Surface pretreatment method of annular bonded NdFeB magnet

A surface pretreatment, NdFeB technology, applied in the direction of inductance/transformer/magnet manufacturing, electrical components, circuits, etc., to prevent corrosion, avoid damage to the adhesive, and reduce the effect of impact

Active Publication Date: 2017-10-20
CHINA NUCLEAR TIANJIN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional surface pretreatment methods cannot realize the surface pretreatment of bonded NdFeB magnets

Method used

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  • Surface pretreatment method of annular bonded NdFeB magnet
  • Surface pretreatment method of annular bonded NdFeB magnet

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Embodiment Construction

[0024] Below, the present invention is described in detail with reference to accompanying drawing and embodiment:

[0025] like figure 1 , 2 As shown, the ring-shaped bonded NdFeB magnet surface pretreatment method is characterized in that: comprising the following steps:

[0026] A ring-shaped bonded NdFeB magnet surface pretreatment method, characterized in that: comprising the following steps:

[0027] (i) Place the bonded NdFeB magnet 7 obliquely in the cleaning hanger 2, the hanger 2 includes parallel transverse struts 3 supporting the side of the bonded NdFeB magnet 7 and the two sides of the bonded NdFeB magnet 7 The longitudinal struts 4, the longitudinal struts 4 on both sides are respectively provided with an upwardly inclined upper limit protrusion 5 and a downwardly inclined lower limit protrusion 6 supporting the upper and lower end surfaces of the bonded NdFeB magnets 7, and the bonded NdFeB magnets 7. Form four-point oblique positioning in the hanger 2;

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Abstract

The invention discloses a surface pretreatment method of an annular bonded NdFeB magnet, which comprises the following steps: placing the bonded NdFeB magnet on a hanger; placing the hanger in a cleaning tank; Water-based cleaning agent; perform ultrasonic cleaning; take out the hanger and drain; put the cleaned bonded NdFeB magnet into a drying tank and dry it with compressed air at room temperature. The four-point oblique positioning hanger in the present invention can minimize the impact of the support points on the cleaning effect during the cleaning process, avoid the accumulation of fluid on the surface of the workpiece, and enable surface impurities to separate from the workpiece by its own weight. In the present invention The non-water-based cleaning agent can prevent the corrosion of the substrate while avoiding damage to the binder. Ultrasonic cleaning can effectively improve the cleaning effect.

Description

technical field [0001] The invention belongs to a surface pretreatment method, in particular to a surface pretreatment method of an annular bonded NdFeB magnet. Background technique [0002] Before surface treatment such as spraying, electrophoresis, electroplating, etc., the surface of the workpiece to be treated should be cleaned, mainly to remove residual impurities on the surface of the workpiece, which can effectively improve the bonding strength of the surface treatment layer, thereby prolonging the service life. [0003] Bonded NdFeB magnet is a powder metallurgy material made by mixing NdFeB magnetic powder and binder. The matrix bonding strength is low, and because NdFeB is easily corroded, improper surface pretreatment is easy Destroy the NdFeB matrix. In addition, the ring-shaped NdFeB workpieces used in some special industries need to be machined, and the powder residue generated after the machining damages the surface will adhere to the gap between the bonded N...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G3/00H01F41/02
Inventor 郑文肖凯业许海
Owner CHINA NUCLEAR TIANJIN TECH DEV
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