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Method for preparing complicated shape bonded magnet by utilizing 3D (three-dimensional) printing technology

A bonded magnet and 3D printing technology, applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problems of difficult shapes, high processing costs, complex magnets, etc., to improve production efficiency and product size accuracy High, reproducible results

Active Publication Date: 2014-06-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most practical permanent magnet materials are manufactured by sintering, bonding, and casting methods. The magnets are hard and brittle. Grinding is often used for machining. It is difficult to make complex and thin magnets. In addition, the processing cost of magnets that require strict dimensional accuracy is high. , is the main reason for the high price

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Implementation example 1: Using 3D printing technology to prepare ferrite bonded magnets

[0027] 1. Determine the composition of magnetic alloy powder and the composition of binder and additives

[0028] (1) Select strontium ferrite powder with an average particle size of 50 μm as the raw material magnetic alloy powder;

[0029] (2) The coupling agent is silane-based KH-550, the binder is nylon 6, and a small amount of antioxidant (0.4%), lubricant (0.7%), heat stabilizer (0.2%), the above percentages are volume percentage;

[0030] 2. Prepare printing materials

[0031] (1) Mixing of magnetic alloy powder: Dissolve 2g of silane coupling agent (KH-550) into 200ml of solvent ethanol, stir evenly, mix well with 1000g of strontium ferrite powder, and then volatilize the ethanol to complete the strontium Surface treatment of ferrite powder, and then melt and mix strontium ferrite powder, binder (nylon 6) and a small amount of antioxidant, lubricant and other additives t...

Embodiment 2

[0038] Implementation Example 2: Using 3D printing technology to prepare NdFeB bonded magnets

[0039] 1. Determine the composition of magnetic alloy powder and the composition of binder and additives

[0040] (1) Select NdFeB HDDR (hydrogen explosion) powder with an average particle size of 15 μm as the raw material magnetic alloy powder;

[0041] (2) The coupling agent is silane-based A-1100, the adhesive is nylon 12, and a small amount of antioxidant, lubricant, heat stabilizer and plasticizer.

[0042] 2. Prepare printing materials

[0043](1) Mixing of magnetic alloy powder: Dissolve 10g of silane coupling agent (A-1100) into 150ml of solvent acetone, stir evenly, mix well with 1500g of NdFeB alloy powder, and then volatilize the acetone to complete the neodymium Surface treatment of iron-boron alloy powder, and then melt and mix NdFeB alloy powder, binder (nylon 12) and a small amount of additives such as antioxidant, lubricant, heat stabilizer and plasticizer through ...

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Abstract

The invention relates to a method for a preparing complicated shape bonded magnet by utilizing a 3D (three-dimensional) printing technology, and belongs to the technical field of complicated shape bonded magnet preparation. According to the method, firstly, magnetic alloy powder, bonding agents and auxiliary agents are melted and mixed, then, a magnetic wire with a certain diameter is prepared through extrusion, next, a spray nozzle of 3D printing equipment is utilized for melting and accumulating the magnetic wire, in addition, orientation and curing are carried out, and finally, a required bonded magnet product with specific magnetism and complicated space shape is printed. The method has the advantages that the very thin bonded magnet (smaller than 0.4mm) with any complicated space shape can be prepared, the dimensional precision of the product is high, the product can be further subjected to magnetization and orientation control in the printing process, an isotropic or anisotropic permanent magnet product can be prepared, in addition, a blank and a mold are not needed in the printing process, raw materials can be greatly saved, the production efficiency can be improved, the process is stable and reliable, the operability is high, the repeatability is high, and the method is applicable to the batch production of the complicated shape bonded magnet.

Description

technical field [0001] The invention belongs to the technical field of preparation of complex-shaped bonded magnets, and in particular relates to the preparation of complex-shaped bonded magnets by using 3D printing technology. Background technique [0002] Permanent magnetic materials, also known as hard magnetic materials, are the earliest discovered and used magnetic materials. After the permanent magnetic material is magnetized in the magnetic field, the external magnetic field is removed, and it can still retain a strong magnetism, and it is not easy to be demagnetized. It can provide a constant working magnetic field in a certain space, and thus has been widely used. Most practical permanent magnet materials are manufactured by sintering, bonding, and casting methods. The magnets are hard and brittle. Grinding is often used for machining. It is difficult to make complex and thin magnets. In addition, the processing cost of magnets that require strict dimensional accura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02B22F3/115B22F3/24
Inventor 郭志猛张欣悦郭雷辰叶青柏鉴玲于海华徐延龙
Owner UNIV OF SCI & TECH BEIJING
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