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Magnet surface treatment device and system, and surface treatment method of neodymium-iron-boron magnet

A surface treatment device and surface treatment technology, which is applied in the field of surface treatment of magnets of different sizes and shapes in batches on automatic lines, surface treatment of NdFeB magnets, and the field of magnet surface treatment devices, which can solve the problem of reducing surface treatment and failing to meet the requirements of NdFeB magnets. Magnet surface treatment requirements, difficult to improve surface treatment efficiency and other issues, to achieve the effect of no patch marks, good cleaning and passivation film formation quality, and improve production efficiency

Pending Publication Date: 2021-11-02
YANTAI ZHENGHAI MAGNETIC MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For example, patent document CN106148927 discloses a device and method for surface treatment of a large-size magnet roller; patent document CN106435678B discloses a surface treatment method in which a specific roller is equipped with steel balls; Special tools for magnet rack plating, none of the above treatment devices or treatment methods can meet the surface treatment requirements of NdFeB magnets of any size and shape, and it is difficult to improve the surface treatment efficiency and reduce the defective rate caused by surface treatment

Method used

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  • Magnet surface treatment device and system, and surface treatment method of neodymium-iron-boron magnet
  • Magnet surface treatment device and system, and surface treatment method of neodymium-iron-boron magnet
  • Magnet surface treatment device and system, and surface treatment method of neodymium-iron-boron magnet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] The above-mentioned surface treatment method is used to carry out phosphating treatment on the magnet, wherein the channel of the spiral rotary channel 3 is a back-shaped polyurethane (the cross-sectional view is as shown in Fig. Figure 4As shown in the middle right figure), the slope is 15°, the magnet to be treated is a cuboid, and the unit weight is 396g; the treatment liquid is a zinc-based phosphating liquid, the treatment temperature is 55°C, and the flow rate of the phosphating liquid is 40L / min , the transmission medium is spherical glass beads with a diameter of 8-10mm, the mass ratio of the magnet to the transmission medium is 6:1, and the residence time of the magnet in the channel is 10min. After screening, the magnet enters the water washing tank and the ultrasonic cleaning tank for Cleaning, and finally blow-drying and drying, the magnet is first blown with hot air at a certain temperature, and then dried at 105°C for 30 minutes to obtain a magnet after pho...

Embodiment 2

[0093] Adopt the above-mentioned surface treatment method to carry out phosphating treatment to the magnet, wherein, the channel of the said spiral rotary channel 3 is the polyurethane of back shape, and the slope is 15°; The magnet to be treated is a C-shaped tile, with a unit weight of 3.5g; The solution is a zinc-based phosphating solution, the treatment temperature is 55°C, the flow rate of the phosphating solution is 30L / min, the transmission medium is spherical zirconia with a diameter of 3-5mm, and the mass ratio of the magnet to the transmission medium is 10:1 , The magnet stays in the channel for 10 minutes. After screening, the magnet enters the water washing tank and the ultrasonic cleaning tank for cleaning, and finally blows and dries the magnet. drying to obtain a phosphating-treated magnet.

[0094] For the phosphating film on the surface of the magnet after phosphating treatment, EDS-7200 energy spectrometer was used to analyze the surface appearance and compos...

Embodiment 3

[0096] The above-mentioned surface treatment method is used to carry out silane conversion treatment on the magnet, wherein the channel of the spiral rotary channel 3 is U-shaped polyurethane (the cross-sectional view is as follows Figure 4 As shown in the middle left picture), the slope is 30°, the magnet to be treated is a cuboid, and the unit weight is 15.7g; the treatment liquid is a silane conversion liquid, the treatment temperature is normal temperature, and the flow rate of the conversion liquid is 35L / min. It is a spherical glass bead with a diameter of 5-7mm. The mass ratio of the magnet to the transmission medium is 5:1. The residence time of the magnet in the channel is 3min. Blow the magnet with hot air at a certain temperature, and then dry it at 105° C. for 30 minutes to obtain a magnet after silane conversion treatment.

[0097] For the conversion film on the surface of the magnet after the silane conversion treatment, the surface appearance and composition of ...

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Abstract

The invention relates to a magnet surface treatment device and system, and a surface treatment method of a neodymium-iron-boron magnet. The magnet surface treatment device comprises a main shaft and a spiral rotation channel wound on the main shaft; the main shaft is used for providing support; and the spiral rotary channel is spirally wound on the main shaft and is used for loading and conveying the magnet. According to the method, the neodymium-iron-boron magnet is placed in a spiral rotation device channel, and under the action of a main shaft vibration system and gravity, the neodymium-iron-boron magnet vibrates and slides to the bottom from the top of the spiral rotation device channel under full soaking of treatment liquid, and therefore surface treatment is completed. According to the neodymium-iron-boron magnet surface treatment device and system, good cleaning and passivation film forming quality is guaranteed, meanwhile, the occupied area is small, the generation efficiency is greatly improved, and the cleaning and passivation requirements of neodymium-iron-boron magnets of any size and shape are met through a single device.

Description

technical field [0001] The invention belongs to the field of magnet surface treatment, and relates to a magnet surface treatment device, a system and a surface treatment method for NdFeB magnets, and is especially suitable for surface treatment of magnets of different sizes and shapes in batches by an automatic line. Background technique [0002] In recent years, the market demand and industrial scale of sintered NdFeB permanent magnet materials are developing rapidly, and its application fields cover many industries such as modern household appliances, industrial motors, microelectronic motors, and new energy vehicles. However, there are certain disadvantages in their promotion. These magnetic materials are easily corroded in the process of contacting with air and moisture, resulting in changes in performance. Therefore, surface treatment on their surfaces is essential. [0003] The surface treatment of NdFeB magnets mainly includes degreasing, pickling, water washing and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02
CPCH01F41/02H01F41/026
Inventor 史丙强周彬祁晓平阎坤邵梅竹
Owner YANTAI ZHENGHAI MAGNETIC MATERIAL CO LTD
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