A method for continuous production of hot extruded radiant rings

A radiation ring and hot extrusion technology, which is applied in the manufacture of inductors/transformers/magnets, manufacture of stator/rotor bodies, transportation and packaging, etc., can solve the problems of low efficiency, raw material utilization rate and yield rate in the production of heat-pressed and thermally deformed radiation rings No problems such as high, to achieve the effect of reducing production costs and operating procedures, high production efficiency and material utilization, and less post-processing grinding

Active Publication Date: 2020-11-13
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 continuous production of hot extruded radiant rings
  • A method for continuous production of hot extruded radiant rings
  • A method for continuous production of hot extruded radiant rings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Prepare the raw materials according to the following mass percentages: Nd 21.452%, Pr 0.42%, Co 0.67%, B0.98%, Al 0.479%, Cu 0.11%, Nb 1.159%, the balance is Fe, and put it into the 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 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 to In the silo of the special 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 the extrusion sleeve,...

Embodiment 2

[0037](1) Prepare raw materials according to the following mass percentages: Nd 21.452%, Pr 0.42%, Co 0.67%, B0.98%, Al 0.479%, Cu 0.11%, Nb1.159%, the balance is Fe, put into the induction The ingot is smelted in the furnace. 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 10m / s, and the protective atmosphere is Ar gas to obtain nano-complex 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 densely;

...

Embodiment 3

[0042] (1) Prepare raw materials according to the following mass percentages: Nd 21.452%, Pr 0.42%, Co 0.67%, B0.98%, 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 molten liquid was sprayed on the cooling roll, the speed of the cooling roll was controlled at 30m / 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;

[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 o...

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Abstract

The invention relates to the technical field of magnetic material manufacturing, in particular to a method for continuously producing hot-extruded radiant rings, comprising the following steps: (1) preparing a nano-composite phase quenching strip by using melt quenching technology, and homogenizing processing and crushing to make hot-pressed magnetic powder; (2) add lubricant and mix evenly to obtain the mixture, transfer it to the special extruder hopper, and fill it densely; (3) send it into the continuous hot extrusion mold, enter The hot pressing zone is pressed into a full-density alloy, and then enters the deformation zone to obtain a hot-extruded radiant ring. The invention cleverly puts the hot pressing and thermal deformation of the hot extrusion radiation ring in different sections of the same mold, which solves the problem that the hot pressing radiation ring cannot be produced continuously. The method has high yield and material utilization rate, and the orientation Uniformity, less post-processing grinding, can greatly reduce production costs and operating procedures, and is suitable for automated mass 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 Patents(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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