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A permanent magnet ring assembly and its manufacturing method

A permanent magnet ring and component technology, which is used in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problems of low performance and low uniformity of permanent magnet ring components, and solve difficult processing problems and structural symmetry. The effect of good performance and reducing the difficulty of magnetization

Active Publication Date: 2016-10-05
CENT IRON & STEEL RES INST
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  • Abstract
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  • Application Information

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Problems solved by technology

The performance of the permanent magnet ring assembly manufactured by the prior art is low or the uniformity is not high, which limits the further development of the inertial parts to high precision, small volume and weight, and high stability, thus obtaining a permanent magnet torque device that meets the development needs of the permanent magnet torquer. The manufacturing method of the permanent magnet ring assembly is very necessary

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  • A permanent magnet ring assembly and its manufacturing method
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preparation example Construction

[0045]The preparation method of the above-mentioned permanent magnetic alloy material is a powder metallurgy process, and the process includes alloy smelting→dry or wet powder making→high magnetic field orientation molding→protective atmosphere sintering and gradient heat treatment→obtaining rare earth-cobalt-based permanent magnets that meet the requirements of radiation orientation. magnetic alloy material.

[0046] The specific preparation method of the rare earth-cobalt-based permanent magnet alloy material required for the permanent magnet ring assembly of the permanent magnet torque device of the present invention comprises the following steps:

[0047] a) Prepare alloy raw materials according to the composition of alloy components, and melt and cast ingots;

[0048] b) After the alloy ingot is coarsely crushed, it is jet-milled into powder under a protective atmosphere, and the particle size of the powder is 3.5-5 μm;

[0049] c) The powder is formed by magnetic field ...

Embodiment 1

[0060] The permanent magnetic alloy preparation process method of embodiment 1 is: the alloy raw material composition (by weight) is Sm: 25%, Co: 49%, Cu: 5%, Zr: 2.8%, Fe: 18.2% smelting ingot, After the alloy ingot is coarsely crushed, it is milled into a powder of about 5 μm in a protective atmosphere, and the powder is oriented by a strong magnetic field greater than 1.5T. A lubricant is added during the forming process. After further cold isostatic pressing, sintering and tempering heat treatment are carried out. The heat treatment system is sintering temperature 1205°C for 1 hour, then solution treatment at 1175°C for 4 hours, rapid cooling to room temperature, tempering treatment at 840°C for 12 hours, controlled temperature cooling to 400°C and rapid cooling to room temperature. The results of testing the performance indicators of permanent magnet materials at room temperature show that remanence Br=11.1kGs, coercive force Hc=17.8kOe, and the prepared rare earth-cobalt-...

Embodiment 2

[0063] The permanent magnetic alloy preparation process method of embodiment 2 is: alloy raw material composition (by weight) is Sm: 24.2%, Co: 52.0%, Cu: 3.0%, Zr: 3.8%, balance Fe melting ingot, alloy After the ingot is coarsely crushed, it is milled into a powder of about 3.5 μm in a protective atmosphere, and the powder is oriented by a strong magnetic field greater than 1.5T. A lubricant is added during the forming process. After further cold isostatic pressing, sintering and tempering heat treatment are carried out. The heat treatment system is sintering temperature at 1210°C for 35 minutes, then solution treatment at 1195°C for 2 hours, rapid cooling to room temperature, tempering treatment at 840°C for 5 hours, controlled temperature cooling to 400°C and rapid cooling to room temperature. The performance index results of permanent magnet materials were tested at room temperature, remanence Br=10.6kGs, coercive force Hc=19.6kOe.

[0064] The prepared rare earth-cobalt-b...

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Abstract

The invention belongs to the technical field of instruments and meters, and relates to a manufacturing technology of a permanent magnet torquer assembly for an inertial instrument, in particular to a rare earth-cobalt-based radial permanent magnetic ring assembly and a manufacturing method thereof. The permanent magnetic ring assembly adopts rare earth-cobalt-based permanent magnetic alloy materials, and a plurality of radial magnetic pole pieces (1) are prepared by powder metallurgy. Each radial magnetic pole piece (1) has a single magnetic pole direction A. A plurality of radial magnetic pole pieces (1) are bonded and fixed to form a cylindrical permanent magnet ring assembly. The mechanical strength of the permanent magnet ring assembly is reliable, and it is easy to realize the precision manufacturing of the magnetic element in the neutral state. After magnetization, the radial magnetic field strength on the surface of the magnetic pole is large and the uniformity is good, which solves the problem of low magnetic performance on the surface of the radial permanent magnet ring, which is uniform and stable. The problem of poor performance and low assembly accuracy.

Description

technical field [0001] The invention belongs to the technical field of instruments and meters, and relates to a permanent magnet ring component used in a permanent magnet torquer, a core component of a high-precision inertial instrument, and a manufacturing method thereof. Background technique [0002] With the development of the aerospace industry, higher requirements are put forward for the control accuracy and stability of the inertial navigation control system, and the miniaturization and lightweight development of the system also imposes stricter requirements on the structural volume and weight of the inertial instrument components. As a key component of inertial measurement devices such as gyroscopes and accelerometers, the torquer's working performance plays a very important role in the measurement of inertial instruments. The permanent magnet torquer has been widely used in inertial instruments due to its good stability and linearity. The main component of the perman...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/053H01F41/02
Inventor 陈红升李卫冯海波方以坤孙威朱明刚潘伟
Owner CENT IRON & STEEL RES INST
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