure welding device (4) as shown in FIG. ,000 person, cover it with the stem (5), maintain the atmosphere inside the device in a vacuum or reducing atmosphere, and install the heating/pressure welding device (
4) Heat with the built-in electric heater (6). Complex (
When the temperature of No. 3 rises to 900℃, the hydraulic cylinder (applied with a pressure of about 35 Ky/ci) is used to integrate multiple composite wires (3). If the pressure can be increased to /ci, even better adhesion and bonding can be achieved.The pressure at this time should be 70 kg.
/cd, even better adhesion and bonding can be achieved.

After heating and pressure welding, it is taken out from the heating and pressure welding device (4), processed and finished into a predetermined shape, and used as a magnetic anisotropic body. In this case, the steel wire space factor can be adjusted by arbitrarily changing the ratio of the steel wire diameter to the oxygen-free copper coating thickness.
The steel wire space factor after integration can be easily changed.

Furthermore, when integrating, depending on the application, it is possible to strengthen the integration by interposing "brazing IZ11 solder" or the like between the oxygen-free copper-covered wires.

(Use the good brazing and soldering properties of oxygen-free copper.

) [Effects of the Invention] According to the present invention, by using a composite wire, the space factor of the magnetic material in the conductive material can be adjusted accurately, and the space factor can be adjusted to 40%.
% or more. In addition, by using oxygen-free copper as the coating material for the composite wire, the coating materials can be bonded together reliably and easily, and a completely new magnetic anisotropic material with unprecedented properties can be obtained. I can do it. In addition, it is possible to stabilize and improve product quality in manufacturing, significantly improve production efficiency, and reduce costs.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a manufacturing equipment in the heating/pressure welding method as an embodiment of the present invention, Fig. 2 is a cross-sectional view of an oxygen-free copper-covered wire, and Fig. 3 is a cross-sectional view of a bundle of oxygen-free copper-covered wires. FIG. 1: Steel wire (magnetic material), 2: Oxygen-free copper coating, 3: 1i combination, 4: Heating/pressure welding device, 5: Stem, 6: Electric heater, 7: Hydraulic cylinder. Agent Patent Attorney Fujio Sato Drawing j'j'':' (7A in content: No changes) Part II
! 1 21ii] 3rd
Display of Closed Case 1985 Patent Application No. 154396
No. 2 Name of invention Method for producing magnetically anisotropic material

Claims (1)

[Claims] (1) A large number of composite wires coated with a conductive material made of oxygen-free copper are arranged closely in a certain direction on the circumference of a magnetic material, and adjacent conductive materials are bonded and integrated. A method for producing a magnetically anisotropic material.