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A method for continuously producing a hot extruded radiation ring

A radiation ring and hot extrusion technology, which is applied in the manufacture of inductors/transformers/magnets, electromechanical devices, electrical components, etc., can solve the problems of low utilization rate of raw materials and low yield, low efficiency of producing hot-pressed heat-deformed radiation rings, etc. , to achieve the effects of reducing production costs and operating procedures, high production efficiency and material utilization, and less processing and grinding

Active Publication Date: 2019-01-08
ZHEJIANG DONGYANG DMEGC RARE EARTH MAGNET CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of low efficiency, low utilization rate of raw materials and low rate of finished products in the existing production of hot-pressed and heat-deformed radiation rings, the present invention provides a continuous production of hot-extruded radiation rings with high molding efficiency, high qualified rate of finished products, and uniform orientation. ring method

Method used

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  • A method for continuously producing a hot extruded radiation ring
  • A method for continuously producing a hot extruded radiation ring
  • A method for continuously producing a hot extruded radiation ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Prepare raw materials according to the following mass percentages: Nd 21.452%, Pr 0.42%, Co 0.67%, B 0.98%, Al 0.479%, Cu 0.11%, Nb 1.159%, the balance is Fe, and put it into an induction furnace for melting To obtain an ingot, when the smelted ingot is heated and melted to 1300°C, the molten liquid is sprayed to the cooling roll, the speed of the cooling roll is controlled at 20m / s, and the protective atmosphere is Ar gas to obtain a nano-composite phase quenching belt, and After homogenization treatment and crushing treatment, magnetic separation and screening are carried out to make hot-pressed magnetic powder with an average particle size of 90 mesh; (2) Add 1wt% graphite powder to the hot-pressed magnetic powder, mix it uniformly and transfer it from the mixer to a special In the silo of the extruder, the worm conveys the material into the extrusion sleeve that has been preheated to 35°C, and the powder is pre-pressed by the pressure of 30 MPa on the worm and th...

Embodiment 2

[0037](1) Prepare raw materials according to the following mass percentages: Nd 21.452%, Pr 0.42%, Co 0.67%, B 0.98%, Al 0.479%, Cu 0.11%, Nb 1.159%, the balance is Fe, put into the induction furnace The ingot was smelted in a medium, and when the smelted ingot was heated and melted to 1300°C, the melt was sprayed on the cooling roll, the speed of the cooling roll was controlled at 10m / s, and the protective atmosphere was Ar gas to obtain a nano-composite phase quenching belt. , and homogenized and crushed into a powder with a grain size of 100 μm;

[0038] (2) The quick quenching powder is prepared by the quick quenching process, the average particle size of the powder is about 100 mesh, and the powder is added with 0.5wt% MoO 2 After the powder is mixed evenly, it is transferred from the mixer to the silo of the special extruder. The worm conveys the material into the extrusion sleeve which has been preheated to 40°C. , so that the material in the extrusion sleeve is filled...

Embodiment 3

[0042] (1) Prepare raw materials according to the following mass percentages: Nd 21.452%, Pr 0.42%, Co 0.67%, B 0.98%, Al 0.479%, Cu 0.11%, Nb 1.159%, and the balance is Fe, which is put into an induction furnace The ingot is smelted, and when the smelted ingot is heated and melted to 1300°C, the molten liquid is sprayed on the cooling roll, the speed of the cooling roll is controlled at 30m / s, and the protective atmosphere is Ar gas to obtain a nano-composite phase quenching belt. Homogenized and crushed into a powder with a grain size of 100 μm;

[0043] (2) The quick-quenching powder is prepared by the quick-quenching process, and the average particle size of the powder is about 90 orders. After the powder is added with 0.8wt% paraffin and mixed evenly, it is sent from the mixer to the feed bin of the special extruder, and the worm conveys the material to In the extrusion sleeve that has been preheated to 43°C, the powder is pre-pressed by the pressure of 38 MPa of the worm...

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Abstract

The invention relates to the technical field of manufacturing magnetic materials, in particular to a method for continuously producing a hot extrusion radiation ring, comprising the following steps: (1) preparing a nano composite phase fast-quenching belt by using a melt fast-quenching technology, and homogenizing and crushing the nano composite phase fast-quenching belt to prepare a hot-pressingmagnetic powder; (2), adding lubricant and mixing that homogeneou mixture, transferring the mixture to a hopper of a special extruder, and filling the mixture densely; (3) feeding into a continuous hot extrusion die, pressing into a hot pressing zone to obtain a full-density alloy, and then entering into a deformation zone to obtain a hot extrusion radiation ring. The invention skillfully places the hot pressing and the hot deformation of the hot extruding radiation ring in different segments in the same mold, The invention solves the problem that the hot-pressed radiation ring can not be continuously produced. The method has the advantages of high yield and material utilization ratio, uniform orientation, less grinding amount in the post-processing, greatly reducing the production cost and operation procedures, and is suitable for automatic batch production.

Description

technical field [0001] The invention relates to the technical field of magnetic material manufacture, in particular to a method for continuously producing hot-extruded radiation rings. Background technique [0002] With the promotion of automation technology, the demand for permanent magnet motors is increasing. Generally speaking, what a permanent magnet motor requires is a radial annular magnetic field. Obtaining a radial magnetic field can be achieved by splicing magnetic tiles or preparing a radiation ring. The magnetic field waveform obtained by the radiation ring tends to be more like a saddle wave, and the motor runs more smoothly. At present, high-end motors such as EPS steering motors use radiation-oriented magnetic rings. [0003] At present, there are two main ways to prepare radiation-oriented magnetic rings: [0004] (1) Conventional sintered radiation ring process: while the magnetic powder is oriented in the radiation magnetic field generated by the coil or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H02K15/03B22F1/00B22F3/20B22F5/10
CPCH02K15/03H01F41/0266B22F3/20B22F5/106B22F2003/208B22F1/10
Inventor 洪群峰韩相华孙永阳郝忠彬
Owner ZHEJIANG DONGYANG DMEGC RARE EARTH MAGNET CO LTD
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