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Manufacturing method of low-eddy-current heating combined magnet and clamping tool

An eddy current heating and production method technology, applied in the direction of inductor/transformer/magnet manufacturing, electrical components, circuits, etc., can solve the problems of residual, easy to generate air bubbles, affect the bonding of magnet components, etc. Reduce the effect of air bubbles

Active Publication Date: 2020-03-31
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above method, when coating and curing, the glue will remain on the surface of the magnet, which needs to be processed. In addition, the magnet components are easily bonded to produce air bubbles, which will affect the bonding between the magnet components.

Method used

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  • Manufacturing method of low-eddy-current heating combined magnet and clamping tool
  • Manufacturing method of low-eddy-current heating combined magnet and clamping tool
  • Manufacturing method of low-eddy-current heating combined magnet and clamping tool

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Tens of composite magnets (that is, composite magnets are composed of ten magnet components) are fabricated by electrophoretic coating method. The magnet components used are all neodymium iron boron magnets, such as commercially available N42 brand neodymium iron boron magnets. In this embodiment, each magnet assembly has the same thickness, and the size is 26mm×20mm×15mm (the direction of 15mm is the orientation direction).

[0043] The fabrication of composite magnets mainly includes four steps, namely pretreatment of magnet components, electrophoretic coating, lamination and baking.

[0044] The pretreatment of magnet components includes four steps: oil removal, rust removal, activation, and phosphating:

[0045] 1) Degreasing: Degreasing in a 70°C degreasing tank for 5min-10min, then ultrasonic cleaning and deionized water cleaning;

[0046] 2) Rust removal: After the degreased NdFeB sample is dipped in 4% nitric acid solution for 30s-60s, ultrasonic cleaning and ...

Embodiment 2

[0065] Tens of composite magnets (that is, composite magnets are composed of ten magnet components) are fabricated by electrophoretic coating method. The magnets used are all NdFeB magnets, such as the commercially available N42 brand NdFeB magnets. The size of each magnet assembly is 26mm×20mm×15mm (the direction of 15mm is the orientation direction). The production process is as follows: figure 1 shown.

[0066] The fabrication of composite magnets mainly includes four steps, namely pretreatment of magnet components, electrophoretic coating, lamination and baking.

[0067] The pretreatment of magnet components includes four steps: oil removal, rust removal, activation, and phosphating:

[0068] 1) Degreasing: Degreasing in a 70°C degreasing tank for 5min-10min, then ultrasonic cleaning and deionized water cleaning;

[0069] 2) Rust removal: After the degreased NdFeB magnet assembly is dipped in 4% nitric acid solution for 30s-60s, ultrasonic cleaning and deionized water cl...

Embodiment 3

[0086] Tens of composite magnets (that is, composite magnets are composed of ten magnet components) are fabricated by electrophoretic coating method. The magnets used are all NdFeB magnets, and commercially available N42 and N48 NdFeB magnets are used. The size of each magnet assembly is 26mm×20mm×15mm (the direction of 15mm is the orientation direction).

[0087] The fabrication of composite magnets mainly includes four steps, namely pretreatment of magnet components, electrophoretic coating, lamination and baking.

[0088] The pretreatment of magnet components includes four steps: oil removal, rust removal, activation, and phosphating:

[0089] 1) Degreasing: Degreasing in a 70°C degreasing tank for 5min-10min, then ultrasonic cleaning and deionized water cleaning;

[0090] 2) Rust removal: After the degreased NdFeB sample is dipped in 4% nitric acid solution for 30s-60s, ultrasonic cleaning and deionized water cleaning are carried out;

[0091] 3) Activation: subject the ...

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Abstract

The invention discloses a manufacturing method of a low-eddy-current heating combined magnet and a clamping tool. The method comprises the following steps of preheating a magnet assembly; forming a thermosetting resin layer which is not completely cured on at least one surface of the pretreated magnet assembly; stacking the magnet assembly by adopting a clamping tool, forming the thermosetting resin layer which are not completely cured on the stacked surfaces of the magnet assembly and extruding the stacked magnet assembly under the extrusion force of 0.01 MPa to 2.5 MPa; baking and curing thestacked magnet assembly and the clamping tool in an oven atthe baking temperature of 150-200 DEG C for 10-24 h; cooking the above to acquire a combined manget. The invention further discloses a clamping tool for preparing the low-eddy-current heating combined magnet. According to the invention, the resin layer is formed on the surface of the magnet assembly and is heated and cured after being stacked, and extra treatment of redundant viscose is not needed.

Description

technical field [0001] The invention relates to a manufacturing method of a combined magnet with low eddy current heating and a clamping tool. Background technique [0002] Magnets, especially permanent magnets, are widely used in generators, motors and other fields. In order to reduce eddy current heating and improve the performance of permanent magnet motors, it is necessary to combine magnets together. The existing low eddy current heating magnet manufacturing method usually glues the magnet assembly through glue, generally adopts liquid resin glue, for example: [0003] CN103021610A discloses a composite permanent magnetic material. The material is spliced ​​by more than one permanent magnetic material, and the permanent magnetic materials are adhesives. Before bonding, the permanent magnetic materials are activated: (1) each permanent magnetic material is electrophoresed separately; (2) each permanent magnetic material after electrophoresis is soaked in an anaerobic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02
CPCH01F41/0253
Inventor 张炜叶瀚棽施尧童庆坤蓝琴周燕
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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