Cutting, processing and surface treatment technology of ferrite magnets

In the field of modern industry and science and technology, ferrite magnets are widely used in various electronic equipment, automobile manufacturing, medical equipment and daily necessities because of their excellent magnetic properties, cost effectiveness and stable chemical properties. However, to give full play to the performance advantages of ferrite magnets, its cutting, processing and surface treatment technology is crucial. Let's discuss the cutting, processing and surface treatment technology of ferrite magnets.

1、The basic characteristics and classification of ferrite magnets

Ferrite magnets, also known as ferrite magnets or ceramic magnets, are a non-metallic material composed of iron and other metal oxides (such as strontium, barium, etc.). It has the characteristics of high coercivity, low remanence and good corrosion resistance, making it an ideal magnetic material choice in many applications. According to the composition and performance of different ferrite magnets can be divided into hard ferrite and soft ferrite two categories. Hard ferrite is mainly used to make permanent magnet materials, while soft ferrite is often used in inductors and high-frequency transformers.

2、Cutting technology of ferrite magnet

Cutting is one of the important links in the process of ferrite magnet machining. Due to the high hardness and brittleness of ferrite magnets, traditional mechanical cutting methods are often difficult to meet the requirements of accuracy and efficiency. Therefore, the use of laser cutting, electric spark wire cutting and ultrasonic cutting and other advanced cutting technology has become the mainstream.

2.1、Laser cutting

Laser cutting uses a laser beam with a high energy density to locally heat and melt a ferrite magnet, and then blows the melt away by an auxiliary gas, thus achieving precise cutting of the material. Laser cutting has the advantages of fast speed, high precision, narrow slit, etc. It is suitable for ferrite magnet cutting with complex shape and fine structure.

2.2、Electrical discharge wire cutting

Wire EDM is a kind of machining method that corrodes the material by the high temperature generated by the pulse discharge between the electrode wire and the workpiece. It is suitable for precision cutting of hard materials such as hard alloy and conductive ceramics. For ferrite magnets, EDM wire cutting can effectively avoid material breakage and crack generation, to ensure the stability of cutting quality.

2.3、Ultrasonic cutting

Ultrasonic cutting is a non-thermal processing method that uses the mechanical energy generated by ultrasonic vibration to cut materials. It has the advantages of no heat affected zone, no dust pollution, and is suitable for precision cutting of heat sensitive materials. In the cutting process of ferrite magnets, ultrasonic cutting can reduce the stress concentration and damage of the material and improve the cutting quality.

3、 Ferrite magnet processing technology

In addition to cutting, the processing of ferrite magnets also includes drilling, milling, grinding and other processes. These processes need to be selected and optimized according to the specific properties and application requirements of ferrite magnets.

3.1、Drilling and milling

Drilling and milling are common processes in ferrite magnet machining. Due to the high hardness and brittleness of ferrite magnets, it is necessary to choose the appropriate tool materials and cutting parameters during drilling and milling to avoid the problem of material breakage and tool wear too fast. At the same time, in order to improve processing efficiency and reduce costs, advanced equipment such as multi-axis linkage machining centers can be used for automated processing.

3.2、Grinding and polishing

Grinding and polishing are important means to improve the surface quality and dimensional accuracy of ferrite magnets. The burrs and defects on the surface of the material can be removed by grinding; Polishing can make the surface smoother and improve the appearance quality. In the grinding and polishing process, it is necessary to choose the appropriate abrasive and polishing agent and control the process parameters to ensure the stability and consistency of the processing effect.

4、 Ferrite magnet surface treatment technology

Surface treatment is one of the key links to improve the performance and application range of ferrite magnets. The corrosion resistance, wear resistance and aesthetics of ferrite magnets can be improved by surface treatment. Common surface treatment technologies include coatings, coatings and chemical conversion films.

4.1、Coating technology

Coating technology is a method of coating one or more protective films on the surface of ferrite magnets. Commonly used coating materials are epoxy resin, polyurethane, polyimide and other polymer materials as well as metal oxides, carbides and other inorganic materials. The coating can effectively isolate the corrosive effect of air and moisture on the ferrite magnet and extend its service life; At the same time, the ferrite magnet can also be given a specific color and gloss to improve its appearance quality.

4.2、Coating technology

Coating technology is a method of depositing a thin film of metal or alloy on the surface of a ferrite magnet. Common coating methods include electroplating, electroless plating and physical vapor deposition (PVD). The coating can improve the electrical and thermal conductivity of ferrite magnet. At the same time, it can also enhance its corrosion resistance and wear resistance. In addition, some special functional coatings such as antibacterial coatings and self-cleaning coatings can also give ferrite magnets more added value.

4.3、Chemical conversion membrane technology

The chemical conversion film technology is a method to form a dense oxide or phosphate chemical conversion film on the surface of a ferrite magnet by chemical reaction. The conversion film has good adhesion and corrosion resistance, which can effectively protect ferrite magnets from the erosion of the external environment. At the same time, the chemical conversion film can also improve the surface roughness and hydrophilicity of ferrite magnets, so as to improve its application effect and user experience.

5、 Conclusion and prospect

With the continuous progress of science and technology and the rapid development of industry, the cutting, processing and surface treatment technology of ferrite magnets is also constantly innovating and improving. In the future, with the continuous emergence of new materials, new processes and new equipment, the processing and application of ferrite magnets will be more extensive and in-depth. At the same time, environmental protection and sustainable development will also become one of the important directions of the development of the ferrite magnet industry, and promote the development of the industry in the direction of green, low-carbon and circular.
In short, the cutting, processing and surface treatment technology of ferrite magnets is the key to achieve its high performance applications. By continuously optimizing the processing technology and improving the technical level, we can better play the advantages of ferrite magnets and provide strong support for the development of all walks of life.

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