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Surface pretreatment method for annular adhered neodymium-iron-boron magnet

A surface pretreatment and NdFeB technology, which is applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., to improve the cleaning effect, avoid liquid accumulation, and reduce the impact

Active Publication Date: 2015-03-04
CHINA NUCLEAR TIANJIN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 for annular adhered neodymium-iron-boron magnet
  • Surface pretreatment method for annular adhered neodymium-iron-boron 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 for an annular adhered neodymium-iron-boron magnet. The surface pretreatment method comprises the following steps: arranging the adhered neodymium-iron-boron magnet on a hanging tool; putting the hanging tool in a washing tank; pouring a non-water-based detergent into the washing tank; performing ultrasonic cleaning; taking out the hanging tool and draining; and putting the cleaned adhered neodymium-iron-boron magnet in a drying tank and drying at normal temperature by blowing compressed air. Due to a four-point inclined locating hanging tool, the surface pretreatment method disclosed by the invention can farthest reduce influences caused by supporting points on the cleaning effect during a cleaning process, can prevent liquid accumulation on the surface of a work-piece and can also enable impurities on the surface to be removed from the work-piece due to the own weight of the impurities. The non-water-based detergent can be used for preventing corrosion caused to the base body and also preventing damages of an adhesive, and the cleaning effect can be effectively improved due to the ultrasonic cleaning.

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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IPC IPC(8): C23G3/00H01F41/02
Inventor 郑文肖凯业许海
Owner CHINA NUCLEAR TIANJIN TECH DEV